github.com/rohankumardubey/syslog-redirector-golang@v0.0.0-20140320174030-4859f03d829a/src/pkg/reflect/all_test.go (about) 1 // Copyright 2009 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 package reflect_test 6 7 import ( 8 "bytes" 9 "encoding/base64" 10 "flag" 11 "fmt" 12 "io" 13 "math/rand" 14 "os" 15 . "reflect" 16 "runtime" 17 "sort" 18 "sync" 19 "testing" 20 "time" 21 "unsafe" 22 ) 23 24 func TestBool(t *testing.T) { 25 v := ValueOf(true) 26 if v.Bool() != true { 27 t.Fatal("ValueOf(true).Bool() = false") 28 } 29 } 30 31 type integer int 32 type T struct { 33 a int 34 b float64 35 c string 36 d *int 37 } 38 39 type pair struct { 40 i interface{} 41 s string 42 } 43 44 func isDigit(c uint8) bool { return '0' <= c && c <= '9' } 45 46 func assert(t *testing.T, s, want string) { 47 if s != want { 48 t.Errorf("have %#q want %#q", s, want) 49 } 50 } 51 52 func typestring(i interface{}) string { return TypeOf(i).String() } 53 54 var typeTests = []pair{ 55 {struct{ x int }{}, "int"}, 56 {struct{ x int8 }{}, "int8"}, 57 {struct{ x int16 }{}, "int16"}, 58 {struct{ x int32 }{}, "int32"}, 59 {struct{ x int64 }{}, "int64"}, 60 {struct{ x uint }{}, "uint"}, 61 {struct{ x uint8 }{}, "uint8"}, 62 {struct{ x uint16 }{}, "uint16"}, 63 {struct{ x uint32 }{}, "uint32"}, 64 {struct{ x uint64 }{}, "uint64"}, 65 {struct{ x float32 }{}, "float32"}, 66 {struct{ x float64 }{}, "float64"}, 67 {struct{ x int8 }{}, "int8"}, 68 {struct{ x (**int8) }{}, "**int8"}, 69 {struct{ x (**integer) }{}, "**reflect_test.integer"}, 70 {struct{ x ([32]int32) }{}, "[32]int32"}, 71 {struct{ x ([]int8) }{}, "[]int8"}, 72 {struct{ x (map[string]int32) }{}, "map[string]int32"}, 73 {struct{ x (chan<- string) }{}, "chan<- string"}, 74 {struct { 75 x struct { 76 c chan *int32 77 d float32 78 } 79 }{}, 80 "struct { c chan *int32; d float32 }", 81 }, 82 {struct{ x (func(a int8, b int32)) }{}, "func(int8, int32)"}, 83 {struct { 84 x struct { 85 c func(chan *integer, *int8) 86 } 87 }{}, 88 "struct { c func(chan *reflect_test.integer, *int8) }", 89 }, 90 {struct { 91 x struct { 92 a int8 93 b int32 94 } 95 }{}, 96 "struct { a int8; b int32 }", 97 }, 98 {struct { 99 x struct { 100 a int8 101 b int8 102 c int32 103 } 104 }{}, 105 "struct { a int8; b int8; c int32 }", 106 }, 107 {struct { 108 x struct { 109 a int8 110 b int8 111 c int8 112 d int32 113 } 114 }{}, 115 "struct { a int8; b int8; c int8; d int32 }", 116 }, 117 {struct { 118 x struct { 119 a int8 120 b int8 121 c int8 122 d int8 123 e int32 124 } 125 }{}, 126 "struct { a int8; b int8; c int8; d int8; e int32 }", 127 }, 128 {struct { 129 x struct { 130 a int8 131 b int8 132 c int8 133 d int8 134 e int8 135 f int32 136 } 137 }{}, 138 "struct { a int8; b int8; c int8; d int8; e int8; f int32 }", 139 }, 140 {struct { 141 x struct { 142 a int8 `reflect:"hi there"` 143 } 144 }{}, 145 `struct { a int8 "reflect:\"hi there\"" }`, 146 }, 147 {struct { 148 x struct { 149 a int8 `reflect:"hi \x00there\t\n\"\\"` 150 } 151 }{}, 152 `struct { a int8 "reflect:\"hi \\x00there\\t\\n\\\"\\\\\"" }`, 153 }, 154 {struct { 155 x struct { 156 f func(args ...int) 157 } 158 }{}, 159 "struct { f func(...int) }", 160 }, 161 {struct { 162 x (interface { 163 a(func(func(int) int) func(func(int)) int) 164 b() 165 }) 166 }{}, 167 "interface { reflect_test.a(func(func(int) int) func(func(int)) int); reflect_test.b() }", 168 }, 169 } 170 171 var valueTests = []pair{ 172 {new(int), "132"}, 173 {new(int8), "8"}, 174 {new(int16), "16"}, 175 {new(int32), "32"}, 176 {new(int64), "64"}, 177 {new(uint), "132"}, 178 {new(uint8), "8"}, 179 {new(uint16), "16"}, 180 {new(uint32), "32"}, 181 {new(uint64), "64"}, 182 {new(float32), "256.25"}, 183 {new(float64), "512.125"}, 184 {new(complex64), "532.125+10i"}, 185 {new(complex128), "564.25+1i"}, 186 {new(string), "stringy cheese"}, 187 {new(bool), "true"}, 188 {new(*int8), "*int8(0)"}, 189 {new(**int8), "**int8(0)"}, 190 {new([5]int32), "[5]int32{0, 0, 0, 0, 0}"}, 191 {new(**integer), "**reflect_test.integer(0)"}, 192 {new(map[string]int32), "map[string]int32{<can't iterate on maps>}"}, 193 {new(chan<- string), "chan<- string"}, 194 {new(func(a int8, b int32)), "func(int8, int32)(0)"}, 195 {new(struct { 196 c chan *int32 197 d float32 198 }), 199 "struct { c chan *int32; d float32 }{chan *int32, 0}", 200 }, 201 {new(struct{ c func(chan *integer, *int8) }), 202 "struct { c func(chan *reflect_test.integer, *int8) }{func(chan *reflect_test.integer, *int8)(0)}", 203 }, 204 {new(struct { 205 a int8 206 b int32 207 }), 208 "struct { a int8; b int32 }{0, 0}", 209 }, 210 {new(struct { 211 a int8 212 b int8 213 c int32 214 }), 215 "struct { a int8; b int8; c int32 }{0, 0, 0}", 216 }, 217 } 218 219 func testType(t *testing.T, i int, typ Type, want string) { 220 s := typ.String() 221 if s != want { 222 t.Errorf("#%d: have %#q, want %#q", i, s, want) 223 } 224 } 225 226 func TestTypes(t *testing.T) { 227 for i, tt := range typeTests { 228 testType(t, i, ValueOf(tt.i).Field(0).Type(), tt.s) 229 } 230 } 231 232 func TestSet(t *testing.T) { 233 for i, tt := range valueTests { 234 v := ValueOf(tt.i) 235 v = v.Elem() 236 switch v.Kind() { 237 case Int: 238 v.SetInt(132) 239 case Int8: 240 v.SetInt(8) 241 case Int16: 242 v.SetInt(16) 243 case Int32: 244 v.SetInt(32) 245 case Int64: 246 v.SetInt(64) 247 case Uint: 248 v.SetUint(132) 249 case Uint8: 250 v.SetUint(8) 251 case Uint16: 252 v.SetUint(16) 253 case Uint32: 254 v.SetUint(32) 255 case Uint64: 256 v.SetUint(64) 257 case Float32: 258 v.SetFloat(256.25) 259 case Float64: 260 v.SetFloat(512.125) 261 case Complex64: 262 v.SetComplex(532.125 + 10i) 263 case Complex128: 264 v.SetComplex(564.25 + 1i) 265 case String: 266 v.SetString("stringy cheese") 267 case Bool: 268 v.SetBool(true) 269 } 270 s := valueToString(v) 271 if s != tt.s { 272 t.Errorf("#%d: have %#q, want %#q", i, s, tt.s) 273 } 274 } 275 } 276 277 func TestSetValue(t *testing.T) { 278 for i, tt := range valueTests { 279 v := ValueOf(tt.i).Elem() 280 switch v.Kind() { 281 case Int: 282 v.Set(ValueOf(int(132))) 283 case Int8: 284 v.Set(ValueOf(int8(8))) 285 case Int16: 286 v.Set(ValueOf(int16(16))) 287 case Int32: 288 v.Set(ValueOf(int32(32))) 289 case Int64: 290 v.Set(ValueOf(int64(64))) 291 case Uint: 292 v.Set(ValueOf(uint(132))) 293 case Uint8: 294 v.Set(ValueOf(uint8(8))) 295 case Uint16: 296 v.Set(ValueOf(uint16(16))) 297 case Uint32: 298 v.Set(ValueOf(uint32(32))) 299 case Uint64: 300 v.Set(ValueOf(uint64(64))) 301 case Float32: 302 v.Set(ValueOf(float32(256.25))) 303 case Float64: 304 v.Set(ValueOf(512.125)) 305 case Complex64: 306 v.Set(ValueOf(complex64(532.125 + 10i))) 307 case Complex128: 308 v.Set(ValueOf(complex128(564.25 + 1i))) 309 case String: 310 v.Set(ValueOf("stringy cheese")) 311 case Bool: 312 v.Set(ValueOf(true)) 313 } 314 s := valueToString(v) 315 if s != tt.s { 316 t.Errorf("#%d: have %#q, want %#q", i, s, tt.s) 317 } 318 } 319 } 320 321 var _i = 7 322 323 var valueToStringTests = []pair{ 324 {123, "123"}, 325 {123.5, "123.5"}, 326 {byte(123), "123"}, 327 {"abc", "abc"}, 328 {T{123, 456.75, "hello", &_i}, "reflect_test.T{123, 456.75, hello, *int(&7)}"}, 329 {new(chan *T), "*chan *reflect_test.T(&chan *reflect_test.T)"}, 330 {[10]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}, "[10]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}"}, 331 {&[10]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}, "*[10]int(&[10]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10})"}, 332 {[]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}, "[]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}"}, 333 {&[]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}, "*[]int(&[]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10})"}, 334 } 335 336 func TestValueToString(t *testing.T) { 337 for i, test := range valueToStringTests { 338 s := valueToString(ValueOf(test.i)) 339 if s != test.s { 340 t.Errorf("#%d: have %#q, want %#q", i, s, test.s) 341 } 342 } 343 } 344 345 func TestArrayElemSet(t *testing.T) { 346 v := ValueOf(&[10]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}).Elem() 347 v.Index(4).SetInt(123) 348 s := valueToString(v) 349 const want = "[10]int{1, 2, 3, 4, 123, 6, 7, 8, 9, 10}" 350 if s != want { 351 t.Errorf("[10]int: have %#q want %#q", s, want) 352 } 353 354 v = ValueOf([]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}) 355 v.Index(4).SetInt(123) 356 s = valueToString(v) 357 const want1 = "[]int{1, 2, 3, 4, 123, 6, 7, 8, 9, 10}" 358 if s != want1 { 359 t.Errorf("[]int: have %#q want %#q", s, want1) 360 } 361 } 362 363 func TestPtrPointTo(t *testing.T) { 364 var ip *int32 365 var i int32 = 1234 366 vip := ValueOf(&ip) 367 vi := ValueOf(&i).Elem() 368 vip.Elem().Set(vi.Addr()) 369 if *ip != 1234 { 370 t.Errorf("got %d, want 1234", *ip) 371 } 372 373 ip = nil 374 vp := ValueOf(&ip).Elem() 375 vp.Set(Zero(vp.Type())) 376 if ip != nil { 377 t.Errorf("got non-nil (%p), want nil", ip) 378 } 379 } 380 381 func TestPtrSetNil(t *testing.T) { 382 var i int32 = 1234 383 ip := &i 384 vip := ValueOf(&ip) 385 vip.Elem().Set(Zero(vip.Elem().Type())) 386 if ip != nil { 387 t.Errorf("got non-nil (%d), want nil", *ip) 388 } 389 } 390 391 func TestMapSetNil(t *testing.T) { 392 m := make(map[string]int) 393 vm := ValueOf(&m) 394 vm.Elem().Set(Zero(vm.Elem().Type())) 395 if m != nil { 396 t.Errorf("got non-nil (%p), want nil", m) 397 } 398 } 399 400 func TestAll(t *testing.T) { 401 testType(t, 1, TypeOf((int8)(0)), "int8") 402 testType(t, 2, TypeOf((*int8)(nil)).Elem(), "int8") 403 404 typ := TypeOf((*struct { 405 c chan *int32 406 d float32 407 })(nil)) 408 testType(t, 3, typ, "*struct { c chan *int32; d float32 }") 409 etyp := typ.Elem() 410 testType(t, 4, etyp, "struct { c chan *int32; d float32 }") 411 styp := etyp 412 f := styp.Field(0) 413 testType(t, 5, f.Type, "chan *int32") 414 415 f, present := styp.FieldByName("d") 416 if !present { 417 t.Errorf("FieldByName says present field is absent") 418 } 419 testType(t, 6, f.Type, "float32") 420 421 f, present = styp.FieldByName("absent") 422 if present { 423 t.Errorf("FieldByName says absent field is present") 424 } 425 426 typ = TypeOf([32]int32{}) 427 testType(t, 7, typ, "[32]int32") 428 testType(t, 8, typ.Elem(), "int32") 429 430 typ = TypeOf((map[string]*int32)(nil)) 431 testType(t, 9, typ, "map[string]*int32") 432 mtyp := typ 433 testType(t, 10, mtyp.Key(), "string") 434 testType(t, 11, mtyp.Elem(), "*int32") 435 436 typ = TypeOf((chan<- string)(nil)) 437 testType(t, 12, typ, "chan<- string") 438 testType(t, 13, typ.Elem(), "string") 439 440 // make sure tag strings are not part of element type 441 typ = TypeOf(struct { 442 d []uint32 `reflect:"TAG"` 443 }{}).Field(0).Type 444 testType(t, 14, typ, "[]uint32") 445 } 446 447 func TestInterfaceGet(t *testing.T) { 448 var inter struct { 449 E interface{} 450 } 451 inter.E = 123.456 452 v1 := ValueOf(&inter) 453 v2 := v1.Elem().Field(0) 454 assert(t, v2.Type().String(), "interface {}") 455 i2 := v2.Interface() 456 v3 := ValueOf(i2) 457 assert(t, v3.Type().String(), "float64") 458 } 459 460 func TestInterfaceValue(t *testing.T) { 461 var inter struct { 462 E interface{} 463 } 464 inter.E = 123.456 465 v1 := ValueOf(&inter) 466 v2 := v1.Elem().Field(0) 467 assert(t, v2.Type().String(), "interface {}") 468 v3 := v2.Elem() 469 assert(t, v3.Type().String(), "float64") 470 471 i3 := v2.Interface() 472 if _, ok := i3.(float64); !ok { 473 t.Error("v2.Interface() did not return float64, got ", TypeOf(i3)) 474 } 475 } 476 477 func TestFunctionValue(t *testing.T) { 478 var x interface{} = func() {} 479 v := ValueOf(x) 480 if fmt.Sprint(v.Interface()) != fmt.Sprint(x) { 481 t.Fatalf("TestFunction returned wrong pointer") 482 } 483 assert(t, v.Type().String(), "func()") 484 } 485 486 var appendTests = []struct { 487 orig, extra []int 488 }{ 489 {make([]int, 2, 4), []int{22}}, 490 {make([]int, 2, 4), []int{22, 33, 44}}, 491 } 492 493 func sameInts(x, y []int) bool { 494 if len(x) != len(y) { 495 return false 496 } 497 for i, xx := range x { 498 if xx != y[i] { 499 return false 500 } 501 } 502 return true 503 } 504 505 func TestAppend(t *testing.T) { 506 for i, test := range appendTests { 507 origLen, extraLen := len(test.orig), len(test.extra) 508 want := append(test.orig, test.extra...) 509 // Convert extra from []int to []Value. 510 e0 := make([]Value, len(test.extra)) 511 for j, e := range test.extra { 512 e0[j] = ValueOf(e) 513 } 514 // Convert extra from []int to *SliceValue. 515 e1 := ValueOf(test.extra) 516 // Test Append. 517 a0 := ValueOf(test.orig) 518 have0 := Append(a0, e0...).Interface().([]int) 519 if !sameInts(have0, want) { 520 t.Errorf("Append #%d: have %v, want %v (%p %p)", i, have0, want, test.orig, have0) 521 } 522 // Check that the orig and extra slices were not modified. 523 if len(test.orig) != origLen { 524 t.Errorf("Append #%d origLen: have %v, want %v", i, len(test.orig), origLen) 525 } 526 if len(test.extra) != extraLen { 527 t.Errorf("Append #%d extraLen: have %v, want %v", i, len(test.extra), extraLen) 528 } 529 // Test AppendSlice. 530 a1 := ValueOf(test.orig) 531 have1 := AppendSlice(a1, e1).Interface().([]int) 532 if !sameInts(have1, want) { 533 t.Errorf("AppendSlice #%d: have %v, want %v", i, have1, want) 534 } 535 // Check that the orig and extra slices were not modified. 536 if len(test.orig) != origLen { 537 t.Errorf("AppendSlice #%d origLen: have %v, want %v", i, len(test.orig), origLen) 538 } 539 if len(test.extra) != extraLen { 540 t.Errorf("AppendSlice #%d extraLen: have %v, want %v", i, len(test.extra), extraLen) 541 } 542 } 543 } 544 545 func TestCopy(t *testing.T) { 546 a := []int{1, 2, 3, 4, 10, 9, 8, 7} 547 b := []int{11, 22, 33, 44, 1010, 99, 88, 77, 66, 55, 44} 548 c := []int{11, 22, 33, 44, 1010, 99, 88, 77, 66, 55, 44} 549 for i := 0; i < len(b); i++ { 550 if b[i] != c[i] { 551 t.Fatalf("b != c before test") 552 } 553 } 554 a1 := a 555 b1 := b 556 aa := ValueOf(&a1).Elem() 557 ab := ValueOf(&b1).Elem() 558 for tocopy := 1; tocopy <= 7; tocopy++ { 559 aa.SetLen(tocopy) 560 Copy(ab, aa) 561 aa.SetLen(8) 562 for i := 0; i < tocopy; i++ { 563 if a[i] != b[i] { 564 t.Errorf("(i) tocopy=%d a[%d]=%d, b[%d]=%d", 565 tocopy, i, a[i], i, b[i]) 566 } 567 } 568 for i := tocopy; i < len(b); i++ { 569 if b[i] != c[i] { 570 if i < len(a) { 571 t.Errorf("(ii) tocopy=%d a[%d]=%d, b[%d]=%d, c[%d]=%d", 572 tocopy, i, a[i], i, b[i], i, c[i]) 573 } else { 574 t.Errorf("(iii) tocopy=%d b[%d]=%d, c[%d]=%d", 575 tocopy, i, b[i], i, c[i]) 576 } 577 } else { 578 t.Logf("tocopy=%d elem %d is okay\n", tocopy, i) 579 } 580 } 581 } 582 } 583 584 func TestCopyArray(t *testing.T) { 585 a := [8]int{1, 2, 3, 4, 10, 9, 8, 7} 586 b := [11]int{11, 22, 33, 44, 1010, 99, 88, 77, 66, 55, 44} 587 c := b 588 aa := ValueOf(&a).Elem() 589 ab := ValueOf(&b).Elem() 590 Copy(ab, aa) 591 for i := 0; i < len(a); i++ { 592 if a[i] != b[i] { 593 t.Errorf("(i) a[%d]=%d, b[%d]=%d", i, a[i], i, b[i]) 594 } 595 } 596 for i := len(a); i < len(b); i++ { 597 if b[i] != c[i] { 598 t.Errorf("(ii) b[%d]=%d, c[%d]=%d", i, b[i], i, c[i]) 599 } else { 600 t.Logf("elem %d is okay\n", i) 601 } 602 } 603 } 604 605 func TestBigUnnamedStruct(t *testing.T) { 606 b := struct{ a, b, c, d int64 }{1, 2, 3, 4} 607 v := ValueOf(b) 608 b1 := v.Interface().(struct { 609 a, b, c, d int64 610 }) 611 if b1.a != b.a || b1.b != b.b || b1.c != b.c || b1.d != b.d { 612 t.Errorf("ValueOf(%v).Interface().(*Big) = %v", b, b1) 613 } 614 } 615 616 type big struct { 617 a, b, c, d, e int64 618 } 619 620 func TestBigStruct(t *testing.T) { 621 b := big{1, 2, 3, 4, 5} 622 v := ValueOf(b) 623 b1 := v.Interface().(big) 624 if b1.a != b.a || b1.b != b.b || b1.c != b.c || b1.d != b.d || b1.e != b.e { 625 t.Errorf("ValueOf(%v).Interface().(big) = %v", b, b1) 626 } 627 } 628 629 type Basic struct { 630 x int 631 y float32 632 } 633 634 type NotBasic Basic 635 636 type DeepEqualTest struct { 637 a, b interface{} 638 eq bool 639 } 640 641 // Simple functions for DeepEqual tests. 642 var ( 643 fn1 func() // nil. 644 fn2 func() // nil. 645 fn3 = func() { fn1() } // Not nil. 646 ) 647 648 var deepEqualTests = []DeepEqualTest{ 649 // Equalities 650 {nil, nil, true}, 651 {1, 1, true}, 652 {int32(1), int32(1), true}, 653 {0.5, 0.5, true}, 654 {float32(0.5), float32(0.5), true}, 655 {"hello", "hello", true}, 656 {make([]int, 10), make([]int, 10), true}, 657 {&[3]int{1, 2, 3}, &[3]int{1, 2, 3}, true}, 658 {Basic{1, 0.5}, Basic{1, 0.5}, true}, 659 {error(nil), error(nil), true}, 660 {map[int]string{1: "one", 2: "two"}, map[int]string{2: "two", 1: "one"}, true}, 661 {fn1, fn2, true}, 662 663 // Inequalities 664 {1, 2, false}, 665 {int32(1), int32(2), false}, 666 {0.5, 0.6, false}, 667 {float32(0.5), float32(0.6), false}, 668 {"hello", "hey", false}, 669 {make([]int, 10), make([]int, 11), false}, 670 {&[3]int{1, 2, 3}, &[3]int{1, 2, 4}, false}, 671 {Basic{1, 0.5}, Basic{1, 0.6}, false}, 672 {Basic{1, 0}, Basic{2, 0}, false}, 673 {map[int]string{1: "one", 3: "two"}, map[int]string{2: "two", 1: "one"}, false}, 674 {map[int]string{1: "one", 2: "txo"}, map[int]string{2: "two", 1: "one"}, false}, 675 {map[int]string{1: "one"}, map[int]string{2: "two", 1: "one"}, false}, 676 {map[int]string{2: "two", 1: "one"}, map[int]string{1: "one"}, false}, 677 {nil, 1, false}, 678 {1, nil, false}, 679 {fn1, fn3, false}, 680 {fn3, fn3, false}, 681 682 // Nil vs empty: not the same. 683 {[]int{}, []int(nil), false}, 684 {[]int{}, []int{}, true}, 685 {[]int(nil), []int(nil), true}, 686 {map[int]int{}, map[int]int(nil), false}, 687 {map[int]int{}, map[int]int{}, true}, 688 {map[int]int(nil), map[int]int(nil), true}, 689 690 // Mismatched types 691 {1, 1.0, false}, 692 {int32(1), int64(1), false}, 693 {0.5, "hello", false}, 694 {[]int{1, 2, 3}, [3]int{1, 2, 3}, false}, 695 {&[3]interface{}{1, 2, 4}, &[3]interface{}{1, 2, "s"}, false}, 696 {Basic{1, 0.5}, NotBasic{1, 0.5}, false}, 697 {map[uint]string{1: "one", 2: "two"}, map[int]string{2: "two", 1: "one"}, false}, 698 } 699 700 func TestDeepEqual(t *testing.T) { 701 for _, test := range deepEqualTests { 702 if r := DeepEqual(test.a, test.b); r != test.eq { 703 t.Errorf("DeepEqual(%v, %v) = %v, want %v", test.a, test.b, r, test.eq) 704 } 705 } 706 } 707 708 func TestTypeOf(t *testing.T) { 709 // Special case for nil 710 if typ := TypeOf(nil); typ != nil { 711 t.Errorf("expected nil type for nil value; got %v", typ) 712 } 713 for _, test := range deepEqualTests { 714 v := ValueOf(test.a) 715 if !v.IsValid() { 716 continue 717 } 718 typ := TypeOf(test.a) 719 if typ != v.Type() { 720 t.Errorf("TypeOf(%v) = %v, but ValueOf(%v).Type() = %v", test.a, typ, test.a, v.Type()) 721 } 722 } 723 } 724 725 type Recursive struct { 726 x int 727 r *Recursive 728 } 729 730 func TestDeepEqualRecursiveStruct(t *testing.T) { 731 a, b := new(Recursive), new(Recursive) 732 *a = Recursive{12, a} 733 *b = Recursive{12, b} 734 if !DeepEqual(a, b) { 735 t.Error("DeepEqual(recursive same) = false, want true") 736 } 737 } 738 739 type _Complex struct { 740 a int 741 b [3]*_Complex 742 c *string 743 d map[float64]float64 744 } 745 746 func TestDeepEqualComplexStruct(t *testing.T) { 747 m := make(map[float64]float64) 748 stra, strb := "hello", "hello" 749 a, b := new(_Complex), new(_Complex) 750 *a = _Complex{5, [3]*_Complex{a, b, a}, &stra, m} 751 *b = _Complex{5, [3]*_Complex{b, a, a}, &strb, m} 752 if !DeepEqual(a, b) { 753 t.Error("DeepEqual(complex same) = false, want true") 754 } 755 } 756 757 func TestDeepEqualComplexStructInequality(t *testing.T) { 758 m := make(map[float64]float64) 759 stra, strb := "hello", "helloo" // Difference is here 760 a, b := new(_Complex), new(_Complex) 761 *a = _Complex{5, [3]*_Complex{a, b, a}, &stra, m} 762 *b = _Complex{5, [3]*_Complex{b, a, a}, &strb, m} 763 if DeepEqual(a, b) { 764 t.Error("DeepEqual(complex different) = true, want false") 765 } 766 } 767 768 type UnexpT struct { 769 m map[int]int 770 } 771 772 func TestDeepEqualUnexportedMap(t *testing.T) { 773 // Check that DeepEqual can look at unexported fields. 774 x1 := UnexpT{map[int]int{1: 2}} 775 x2 := UnexpT{map[int]int{1: 2}} 776 if !DeepEqual(&x1, &x2) { 777 t.Error("DeepEqual(x1, x2) = false, want true") 778 } 779 780 y1 := UnexpT{map[int]int{2: 3}} 781 if DeepEqual(&x1, &y1) { 782 t.Error("DeepEqual(x1, y1) = true, want false") 783 } 784 } 785 786 func check2ndField(x interface{}, offs uintptr, t *testing.T) { 787 s := ValueOf(x) 788 f := s.Type().Field(1) 789 if f.Offset != offs { 790 t.Error("mismatched offsets in structure alignment:", f.Offset, offs) 791 } 792 } 793 794 // Check that structure alignment & offsets viewed through reflect agree with those 795 // from the compiler itself. 796 func TestAlignment(t *testing.T) { 797 type T1inner struct { 798 a int 799 } 800 type T1 struct { 801 T1inner 802 f int 803 } 804 type T2inner struct { 805 a, b int 806 } 807 type T2 struct { 808 T2inner 809 f int 810 } 811 812 x := T1{T1inner{2}, 17} 813 check2ndField(x, uintptr(unsafe.Pointer(&x.f))-uintptr(unsafe.Pointer(&x)), t) 814 815 x1 := T2{T2inner{2, 3}, 17} 816 check2ndField(x1, uintptr(unsafe.Pointer(&x1.f))-uintptr(unsafe.Pointer(&x1)), t) 817 } 818 819 func Nil(a interface{}, t *testing.T) { 820 n := ValueOf(a).Field(0) 821 if !n.IsNil() { 822 t.Errorf("%v should be nil", a) 823 } 824 } 825 826 func NotNil(a interface{}, t *testing.T) { 827 n := ValueOf(a).Field(0) 828 if n.IsNil() { 829 t.Errorf("value of type %v should not be nil", ValueOf(a).Type().String()) 830 } 831 } 832 833 func TestIsNil(t *testing.T) { 834 // These implement IsNil. 835 // Wrap in extra struct to hide interface type. 836 doNil := []interface{}{ 837 struct{ x *int }{}, 838 struct{ x interface{} }{}, 839 struct{ x map[string]int }{}, 840 struct{ x func() bool }{}, 841 struct{ x chan int }{}, 842 struct{ x []string }{}, 843 } 844 for _, ts := range doNil { 845 ty := TypeOf(ts).Field(0).Type 846 v := Zero(ty) 847 v.IsNil() // panics if not okay to call 848 } 849 850 // Check the implementations 851 var pi struct { 852 x *int 853 } 854 Nil(pi, t) 855 pi.x = new(int) 856 NotNil(pi, t) 857 858 var si struct { 859 x []int 860 } 861 Nil(si, t) 862 si.x = make([]int, 10) 863 NotNil(si, t) 864 865 var ci struct { 866 x chan int 867 } 868 Nil(ci, t) 869 ci.x = make(chan int) 870 NotNil(ci, t) 871 872 var mi struct { 873 x map[int]int 874 } 875 Nil(mi, t) 876 mi.x = make(map[int]int) 877 NotNil(mi, t) 878 879 var ii struct { 880 x interface{} 881 } 882 Nil(ii, t) 883 ii.x = 2 884 NotNil(ii, t) 885 886 var fi struct { 887 x func(t *testing.T) 888 } 889 Nil(fi, t) 890 fi.x = TestIsNil 891 NotNil(fi, t) 892 } 893 894 func TestInterfaceExtraction(t *testing.T) { 895 var s struct { 896 W io.Writer 897 } 898 899 s.W = os.Stdout 900 v := Indirect(ValueOf(&s)).Field(0).Interface() 901 if v != s.W.(interface{}) { 902 t.Error("Interface() on interface: ", v, s.W) 903 } 904 } 905 906 func TestNilPtrValueSub(t *testing.T) { 907 var pi *int 908 if pv := ValueOf(pi); pv.Elem().IsValid() { 909 t.Error("ValueOf((*int)(nil)).Elem().IsValid()") 910 } 911 } 912 913 func TestMap(t *testing.T) { 914 m := map[string]int{"a": 1, "b": 2} 915 mv := ValueOf(m) 916 if n := mv.Len(); n != len(m) { 917 t.Errorf("Len = %d, want %d", n, len(m)) 918 } 919 keys := mv.MapKeys() 920 newmap := MakeMap(mv.Type()) 921 for k, v := range m { 922 // Check that returned Keys match keys in range. 923 // These aren't required to be in the same order. 924 seen := false 925 for _, kv := range keys { 926 if kv.String() == k { 927 seen = true 928 break 929 } 930 } 931 if !seen { 932 t.Errorf("Missing key %q", k) 933 } 934 935 // Check that value lookup is correct. 936 vv := mv.MapIndex(ValueOf(k)) 937 if vi := vv.Int(); vi != int64(v) { 938 t.Errorf("Key %q: have value %d, want %d", k, vi, v) 939 } 940 941 // Copy into new map. 942 newmap.SetMapIndex(ValueOf(k), ValueOf(v)) 943 } 944 vv := mv.MapIndex(ValueOf("not-present")) 945 if vv.IsValid() { 946 t.Errorf("Invalid key: got non-nil value %s", valueToString(vv)) 947 } 948 949 newm := newmap.Interface().(map[string]int) 950 if len(newm) != len(m) { 951 t.Errorf("length after copy: newm=%d, m=%d", len(newm), len(m)) 952 } 953 954 for k, v := range newm { 955 mv, ok := m[k] 956 if mv != v { 957 t.Errorf("newm[%q] = %d, but m[%q] = %d, %v", k, v, k, mv, ok) 958 } 959 } 960 961 newmap.SetMapIndex(ValueOf("a"), Value{}) 962 v, ok := newm["a"] 963 if ok { 964 t.Errorf("newm[\"a\"] = %d after delete", v) 965 } 966 967 mv = ValueOf(&m).Elem() 968 mv.Set(Zero(mv.Type())) 969 if m != nil { 970 t.Errorf("mv.Set(nil) failed") 971 } 972 } 973 974 func TestChan(t *testing.T) { 975 for loop := 0; loop < 2; loop++ { 976 var c chan int 977 var cv Value 978 979 // check both ways to allocate channels 980 switch loop { 981 case 1: 982 c = make(chan int, 1) 983 cv = ValueOf(c) 984 case 0: 985 cv = MakeChan(TypeOf(c), 1) 986 c = cv.Interface().(chan int) 987 } 988 989 // Send 990 cv.Send(ValueOf(2)) 991 if i := <-c; i != 2 { 992 t.Errorf("reflect Send 2, native recv %d", i) 993 } 994 995 // Recv 996 c <- 3 997 if i, ok := cv.Recv(); i.Int() != 3 || !ok { 998 t.Errorf("native send 3, reflect Recv %d, %t", i.Int(), ok) 999 } 1000 1001 // TryRecv fail 1002 val, ok := cv.TryRecv() 1003 if val.IsValid() || ok { 1004 t.Errorf("TryRecv on empty chan: %s, %t", valueToString(val), ok) 1005 } 1006 1007 // TryRecv success 1008 c <- 4 1009 val, ok = cv.TryRecv() 1010 if !val.IsValid() { 1011 t.Errorf("TryRecv on ready chan got nil") 1012 } else if i := val.Int(); i != 4 || !ok { 1013 t.Errorf("native send 4, TryRecv %d, %t", i, ok) 1014 } 1015 1016 // TrySend fail 1017 c <- 100 1018 ok = cv.TrySend(ValueOf(5)) 1019 i := <-c 1020 if ok { 1021 t.Errorf("TrySend on full chan succeeded: value %d", i) 1022 } 1023 1024 // TrySend success 1025 ok = cv.TrySend(ValueOf(6)) 1026 if !ok { 1027 t.Errorf("TrySend on empty chan failed") 1028 } else { 1029 if i = <-c; i != 6 { 1030 t.Errorf("TrySend 6, recv %d", i) 1031 } 1032 } 1033 1034 // Close 1035 c <- 123 1036 cv.Close() 1037 if i, ok := cv.Recv(); i.Int() != 123 || !ok { 1038 t.Errorf("send 123 then close; Recv %d, %t", i.Int(), ok) 1039 } 1040 if i, ok := cv.Recv(); i.Int() != 0 || ok { 1041 t.Errorf("after close Recv %d, %t", i.Int(), ok) 1042 } 1043 } 1044 1045 // check creation of unbuffered channel 1046 var c chan int 1047 cv := MakeChan(TypeOf(c), 0) 1048 c = cv.Interface().(chan int) 1049 if cv.TrySend(ValueOf(7)) { 1050 t.Errorf("TrySend on sync chan succeeded") 1051 } 1052 if v, ok := cv.TryRecv(); v.IsValid() || ok { 1053 t.Errorf("TryRecv on sync chan succeeded: isvalid=%v ok=%v", v.IsValid(), ok) 1054 } 1055 1056 // len/cap 1057 cv = MakeChan(TypeOf(c), 10) 1058 c = cv.Interface().(chan int) 1059 for i := 0; i < 3; i++ { 1060 c <- i 1061 } 1062 if l, m := cv.Len(), cv.Cap(); l != len(c) || m != cap(c) { 1063 t.Errorf("Len/Cap = %d/%d want %d/%d", l, m, len(c), cap(c)) 1064 } 1065 } 1066 1067 // caseInfo describes a single case in a select test. 1068 type caseInfo struct { 1069 desc string 1070 canSelect bool 1071 recv Value 1072 closed bool 1073 helper func() 1074 panic bool 1075 } 1076 1077 var allselect = flag.Bool("allselect", false, "exhaustive select test") 1078 1079 func TestSelect(t *testing.T) { 1080 selectWatch.once.Do(func() { go selectWatcher() }) 1081 1082 var x exhaustive 1083 nch := 0 1084 newop := func(n int, cap int) (ch, val Value) { 1085 nch++ 1086 if nch%101%2 == 1 { 1087 c := make(chan int, cap) 1088 ch = ValueOf(c) 1089 val = ValueOf(n) 1090 } else { 1091 c := make(chan string, cap) 1092 ch = ValueOf(c) 1093 val = ValueOf(fmt.Sprint(n)) 1094 } 1095 return 1096 } 1097 1098 for n := 0; x.Next(); n++ { 1099 if testing.Short() && n >= 1000 { 1100 break 1101 } 1102 if n >= 100000 && !*allselect { 1103 break 1104 } 1105 if n%100000 == 0 && testing.Verbose() { 1106 println("TestSelect", n) 1107 } 1108 var cases []SelectCase 1109 var info []caseInfo 1110 1111 // Ready send. 1112 if x.Maybe() { 1113 ch, val := newop(len(cases), 1) 1114 cases = append(cases, SelectCase{ 1115 Dir: SelectSend, 1116 Chan: ch, 1117 Send: val, 1118 }) 1119 info = append(info, caseInfo{desc: "ready send", canSelect: true}) 1120 } 1121 1122 // Ready recv. 1123 if x.Maybe() { 1124 ch, val := newop(len(cases), 1) 1125 ch.Send(val) 1126 cases = append(cases, SelectCase{ 1127 Dir: SelectRecv, 1128 Chan: ch, 1129 }) 1130 info = append(info, caseInfo{desc: "ready recv", canSelect: true, recv: val}) 1131 } 1132 1133 // Blocking send. 1134 if x.Maybe() { 1135 ch, val := newop(len(cases), 0) 1136 cases = append(cases, SelectCase{ 1137 Dir: SelectSend, 1138 Chan: ch, 1139 Send: val, 1140 }) 1141 // Let it execute? 1142 if x.Maybe() { 1143 f := func() { ch.Recv() } 1144 info = append(info, caseInfo{desc: "blocking send", helper: f}) 1145 } else { 1146 info = append(info, caseInfo{desc: "blocking send"}) 1147 } 1148 } 1149 1150 // Blocking recv. 1151 if x.Maybe() { 1152 ch, val := newop(len(cases), 0) 1153 cases = append(cases, SelectCase{ 1154 Dir: SelectRecv, 1155 Chan: ch, 1156 }) 1157 // Let it execute? 1158 if x.Maybe() { 1159 f := func() { ch.Send(val) } 1160 info = append(info, caseInfo{desc: "blocking recv", recv: val, helper: f}) 1161 } else { 1162 info = append(info, caseInfo{desc: "blocking recv"}) 1163 } 1164 } 1165 1166 // Zero Chan send. 1167 if x.Maybe() { 1168 // Maybe include value to send. 1169 var val Value 1170 if x.Maybe() { 1171 val = ValueOf(100) 1172 } 1173 cases = append(cases, SelectCase{ 1174 Dir: SelectSend, 1175 Send: val, 1176 }) 1177 info = append(info, caseInfo{desc: "zero Chan send"}) 1178 } 1179 1180 // Zero Chan receive. 1181 if x.Maybe() { 1182 cases = append(cases, SelectCase{ 1183 Dir: SelectRecv, 1184 }) 1185 info = append(info, caseInfo{desc: "zero Chan recv"}) 1186 } 1187 1188 // nil Chan send. 1189 if x.Maybe() { 1190 cases = append(cases, SelectCase{ 1191 Dir: SelectSend, 1192 Chan: ValueOf((chan int)(nil)), 1193 Send: ValueOf(101), 1194 }) 1195 info = append(info, caseInfo{desc: "nil Chan send"}) 1196 } 1197 1198 // nil Chan recv. 1199 if x.Maybe() { 1200 cases = append(cases, SelectCase{ 1201 Dir: SelectRecv, 1202 Chan: ValueOf((chan int)(nil)), 1203 }) 1204 info = append(info, caseInfo{desc: "nil Chan recv"}) 1205 } 1206 1207 // closed Chan send. 1208 if x.Maybe() { 1209 ch := make(chan int) 1210 close(ch) 1211 cases = append(cases, SelectCase{ 1212 Dir: SelectSend, 1213 Chan: ValueOf(ch), 1214 Send: ValueOf(101), 1215 }) 1216 info = append(info, caseInfo{desc: "closed Chan send", canSelect: true, panic: true}) 1217 } 1218 1219 // closed Chan recv. 1220 if x.Maybe() { 1221 ch, val := newop(len(cases), 0) 1222 ch.Close() 1223 val = Zero(val.Type()) 1224 cases = append(cases, SelectCase{ 1225 Dir: SelectRecv, 1226 Chan: ch, 1227 }) 1228 info = append(info, caseInfo{desc: "closed Chan recv", canSelect: true, closed: true, recv: val}) 1229 } 1230 1231 var helper func() // goroutine to help the select complete 1232 1233 // Add default? Must be last case here, but will permute. 1234 // Add the default if the select would otherwise 1235 // block forever, and maybe add it anyway. 1236 numCanSelect := 0 1237 canProceed := false 1238 canBlock := true 1239 canPanic := false 1240 helpers := []int{} 1241 for i, c := range info { 1242 if c.canSelect { 1243 canProceed = true 1244 canBlock = false 1245 numCanSelect++ 1246 if c.panic { 1247 canPanic = true 1248 } 1249 } else if c.helper != nil { 1250 canProceed = true 1251 helpers = append(helpers, i) 1252 } 1253 } 1254 if !canProceed || x.Maybe() { 1255 cases = append(cases, SelectCase{ 1256 Dir: SelectDefault, 1257 }) 1258 info = append(info, caseInfo{desc: "default", canSelect: canBlock}) 1259 numCanSelect++ 1260 } else if canBlock { 1261 // Select needs to communicate with another goroutine. 1262 cas := &info[helpers[x.Choose(len(helpers))]] 1263 helper = cas.helper 1264 cas.canSelect = true 1265 numCanSelect++ 1266 } 1267 1268 // Permute cases and case info. 1269 // Doing too much here makes the exhaustive loop 1270 // too exhausting, so just do two swaps. 1271 for loop := 0; loop < 2; loop++ { 1272 i := x.Choose(len(cases)) 1273 j := x.Choose(len(cases)) 1274 cases[i], cases[j] = cases[j], cases[i] 1275 info[i], info[j] = info[j], info[i] 1276 } 1277 1278 if helper != nil { 1279 // We wait before kicking off a goroutine to satisfy a blocked select. 1280 // The pause needs to be big enough to let the select block before 1281 // we run the helper, but if we lose that race once in a while it's okay: the 1282 // select will just proceed immediately. Not a big deal. 1283 // For short tests we can grow [sic] the timeout a bit without fear of taking too long 1284 pause := 10 * time.Microsecond 1285 if testing.Short() { 1286 pause = 100 * time.Microsecond 1287 } 1288 time.AfterFunc(pause, helper) 1289 } 1290 1291 // Run select. 1292 i, recv, recvOK, panicErr := runSelect(cases, info) 1293 if panicErr != nil && !canPanic { 1294 t.Fatalf("%s\npanicked unexpectedly: %v", fmtSelect(info), panicErr) 1295 } 1296 if panicErr == nil && canPanic && numCanSelect == 1 { 1297 t.Fatalf("%s\nselected #%d incorrectly (should panic)", fmtSelect(info), i) 1298 } 1299 if panicErr != nil { 1300 continue 1301 } 1302 1303 cas := info[i] 1304 if !cas.canSelect { 1305 recvStr := "" 1306 if recv.IsValid() { 1307 recvStr = fmt.Sprintf(", received %v, %v", recv.Interface(), recvOK) 1308 } 1309 t.Fatalf("%s\nselected #%d incorrectly%s", fmtSelect(info), i, recvStr) 1310 continue 1311 } 1312 if cas.panic { 1313 t.Fatalf("%s\nselected #%d incorrectly (case should panic)", fmtSelect(info), i) 1314 continue 1315 } 1316 1317 if cases[i].Dir == SelectRecv { 1318 if !recv.IsValid() { 1319 t.Fatalf("%s\nselected #%d but got %v, %v, want %v, %v", fmtSelect(info), i, recv, recvOK, cas.recv.Interface(), !cas.closed) 1320 } 1321 if !cas.recv.IsValid() { 1322 t.Fatalf("%s\nselected #%d but internal error: missing recv value", fmtSelect(info), i) 1323 } 1324 if recv.Interface() != cas.recv.Interface() || recvOK != !cas.closed { 1325 if recv.Interface() == cas.recv.Interface() && recvOK == !cas.closed { 1326 t.Fatalf("%s\nselected #%d, got %#v, %v, and DeepEqual is broken on %T", fmtSelect(info), i, recv.Interface(), recvOK, recv.Interface()) 1327 } 1328 t.Fatalf("%s\nselected #%d but got %#v, %v, want %#v, %v", fmtSelect(info), i, recv.Interface(), recvOK, cas.recv.Interface(), !cas.closed) 1329 } 1330 } else { 1331 if recv.IsValid() || recvOK { 1332 t.Fatalf("%s\nselected #%d but got %v, %v, want %v, %v", fmtSelect(info), i, recv, recvOK, Value{}, false) 1333 } 1334 } 1335 } 1336 } 1337 1338 // selectWatch and the selectWatcher are a watchdog mechanism for running Select. 1339 // If the selectWatcher notices that the select has been blocked for >1 second, it prints 1340 // an error describing the select and panics the entire test binary. 1341 var selectWatch struct { 1342 sync.Mutex 1343 once sync.Once 1344 now time.Time 1345 info []caseInfo 1346 } 1347 1348 func selectWatcher() { 1349 for { 1350 time.Sleep(1 * time.Second) 1351 selectWatch.Lock() 1352 if selectWatch.info != nil && time.Since(selectWatch.now) > 1*time.Second { 1353 fmt.Fprintf(os.Stderr, "TestSelect:\n%s blocked indefinitely\n", fmtSelect(selectWatch.info)) 1354 panic("select stuck") 1355 } 1356 selectWatch.Unlock() 1357 } 1358 } 1359 1360 // runSelect runs a single select test. 1361 // It returns the values returned by Select but also returns 1362 // a panic value if the Select panics. 1363 func runSelect(cases []SelectCase, info []caseInfo) (chosen int, recv Value, recvOK bool, panicErr interface{}) { 1364 defer func() { 1365 panicErr = recover() 1366 1367 selectWatch.Lock() 1368 selectWatch.info = nil 1369 selectWatch.Unlock() 1370 }() 1371 1372 selectWatch.Lock() 1373 selectWatch.now = time.Now() 1374 selectWatch.info = info 1375 selectWatch.Unlock() 1376 1377 chosen, recv, recvOK = Select(cases) 1378 return 1379 } 1380 1381 // fmtSelect formats the information about a single select test. 1382 func fmtSelect(info []caseInfo) string { 1383 var buf bytes.Buffer 1384 fmt.Fprintf(&buf, "\nselect {\n") 1385 for i, cas := range info { 1386 fmt.Fprintf(&buf, "%d: %s", i, cas.desc) 1387 if cas.recv.IsValid() { 1388 fmt.Fprintf(&buf, " val=%#v", cas.recv.Interface()) 1389 } 1390 if cas.canSelect { 1391 fmt.Fprintf(&buf, " canselect") 1392 } 1393 if cas.panic { 1394 fmt.Fprintf(&buf, " panic") 1395 } 1396 fmt.Fprintf(&buf, "\n") 1397 } 1398 fmt.Fprintf(&buf, "}") 1399 return buf.String() 1400 } 1401 1402 type two [2]uintptr 1403 1404 // Difficult test for function call because of 1405 // implicit padding between arguments. 1406 func dummy(b byte, c int, d byte, e two, f byte, g float32, h byte) (i byte, j int, k byte, l two, m byte, n float32, o byte) { 1407 return b, c, d, e, f, g, h 1408 } 1409 1410 func TestFunc(t *testing.T) { 1411 ret := ValueOf(dummy).Call([]Value{ 1412 ValueOf(byte(10)), 1413 ValueOf(20), 1414 ValueOf(byte(30)), 1415 ValueOf(two{40, 50}), 1416 ValueOf(byte(60)), 1417 ValueOf(float32(70)), 1418 ValueOf(byte(80)), 1419 }) 1420 if len(ret) != 7 { 1421 t.Fatalf("Call returned %d values, want 7", len(ret)) 1422 } 1423 1424 i := byte(ret[0].Uint()) 1425 j := int(ret[1].Int()) 1426 k := byte(ret[2].Uint()) 1427 l := ret[3].Interface().(two) 1428 m := byte(ret[4].Uint()) 1429 n := float32(ret[5].Float()) 1430 o := byte(ret[6].Uint()) 1431 1432 if i != 10 || j != 20 || k != 30 || l != (two{40, 50}) || m != 60 || n != 70 || o != 80 { 1433 t.Errorf("Call returned %d, %d, %d, %v, %d, %g, %d; want 10, 20, 30, [40, 50], 60, 70, 80", i, j, k, l, m, n, o) 1434 } 1435 } 1436 1437 func TestMakeFunc(t *testing.T) { 1438 f := dummy 1439 fv := MakeFunc(TypeOf(f), func(in []Value) []Value { return in }) 1440 ValueOf(&f).Elem().Set(fv) 1441 1442 // Call g with small arguments so that there is 1443 // something predictable (and different from the 1444 // correct results) in those positions on the stack. 1445 g := dummy 1446 g(1, 2, 3, two{4, 5}, 6, 7, 8) 1447 1448 // Call constructed function f. 1449 i, j, k, l, m, n, o := f(10, 20, 30, two{40, 50}, 60, 70, 80) 1450 if i != 10 || j != 20 || k != 30 || l != (two{40, 50}) || m != 60 || n != 70 || o != 80 { 1451 t.Errorf("Call returned %d, %d, %d, %v, %d, %g, %d; want 10, 20, 30, [40, 50], 60, 70, 80", i, j, k, l, m, n, o) 1452 } 1453 } 1454 1455 func TestMakeFuncInterface(t *testing.T) { 1456 fn := func(i int) int { return i } 1457 incr := func(in []Value) []Value { 1458 return []Value{ValueOf(int(in[0].Int() + 1))} 1459 } 1460 fv := MakeFunc(TypeOf(fn), incr) 1461 ValueOf(&fn).Elem().Set(fv) 1462 if r := fn(2); r != 3 { 1463 t.Errorf("Call returned %d, want 3", r) 1464 } 1465 if r := fv.Call([]Value{ValueOf(14)})[0].Int(); r != 15 { 1466 t.Errorf("Call returned %d, want 15", r) 1467 } 1468 if r := fv.Interface().(func(int) int)(26); r != 27 { 1469 t.Errorf("Call returned %d, want 27", r) 1470 } 1471 } 1472 1473 type Point struct { 1474 x, y int 1475 } 1476 1477 // This will be index 0. 1478 func (p Point) AnotherMethod(scale int) int { 1479 return -1 1480 } 1481 1482 // This will be index 1. 1483 func (p Point) Dist(scale int) int { 1484 //println("Point.Dist", p.x, p.y, scale) 1485 return p.x*p.x*scale + p.y*p.y*scale 1486 } 1487 1488 func TestMethod(t *testing.T) { 1489 // Non-curried method of type. 1490 p := Point{3, 4} 1491 i := TypeOf(p).Method(1).Func.Call([]Value{ValueOf(p), ValueOf(10)})[0].Int() 1492 if i != 250 { 1493 t.Errorf("Type Method returned %d; want 250", i) 1494 } 1495 1496 m, ok := TypeOf(p).MethodByName("Dist") 1497 if !ok { 1498 t.Fatalf("method by name failed") 1499 } 1500 i = m.Func.Call([]Value{ValueOf(p), ValueOf(11)})[0].Int() 1501 if i != 275 { 1502 t.Errorf("Type MethodByName returned %d; want 275", i) 1503 } 1504 1505 i = TypeOf(&p).Method(1).Func.Call([]Value{ValueOf(&p), ValueOf(12)})[0].Int() 1506 if i != 300 { 1507 t.Errorf("Pointer Type Method returned %d; want 300", i) 1508 } 1509 1510 m, ok = TypeOf(&p).MethodByName("Dist") 1511 if !ok { 1512 t.Fatalf("ptr method by name failed") 1513 } 1514 i = m.Func.Call([]Value{ValueOf(&p), ValueOf(13)})[0].Int() 1515 if i != 325 { 1516 t.Errorf("Pointer Type MethodByName returned %d; want 325", i) 1517 } 1518 1519 // Curried method of value. 1520 tfunc := TypeOf((func(int) int)(nil)) 1521 v := ValueOf(p).Method(1) 1522 if tt := v.Type(); tt != tfunc { 1523 t.Errorf("Value Method Type is %s; want %s", tt, tfunc) 1524 } 1525 i = v.Call([]Value{ValueOf(14)})[0].Int() 1526 if i != 350 { 1527 t.Errorf("Value Method returned %d; want 350", i) 1528 } 1529 v = ValueOf(p).MethodByName("Dist") 1530 if tt := v.Type(); tt != tfunc { 1531 t.Errorf("Value MethodByName Type is %s; want %s", tt, tfunc) 1532 } 1533 i = v.Call([]Value{ValueOf(15)})[0].Int() 1534 if i != 375 { 1535 t.Errorf("Value MethodByName returned %d; want 375", i) 1536 } 1537 1538 // Curried method of pointer. 1539 v = ValueOf(&p).Method(1) 1540 if tt := v.Type(); tt != tfunc { 1541 t.Errorf("Pointer Value Method Type is %s; want %s", tt, tfunc) 1542 } 1543 i = v.Call([]Value{ValueOf(16)})[0].Int() 1544 if i != 400 { 1545 t.Errorf("Pointer Value Method returned %d; want 400", i) 1546 } 1547 v = ValueOf(&p).MethodByName("Dist") 1548 if tt := v.Type(); tt != tfunc { 1549 t.Errorf("Pointer Value MethodByName Type is %s; want %s", tt, tfunc) 1550 } 1551 i = v.Call([]Value{ValueOf(17)})[0].Int() 1552 if i != 425 { 1553 t.Errorf("Pointer Value MethodByName returned %d; want 425", i) 1554 } 1555 1556 // Curried method of interface value. 1557 // Have to wrap interface value in a struct to get at it. 1558 // Passing it to ValueOf directly would 1559 // access the underlying Point, not the interface. 1560 var x interface { 1561 Dist(int) int 1562 } = p 1563 pv := ValueOf(&x).Elem() 1564 v = pv.Method(0) 1565 if tt := v.Type(); tt != tfunc { 1566 t.Errorf("Interface Method Type is %s; want %s", tt, tfunc) 1567 } 1568 i = v.Call([]Value{ValueOf(18)})[0].Int() 1569 if i != 450 { 1570 t.Errorf("Interface Method returned %d; want 450", i) 1571 } 1572 v = pv.MethodByName("Dist") 1573 if tt := v.Type(); tt != tfunc { 1574 t.Errorf("Interface MethodByName Type is %s; want %s", tt, tfunc) 1575 } 1576 i = v.Call([]Value{ValueOf(19)})[0].Int() 1577 if i != 475 { 1578 t.Errorf("Interface MethodByName returned %d; want 475", i) 1579 } 1580 } 1581 1582 func TestMethodValue(t *testing.T) { 1583 p := Point{3, 4} 1584 var i int64 1585 1586 // Curried method of value. 1587 tfunc := TypeOf((func(int) int)(nil)) 1588 v := ValueOf(p).Method(1) 1589 if tt := v.Type(); tt != tfunc { 1590 t.Errorf("Value Method Type is %s; want %s", tt, tfunc) 1591 } 1592 i = ValueOf(v.Interface()).Call([]Value{ValueOf(10)})[0].Int() 1593 if i != 250 { 1594 t.Errorf("Value Method returned %d; want 250", i) 1595 } 1596 v = ValueOf(p).MethodByName("Dist") 1597 if tt := v.Type(); tt != tfunc { 1598 t.Errorf("Value MethodByName Type is %s; want %s", tt, tfunc) 1599 } 1600 i = ValueOf(v.Interface()).Call([]Value{ValueOf(11)})[0].Int() 1601 if i != 275 { 1602 t.Errorf("Value MethodByName returned %d; want 275", i) 1603 } 1604 1605 // Curried method of pointer. 1606 v = ValueOf(&p).Method(1) 1607 if tt := v.Type(); tt != tfunc { 1608 t.Errorf("Pointer Value Method Type is %s; want %s", tt, tfunc) 1609 } 1610 i = ValueOf(v.Interface()).Call([]Value{ValueOf(12)})[0].Int() 1611 if i != 300 { 1612 t.Errorf("Pointer Value Method returned %d; want 300", i) 1613 } 1614 v = ValueOf(&p).MethodByName("Dist") 1615 if tt := v.Type(); tt != tfunc { 1616 t.Errorf("Pointer Value MethodByName Type is %s; want %s", tt, tfunc) 1617 } 1618 i = ValueOf(v.Interface()).Call([]Value{ValueOf(13)})[0].Int() 1619 if i != 325 { 1620 t.Errorf("Pointer Value MethodByName returned %d; want 325", i) 1621 } 1622 1623 // Curried method of pointer to pointer. 1624 pp := &p 1625 v = ValueOf(&pp).Elem().Method(1) 1626 if tt := v.Type(); tt != tfunc { 1627 t.Errorf("Pointer Pointer Value Method Type is %s; want %s", tt, tfunc) 1628 } 1629 i = ValueOf(v.Interface()).Call([]Value{ValueOf(14)})[0].Int() 1630 if i != 350 { 1631 t.Errorf("Pointer Pointer Value Method returned %d; want 350", i) 1632 } 1633 v = ValueOf(&pp).Elem().MethodByName("Dist") 1634 if tt := v.Type(); tt != tfunc { 1635 t.Errorf("Pointer Pointer Value MethodByName Type is %s; want %s", tt, tfunc) 1636 } 1637 i = ValueOf(v.Interface()).Call([]Value{ValueOf(15)})[0].Int() 1638 if i != 375 { 1639 t.Errorf("Pointer Pointer Value MethodByName returned %d; want 375", i) 1640 } 1641 1642 // Curried method of interface value. 1643 // Have to wrap interface value in a struct to get at it. 1644 // Passing it to ValueOf directly would 1645 // access the underlying Point, not the interface. 1646 var s = struct { 1647 X interface { 1648 Dist(int) int 1649 } 1650 }{p} 1651 pv := ValueOf(s).Field(0) 1652 v = pv.Method(0) 1653 if tt := v.Type(); tt != tfunc { 1654 t.Errorf("Interface Method Type is %s; want %s", tt, tfunc) 1655 } 1656 i = ValueOf(v.Interface()).Call([]Value{ValueOf(16)})[0].Int() 1657 if i != 400 { 1658 t.Errorf("Interface Method returned %d; want 400", i) 1659 } 1660 v = pv.MethodByName("Dist") 1661 if tt := v.Type(); tt != tfunc { 1662 t.Errorf("Interface MethodByName Type is %s; want %s", tt, tfunc) 1663 } 1664 i = ValueOf(v.Interface()).Call([]Value{ValueOf(17)})[0].Int() 1665 if i != 425 { 1666 t.Errorf("Interface MethodByName returned %d; want 425", i) 1667 } 1668 } 1669 1670 // Reflect version of $GOROOT/test/method5.go 1671 1672 // Concrete types implementing M method. 1673 // Smaller than a word, word-sized, larger than a word. 1674 // Value and pointer receivers. 1675 1676 type Tinter interface { 1677 M(int, byte) (byte, int) 1678 } 1679 1680 type Tsmallv byte 1681 1682 func (v Tsmallv) M(x int, b byte) (byte, int) { return b, x + int(v) } 1683 1684 type Tsmallp byte 1685 1686 func (p *Tsmallp) M(x int, b byte) (byte, int) { return b, x + int(*p) } 1687 1688 type Twordv uintptr 1689 1690 func (v Twordv) M(x int, b byte) (byte, int) { return b, x + int(v) } 1691 1692 type Twordp uintptr 1693 1694 func (p *Twordp) M(x int, b byte) (byte, int) { return b, x + int(*p) } 1695 1696 type Tbigv [2]uintptr 1697 1698 func (v Tbigv) M(x int, b byte) (byte, int) { return b, x + int(v[0]) + int(v[1]) } 1699 1700 type Tbigp [2]uintptr 1701 1702 func (p *Tbigp) M(x int, b byte) (byte, int) { return b, x + int(p[0]) + int(p[1]) } 1703 1704 // Again, with an unexported method. 1705 1706 type tsmallv byte 1707 1708 func (v tsmallv) m(x int, b byte) (byte, int) { return b, x + int(v) } 1709 1710 type tsmallp byte 1711 1712 func (p *tsmallp) m(x int, b byte) (byte, int) { return b, x + int(*p) } 1713 1714 type twordv uintptr 1715 1716 func (v twordv) m(x int, b byte) (byte, int) { return b, x + int(v) } 1717 1718 type twordp uintptr 1719 1720 func (p *twordp) m(x int, b byte) (byte, int) { return b, x + int(*p) } 1721 1722 type tbigv [2]uintptr 1723 1724 func (v tbigv) m(x int, b byte) (byte, int) { return b, x + int(v[0]) + int(v[1]) } 1725 1726 type tbigp [2]uintptr 1727 1728 func (p *tbigp) m(x int, b byte) (byte, int) { return b, x + int(p[0]) + int(p[1]) } 1729 1730 type tinter interface { 1731 m(int, byte) (byte, int) 1732 } 1733 1734 // Embedding via pointer. 1735 1736 type Tm1 struct { 1737 Tm2 1738 } 1739 1740 type Tm2 struct { 1741 *Tm3 1742 } 1743 1744 type Tm3 struct { 1745 *Tm4 1746 } 1747 1748 type Tm4 struct { 1749 } 1750 1751 func (t4 Tm4) M(x int, b byte) (byte, int) { return b, x + 40 } 1752 1753 func TestMethod5(t *testing.T) { 1754 CheckF := func(name string, f func(int, byte) (byte, int), inc int) { 1755 b, x := f(1000, 99) 1756 if b != 99 || x != 1000+inc { 1757 t.Errorf("%s(1000, 99) = %v, %v, want 99, %v", name, b, x, 1000+inc) 1758 } 1759 } 1760 1761 CheckV := func(name string, i Value, inc int) { 1762 bx := i.Method(0).Call([]Value{ValueOf(1000), ValueOf(byte(99))}) 1763 b := bx[0].Interface() 1764 x := bx[1].Interface() 1765 if b != byte(99) || x != 1000+inc { 1766 t.Errorf("direct %s.M(1000, 99) = %v, %v, want 99, %v", name, b, x, 1000+inc) 1767 } 1768 1769 CheckF(name+".M", i.Method(0).Interface().(func(int, byte) (byte, int)), inc) 1770 } 1771 1772 var TinterType = TypeOf(new(Tinter)).Elem() 1773 var tinterType = TypeOf(new(tinter)).Elem() 1774 1775 CheckI := func(name string, i interface{}, inc int) { 1776 v := ValueOf(i) 1777 CheckV(name, v, inc) 1778 CheckV("(i="+name+")", v.Convert(TinterType), inc) 1779 } 1780 1781 sv := Tsmallv(1) 1782 CheckI("sv", sv, 1) 1783 CheckI("&sv", &sv, 1) 1784 1785 sp := Tsmallp(2) 1786 CheckI("&sp", &sp, 2) 1787 1788 wv := Twordv(3) 1789 CheckI("wv", wv, 3) 1790 CheckI("&wv", &wv, 3) 1791 1792 wp := Twordp(4) 1793 CheckI("&wp", &wp, 4) 1794 1795 bv := Tbigv([2]uintptr{5, 6}) 1796 CheckI("bv", bv, 11) 1797 CheckI("&bv", &bv, 11) 1798 1799 bp := Tbigp([2]uintptr{7, 8}) 1800 CheckI("&bp", &bp, 15) 1801 1802 t4 := Tm4{} 1803 t3 := Tm3{&t4} 1804 t2 := Tm2{&t3} 1805 t1 := Tm1{t2} 1806 CheckI("t4", t4, 40) 1807 CheckI("&t4", &t4, 40) 1808 CheckI("t3", t3, 40) 1809 CheckI("&t3", &t3, 40) 1810 CheckI("t2", t2, 40) 1811 CheckI("&t2", &t2, 40) 1812 CheckI("t1", t1, 40) 1813 CheckI("&t1", &t1, 40) 1814 1815 methodShouldPanic := func(name string, i interface{}) { 1816 v := ValueOf(i) 1817 m := v.Method(0) 1818 shouldPanic(func() { m.Call([]Value{ValueOf(1000), ValueOf(byte(99))}) }) 1819 shouldPanic(func() { m.Interface() }) 1820 1821 v = v.Convert(tinterType) 1822 m = v.Method(0) 1823 shouldPanic(func() { m.Call([]Value{ValueOf(1000), ValueOf(byte(99))}) }) 1824 shouldPanic(func() { m.Interface() }) 1825 } 1826 1827 _sv := tsmallv(1) 1828 methodShouldPanic("_sv", _sv) 1829 methodShouldPanic("&_sv", &_sv) 1830 1831 _sp := tsmallp(2) 1832 methodShouldPanic("&_sp", &_sp) 1833 1834 _wv := twordv(3) 1835 methodShouldPanic("_wv", _wv) 1836 methodShouldPanic("&_wv", &_wv) 1837 1838 _wp := twordp(4) 1839 methodShouldPanic("&_wp", &_wp) 1840 1841 _bv := tbigv([2]uintptr{5, 6}) 1842 methodShouldPanic("_bv", _bv) 1843 methodShouldPanic("&_bv", &_bv) 1844 1845 _bp := tbigp([2]uintptr{7, 8}) 1846 methodShouldPanic("&_bp", &_bp) 1847 1848 var tnil Tinter 1849 vnil := ValueOf(&tnil).Elem() 1850 shouldPanic(func() { vnil.Method(0) }) 1851 } 1852 1853 func TestInterfaceSet(t *testing.T) { 1854 p := &Point{3, 4} 1855 1856 var s struct { 1857 I interface{} 1858 P interface { 1859 Dist(int) int 1860 } 1861 } 1862 sv := ValueOf(&s).Elem() 1863 sv.Field(0).Set(ValueOf(p)) 1864 if q := s.I.(*Point); q != p { 1865 t.Errorf("i: have %p want %p", q, p) 1866 } 1867 1868 pv := sv.Field(1) 1869 pv.Set(ValueOf(p)) 1870 if q := s.P.(*Point); q != p { 1871 t.Errorf("i: have %p want %p", q, p) 1872 } 1873 1874 i := pv.Method(0).Call([]Value{ValueOf(10)})[0].Int() 1875 if i != 250 { 1876 t.Errorf("Interface Method returned %d; want 250", i) 1877 } 1878 } 1879 1880 type T1 struct { 1881 a string 1882 int 1883 } 1884 1885 func TestAnonymousFields(t *testing.T) { 1886 var field StructField 1887 var ok bool 1888 var t1 T1 1889 type1 := TypeOf(t1) 1890 if field, ok = type1.FieldByName("int"); !ok { 1891 t.Fatal("no field 'int'") 1892 } 1893 if field.Index[0] != 1 { 1894 t.Error("field index should be 1; is", field.Index) 1895 } 1896 } 1897 1898 type FTest struct { 1899 s interface{} 1900 name string 1901 index []int 1902 value int 1903 } 1904 1905 type D1 struct { 1906 d int 1907 } 1908 type D2 struct { 1909 d int 1910 } 1911 1912 type S0 struct { 1913 A, B, C int 1914 D1 1915 D2 1916 } 1917 1918 type S1 struct { 1919 B int 1920 S0 1921 } 1922 1923 type S2 struct { 1924 A int 1925 *S1 1926 } 1927 1928 type S1x struct { 1929 S1 1930 } 1931 1932 type S1y struct { 1933 S1 1934 } 1935 1936 type S3 struct { 1937 S1x 1938 S2 1939 D, E int 1940 *S1y 1941 } 1942 1943 type S4 struct { 1944 *S4 1945 A int 1946 } 1947 1948 // The X in S6 and S7 annihilate, but they also block the X in S8.S9. 1949 type S5 struct { 1950 S6 1951 S7 1952 S8 1953 } 1954 1955 type S6 struct { 1956 X int 1957 } 1958 1959 type S7 S6 1960 1961 type S8 struct { 1962 S9 1963 } 1964 1965 type S9 struct { 1966 X int 1967 Y int 1968 } 1969 1970 // The X in S11.S6 and S12.S6 annihilate, but they also block the X in S13.S8.S9. 1971 type S10 struct { 1972 S11 1973 S12 1974 S13 1975 } 1976 1977 type S11 struct { 1978 S6 1979 } 1980 1981 type S12 struct { 1982 S6 1983 } 1984 1985 type S13 struct { 1986 S8 1987 } 1988 1989 // The X in S15.S11.S1 and S16.S11.S1 annihilate. 1990 type S14 struct { 1991 S15 1992 S16 1993 } 1994 1995 type S15 struct { 1996 S11 1997 } 1998 1999 type S16 struct { 2000 S11 2001 } 2002 2003 var fieldTests = []FTest{ 2004 {struct{}{}, "", nil, 0}, 2005 {struct{}{}, "Foo", nil, 0}, 2006 {S0{A: 'a'}, "A", []int{0}, 'a'}, 2007 {S0{}, "D", nil, 0}, 2008 {S1{S0: S0{A: 'a'}}, "A", []int{1, 0}, 'a'}, 2009 {S1{B: 'b'}, "B", []int{0}, 'b'}, 2010 {S1{}, "S0", []int{1}, 0}, 2011 {S1{S0: S0{C: 'c'}}, "C", []int{1, 2}, 'c'}, 2012 {S2{A: 'a'}, "A", []int{0}, 'a'}, 2013 {S2{}, "S1", []int{1}, 0}, 2014 {S2{S1: &S1{B: 'b'}}, "B", []int{1, 0}, 'b'}, 2015 {S2{S1: &S1{S0: S0{C: 'c'}}}, "C", []int{1, 1, 2}, 'c'}, 2016 {S2{}, "D", nil, 0}, 2017 {S3{}, "S1", nil, 0}, 2018 {S3{S2: S2{A: 'a'}}, "A", []int{1, 0}, 'a'}, 2019 {S3{}, "B", nil, 0}, 2020 {S3{D: 'd'}, "D", []int{2}, 0}, 2021 {S3{E: 'e'}, "E", []int{3}, 'e'}, 2022 {S4{A: 'a'}, "A", []int{1}, 'a'}, 2023 {S4{}, "B", nil, 0}, 2024 {S5{}, "X", nil, 0}, 2025 {S5{}, "Y", []int{2, 0, 1}, 0}, 2026 {S10{}, "X", nil, 0}, 2027 {S10{}, "Y", []int{2, 0, 0, 1}, 0}, 2028 {S14{}, "X", nil, 0}, 2029 } 2030 2031 func TestFieldByIndex(t *testing.T) { 2032 for _, test := range fieldTests { 2033 s := TypeOf(test.s) 2034 f := s.FieldByIndex(test.index) 2035 if f.Name != "" { 2036 if test.index != nil { 2037 if f.Name != test.name { 2038 t.Errorf("%s.%s found; want %s", s.Name(), f.Name, test.name) 2039 } 2040 } else { 2041 t.Errorf("%s.%s found", s.Name(), f.Name) 2042 } 2043 } else if len(test.index) > 0 { 2044 t.Errorf("%s.%s not found", s.Name(), test.name) 2045 } 2046 2047 if test.value != 0 { 2048 v := ValueOf(test.s).FieldByIndex(test.index) 2049 if v.IsValid() { 2050 if x, ok := v.Interface().(int); ok { 2051 if x != test.value { 2052 t.Errorf("%s%v is %d; want %d", s.Name(), test.index, x, test.value) 2053 } 2054 } else { 2055 t.Errorf("%s%v value not an int", s.Name(), test.index) 2056 } 2057 } else { 2058 t.Errorf("%s%v value not found", s.Name(), test.index) 2059 } 2060 } 2061 } 2062 } 2063 2064 func TestFieldByName(t *testing.T) { 2065 for _, test := range fieldTests { 2066 s := TypeOf(test.s) 2067 f, found := s.FieldByName(test.name) 2068 if found { 2069 if test.index != nil { 2070 // Verify field depth and index. 2071 if len(f.Index) != len(test.index) { 2072 t.Errorf("%s.%s depth %d; want %d: %v vs %v", s.Name(), test.name, len(f.Index), len(test.index), f.Index, test.index) 2073 } else { 2074 for i, x := range f.Index { 2075 if x != test.index[i] { 2076 t.Errorf("%s.%s.Index[%d] is %d; want %d", s.Name(), test.name, i, x, test.index[i]) 2077 } 2078 } 2079 } 2080 } else { 2081 t.Errorf("%s.%s found", s.Name(), f.Name) 2082 } 2083 } else if len(test.index) > 0 { 2084 t.Errorf("%s.%s not found", s.Name(), test.name) 2085 } 2086 2087 if test.value != 0 { 2088 v := ValueOf(test.s).FieldByName(test.name) 2089 if v.IsValid() { 2090 if x, ok := v.Interface().(int); ok { 2091 if x != test.value { 2092 t.Errorf("%s.%s is %d; want %d", s.Name(), test.name, x, test.value) 2093 } 2094 } else { 2095 t.Errorf("%s.%s value not an int", s.Name(), test.name) 2096 } 2097 } else { 2098 t.Errorf("%s.%s value not found", s.Name(), test.name) 2099 } 2100 } 2101 } 2102 } 2103 2104 func TestImportPath(t *testing.T) { 2105 tests := []struct { 2106 t Type 2107 path string 2108 }{ 2109 {TypeOf(&base64.Encoding{}).Elem(), "encoding/base64"}, 2110 {TypeOf(int(0)), ""}, 2111 {TypeOf(int8(0)), ""}, 2112 {TypeOf(int16(0)), ""}, 2113 {TypeOf(int32(0)), ""}, 2114 {TypeOf(int64(0)), ""}, 2115 {TypeOf(uint(0)), ""}, 2116 {TypeOf(uint8(0)), ""}, 2117 {TypeOf(uint16(0)), ""}, 2118 {TypeOf(uint32(0)), ""}, 2119 {TypeOf(uint64(0)), ""}, 2120 {TypeOf(uintptr(0)), ""}, 2121 {TypeOf(float32(0)), ""}, 2122 {TypeOf(float64(0)), ""}, 2123 {TypeOf(complex64(0)), ""}, 2124 {TypeOf(complex128(0)), ""}, 2125 {TypeOf(byte(0)), ""}, 2126 {TypeOf(rune(0)), ""}, 2127 {TypeOf([]byte(nil)), ""}, 2128 {TypeOf([]rune(nil)), ""}, 2129 {TypeOf(string("")), ""}, 2130 {TypeOf((*interface{})(nil)).Elem(), ""}, 2131 {TypeOf((*byte)(nil)), ""}, 2132 {TypeOf((*rune)(nil)), ""}, 2133 {TypeOf((*int64)(nil)), ""}, 2134 {TypeOf(map[string]int{}), ""}, 2135 {TypeOf((*error)(nil)).Elem(), ""}, 2136 } 2137 for _, test := range tests { 2138 if path := test.t.PkgPath(); path != test.path { 2139 t.Errorf("%v.PkgPath() = %q, want %q", test.t, path, test.path) 2140 } 2141 } 2142 } 2143 2144 func TestVariadicType(t *testing.T) { 2145 // Test example from Type documentation. 2146 var f func(x int, y ...float64) 2147 typ := TypeOf(f) 2148 if typ.NumIn() == 2 && typ.In(0) == TypeOf(int(0)) { 2149 sl := typ.In(1) 2150 if sl.Kind() == Slice { 2151 if sl.Elem() == TypeOf(0.0) { 2152 // ok 2153 return 2154 } 2155 } 2156 } 2157 2158 // Failed 2159 t.Errorf("want NumIn() = 2, In(0) = int, In(1) = []float64") 2160 s := fmt.Sprintf("have NumIn() = %d", typ.NumIn()) 2161 for i := 0; i < typ.NumIn(); i++ { 2162 s += fmt.Sprintf(", In(%d) = %s", i, typ.In(i)) 2163 } 2164 t.Error(s) 2165 } 2166 2167 type inner struct { 2168 x int 2169 } 2170 2171 type outer struct { 2172 y int 2173 inner 2174 } 2175 2176 func (*inner) m() {} 2177 func (*outer) m() {} 2178 2179 func TestNestedMethods(t *testing.T) { 2180 typ := TypeOf((*outer)(nil)) 2181 if typ.NumMethod() != 1 || typ.Method(0).Func.Pointer() != ValueOf((*outer).m).Pointer() { 2182 t.Errorf("Wrong method table for outer: (m=%p)", (*outer).m) 2183 for i := 0; i < typ.NumMethod(); i++ { 2184 m := typ.Method(i) 2185 t.Errorf("\t%d: %s %#x\n", i, m.Name, m.Func.Pointer()) 2186 } 2187 } 2188 } 2189 2190 type InnerInt struct { 2191 X int 2192 } 2193 2194 type OuterInt struct { 2195 Y int 2196 InnerInt 2197 } 2198 2199 func (i *InnerInt) M() int { 2200 return i.X 2201 } 2202 2203 func TestEmbeddedMethods(t *testing.T) { 2204 typ := TypeOf((*OuterInt)(nil)) 2205 if typ.NumMethod() != 1 || typ.Method(0).Func.Pointer() != ValueOf((*OuterInt).M).Pointer() { 2206 t.Errorf("Wrong method table for OuterInt: (m=%p)", (*OuterInt).M) 2207 for i := 0; i < typ.NumMethod(); i++ { 2208 m := typ.Method(i) 2209 t.Errorf("\t%d: %s %#x\n", i, m.Name, m.Func.Pointer()) 2210 } 2211 } 2212 2213 i := &InnerInt{3} 2214 if v := ValueOf(i).Method(0).Call(nil)[0].Int(); v != 3 { 2215 t.Errorf("i.M() = %d, want 3", v) 2216 } 2217 2218 o := &OuterInt{1, InnerInt{2}} 2219 if v := ValueOf(o).Method(0).Call(nil)[0].Int(); v != 2 { 2220 t.Errorf("i.M() = %d, want 2", v) 2221 } 2222 2223 f := (*OuterInt).M 2224 if v := f(o); v != 2 { 2225 t.Errorf("f(o) = %d, want 2", v) 2226 } 2227 } 2228 2229 func TestPtrTo(t *testing.T) { 2230 var i int 2231 2232 typ := TypeOf(i) 2233 for i = 0; i < 100; i++ { 2234 typ = PtrTo(typ) 2235 } 2236 for i = 0; i < 100; i++ { 2237 typ = typ.Elem() 2238 } 2239 if typ != TypeOf(i) { 2240 t.Errorf("after 100 PtrTo and Elem, have %s, want %s", typ, TypeOf(i)) 2241 } 2242 } 2243 2244 func TestPtrToGC(t *testing.T) { 2245 type T *uintptr 2246 tt := TypeOf(T(nil)) 2247 pt := PtrTo(tt) 2248 const n = 100 2249 var x []interface{} 2250 for i := 0; i < n; i++ { 2251 v := New(pt) 2252 p := new(*uintptr) 2253 *p = new(uintptr) 2254 **p = uintptr(i) 2255 v.Elem().Set(ValueOf(p).Convert(pt)) 2256 x = append(x, v.Interface()) 2257 } 2258 runtime.GC() 2259 2260 for i, xi := range x { 2261 k := ValueOf(xi).Elem().Elem().Elem().Interface().(uintptr) 2262 if k != uintptr(i) { 2263 t.Errorf("lost x[%d] = %d, want %d", i, k, i) 2264 } 2265 } 2266 } 2267 2268 func TestAddr(t *testing.T) { 2269 var p struct { 2270 X, Y int 2271 } 2272 2273 v := ValueOf(&p) 2274 v = v.Elem() 2275 v = v.Addr() 2276 v = v.Elem() 2277 v = v.Field(0) 2278 v.SetInt(2) 2279 if p.X != 2 { 2280 t.Errorf("Addr.Elem.Set failed to set value") 2281 } 2282 2283 // Again but take address of the ValueOf value. 2284 // Exercises generation of PtrTypes not present in the binary. 2285 q := &p 2286 v = ValueOf(&q).Elem() 2287 v = v.Addr() 2288 v = v.Elem() 2289 v = v.Elem() 2290 v = v.Addr() 2291 v = v.Elem() 2292 v = v.Field(0) 2293 v.SetInt(3) 2294 if p.X != 3 { 2295 t.Errorf("Addr.Elem.Set failed to set value") 2296 } 2297 2298 // Starting without pointer we should get changed value 2299 // in interface. 2300 qq := p 2301 v = ValueOf(&qq).Elem() 2302 v0 := v 2303 v = v.Addr() 2304 v = v.Elem() 2305 v = v.Field(0) 2306 v.SetInt(4) 2307 if p.X != 3 { // should be unchanged from last time 2308 t.Errorf("somehow value Set changed original p") 2309 } 2310 p = v0.Interface().(struct { 2311 X, Y int 2312 }) 2313 if p.X != 4 { 2314 t.Errorf("Addr.Elem.Set valued to set value in top value") 2315 } 2316 2317 // Verify that taking the address of a type gives us a pointer 2318 // which we can convert back using the usual interface 2319 // notation. 2320 var s struct { 2321 B *bool 2322 } 2323 ps := ValueOf(&s).Elem().Field(0).Addr().Interface() 2324 *(ps.(**bool)) = new(bool) 2325 if s.B == nil { 2326 t.Errorf("Addr.Interface direct assignment failed") 2327 } 2328 } 2329 2330 func noAlloc(t *testing.T, n int, f func(int)) { 2331 if testing.Short() { 2332 t.Skip("skipping malloc count in short mode") 2333 } 2334 if runtime.GOMAXPROCS(0) > 1 { 2335 t.Skip("skipping; GOMAXPROCS>1") 2336 } 2337 i := -1 2338 allocs := testing.AllocsPerRun(n, func() { 2339 f(i) 2340 i++ 2341 }) 2342 if allocs > 0 { 2343 t.Errorf("%d iterations: got %v mallocs, want 0", n, allocs) 2344 } 2345 } 2346 2347 func TestAllocations(t *testing.T) { 2348 noAlloc(t, 100, func(j int) { 2349 var i interface{} 2350 var v Value 2351 i = 42 + j 2352 v = ValueOf(i) 2353 if int(v.Int()) != 42+j { 2354 panic("wrong int") 2355 } 2356 }) 2357 } 2358 2359 func TestSmallNegativeInt(t *testing.T) { 2360 i := int16(-1) 2361 v := ValueOf(i) 2362 if v.Int() != -1 { 2363 t.Errorf("int16(-1).Int() returned %v", v.Int()) 2364 } 2365 } 2366 2367 func TestIndex(t *testing.T) { 2368 xs := []byte{1, 2, 3, 4, 5, 6, 7, 8} 2369 v := ValueOf(xs).Index(3).Interface().(byte) 2370 if v != xs[3] { 2371 t.Errorf("xs.Index(3) = %v; expected %v", v, xs[3]) 2372 } 2373 xa := [8]byte{10, 20, 30, 40, 50, 60, 70, 80} 2374 v = ValueOf(xa).Index(2).Interface().(byte) 2375 if v != xa[2] { 2376 t.Errorf("xa.Index(2) = %v; expected %v", v, xa[2]) 2377 } 2378 s := "0123456789" 2379 v = ValueOf(s).Index(3).Interface().(byte) 2380 if v != s[3] { 2381 t.Errorf("s.Index(3) = %v; expected %v", v, s[3]) 2382 } 2383 } 2384 2385 func TestSlice(t *testing.T) { 2386 xs := []int{1, 2, 3, 4, 5, 6, 7, 8} 2387 v := ValueOf(xs).Slice(3, 5).Interface().([]int) 2388 if len(v) != 2 { 2389 t.Errorf("len(xs.Slice(3, 5)) = %d", len(v)) 2390 } 2391 if cap(v) != 5 { 2392 t.Errorf("cap(xs.Slice(3, 5)) = %d", cap(v)) 2393 } 2394 if !DeepEqual(v[0:5], xs[3:]) { 2395 t.Errorf("xs.Slice(3, 5)[0:5] = %v", v[0:5]) 2396 } 2397 xa := [8]int{10, 20, 30, 40, 50, 60, 70, 80} 2398 v = ValueOf(&xa).Elem().Slice(2, 5).Interface().([]int) 2399 if len(v) != 3 { 2400 t.Errorf("len(xa.Slice(2, 5)) = %d", len(v)) 2401 } 2402 if cap(v) != 6 { 2403 t.Errorf("cap(xa.Slice(2, 5)) = %d", cap(v)) 2404 } 2405 if !DeepEqual(v[0:6], xa[2:]) { 2406 t.Errorf("xs.Slice(2, 5)[0:6] = %v", v[0:6]) 2407 } 2408 s := "0123456789" 2409 vs := ValueOf(s).Slice(3, 5).Interface().(string) 2410 if vs != s[3:5] { 2411 t.Errorf("s.Slice(3, 5) = %q; expected %q", vs, s[3:5]) 2412 } 2413 } 2414 2415 func TestSlice3(t *testing.T) { 2416 xs := []int{1, 2, 3, 4, 5, 6, 7, 8} 2417 v := ValueOf(xs).Slice3(3, 5, 7).Interface().([]int) 2418 if len(v) != 2 { 2419 t.Errorf("len(xs.Slice3(3, 5, 7)) = %d", len(v)) 2420 } 2421 if cap(v) != 4 { 2422 t.Errorf("cap(xs.Slice3(3, 5, 7)) = %d", cap(v)) 2423 } 2424 if !DeepEqual(v[0:4], xs[3:7:7]) { 2425 t.Errorf("xs.Slice3(3, 5, 7)[0:4] = %v", v[0:4]) 2426 } 2427 rv := ValueOf(&xs).Elem() 2428 shouldPanic(func() { rv.Slice3(1, 2, 1) }) 2429 shouldPanic(func() { rv.Slice3(1, 1, 11) }) 2430 shouldPanic(func() { rv.Slice3(2, 2, 1) }) 2431 2432 xa := [8]int{10, 20, 30, 40, 50, 60, 70, 80} 2433 v = ValueOf(&xa).Elem().Slice3(2, 5, 6).Interface().([]int) 2434 if len(v) != 3 { 2435 t.Errorf("len(xa.Slice(2, 5, 6)) = %d", len(v)) 2436 } 2437 if cap(v) != 4 { 2438 t.Errorf("cap(xa.Slice(2, 5, 6)) = %d", cap(v)) 2439 } 2440 if !DeepEqual(v[0:4], xa[2:6:6]) { 2441 t.Errorf("xs.Slice(2, 5, 6)[0:4] = %v", v[0:4]) 2442 } 2443 rv = ValueOf(&xa).Elem() 2444 shouldPanic(func() { rv.Slice3(1, 2, 1) }) 2445 shouldPanic(func() { rv.Slice3(1, 1, 11) }) 2446 shouldPanic(func() { rv.Slice3(2, 2, 1) }) 2447 2448 s := "hello world" 2449 rv = ValueOf(&s).Elem() 2450 shouldPanic(func() { rv.Slice3(1, 2, 3) }) 2451 } 2452 2453 func TestSetLenCap(t *testing.T) { 2454 xs := []int{1, 2, 3, 4, 5, 6, 7, 8} 2455 xa := [8]int{10, 20, 30, 40, 50, 60, 70, 80} 2456 2457 vs := ValueOf(&xs).Elem() 2458 shouldPanic(func() { vs.SetLen(10) }) 2459 shouldPanic(func() { vs.SetCap(10) }) 2460 shouldPanic(func() { vs.SetLen(-1) }) 2461 shouldPanic(func() { vs.SetCap(-1) }) 2462 shouldPanic(func() { vs.SetCap(6) }) // smaller than len 2463 vs.SetLen(5) 2464 if len(xs) != 5 || cap(xs) != 8 { 2465 t.Errorf("after SetLen(5), len, cap = %d, %d, want 5, 8", len(xs), cap(xs)) 2466 } 2467 vs.SetCap(6) 2468 if len(xs) != 5 || cap(xs) != 6 { 2469 t.Errorf("after SetCap(6), len, cap = %d, %d, want 5, 6", len(xs), cap(xs)) 2470 } 2471 vs.SetCap(5) 2472 if len(xs) != 5 || cap(xs) != 5 { 2473 t.Errorf("after SetCap(5), len, cap = %d, %d, want 5, 5", len(xs), cap(xs)) 2474 } 2475 shouldPanic(func() { vs.SetCap(4) }) // smaller than len 2476 shouldPanic(func() { vs.SetLen(6) }) // bigger than cap 2477 2478 va := ValueOf(&xa).Elem() 2479 shouldPanic(func() { va.SetLen(8) }) 2480 shouldPanic(func() { va.SetCap(8) }) 2481 } 2482 2483 func TestVariadic(t *testing.T) { 2484 var b bytes.Buffer 2485 V := ValueOf 2486 2487 b.Reset() 2488 V(fmt.Fprintf).Call([]Value{V(&b), V("%s, %d world"), V("hello"), V(42)}) 2489 if b.String() != "hello, 42 world" { 2490 t.Errorf("after Fprintf Call: %q != %q", b.String(), "hello 42 world") 2491 } 2492 2493 b.Reset() 2494 V(fmt.Fprintf).CallSlice([]Value{V(&b), V("%s, %d world"), V([]interface{}{"hello", 42})}) 2495 if b.String() != "hello, 42 world" { 2496 t.Errorf("after Fprintf CallSlice: %q != %q", b.String(), "hello 42 world") 2497 } 2498 } 2499 2500 func TestFuncArg(t *testing.T) { 2501 f1 := func(i int, f func(int) int) int { return f(i) } 2502 f2 := func(i int) int { return i + 1 } 2503 r := ValueOf(f1).Call([]Value{ValueOf(100), ValueOf(f2)}) 2504 if r[0].Int() != 101 { 2505 t.Errorf("function returned %d, want 101", r[0].Int()) 2506 } 2507 } 2508 2509 var tagGetTests = []struct { 2510 Tag StructTag 2511 Key string 2512 Value string 2513 }{ 2514 {`protobuf:"PB(1,2)"`, `protobuf`, `PB(1,2)`}, 2515 {`protobuf:"PB(1,2)"`, `foo`, ``}, 2516 {`protobuf:"PB(1,2)"`, `rotobuf`, ``}, 2517 {`protobuf:"PB(1,2)" json:"name"`, `json`, `name`}, 2518 {`protobuf:"PB(1,2)" json:"name"`, `protobuf`, `PB(1,2)`}, 2519 } 2520 2521 func TestTagGet(t *testing.T) { 2522 for _, tt := range tagGetTests { 2523 if v := tt.Tag.Get(tt.Key); v != tt.Value { 2524 t.Errorf("StructTag(%#q).Get(%#q) = %#q, want %#q", tt.Tag, tt.Key, v, tt.Value) 2525 } 2526 } 2527 } 2528 2529 func TestBytes(t *testing.T) { 2530 type B []byte 2531 x := B{1, 2, 3, 4} 2532 y := ValueOf(x).Bytes() 2533 if !bytes.Equal(x, y) { 2534 t.Fatalf("ValueOf(%v).Bytes() = %v", x, y) 2535 } 2536 if &x[0] != &y[0] { 2537 t.Errorf("ValueOf(%p).Bytes() = %p", &x[0], &y[0]) 2538 } 2539 } 2540 2541 func TestSetBytes(t *testing.T) { 2542 type B []byte 2543 var x B 2544 y := []byte{1, 2, 3, 4} 2545 ValueOf(&x).Elem().SetBytes(y) 2546 if !bytes.Equal(x, y) { 2547 t.Fatalf("ValueOf(%v).Bytes() = %v", x, y) 2548 } 2549 if &x[0] != &y[0] { 2550 t.Errorf("ValueOf(%p).Bytes() = %p", &x[0], &y[0]) 2551 } 2552 } 2553 2554 type Private struct { 2555 x int 2556 y **int 2557 } 2558 2559 func (p *Private) m() { 2560 } 2561 2562 type Public struct { 2563 X int 2564 Y **int 2565 } 2566 2567 func (p *Public) M() { 2568 } 2569 2570 func TestUnexported(t *testing.T) { 2571 var pub Public 2572 v := ValueOf(&pub) 2573 isValid(v.Elem().Field(0)) 2574 isValid(v.Elem().Field(1)) 2575 isValid(v.Elem().FieldByName("X")) 2576 isValid(v.Elem().FieldByName("Y")) 2577 isValid(v.Type().Method(0).Func) 2578 isNonNil(v.Elem().Field(0).Interface()) 2579 isNonNil(v.Elem().Field(1).Interface()) 2580 isNonNil(v.Elem().FieldByName("X").Interface()) 2581 isNonNil(v.Elem().FieldByName("Y").Interface()) 2582 isNonNil(v.Type().Method(0).Func.Interface()) 2583 2584 var priv Private 2585 v = ValueOf(&priv) 2586 isValid(v.Elem().Field(0)) 2587 isValid(v.Elem().Field(1)) 2588 isValid(v.Elem().FieldByName("x")) 2589 isValid(v.Elem().FieldByName("y")) 2590 isValid(v.Type().Method(0).Func) 2591 shouldPanic(func() { v.Elem().Field(0).Interface() }) 2592 shouldPanic(func() { v.Elem().Field(1).Interface() }) 2593 shouldPanic(func() { v.Elem().FieldByName("x").Interface() }) 2594 shouldPanic(func() { v.Elem().FieldByName("y").Interface() }) 2595 shouldPanic(func() { v.Type().Method(0).Func.Interface() }) 2596 } 2597 2598 func shouldPanic(f func()) { 2599 defer func() { 2600 if recover() == nil { 2601 panic("did not panic") 2602 } 2603 }() 2604 f() 2605 } 2606 2607 func isNonNil(x interface{}) { 2608 if x == nil { 2609 panic("nil interface") 2610 } 2611 } 2612 2613 func isValid(v Value) { 2614 if !v.IsValid() { 2615 panic("zero Value") 2616 } 2617 } 2618 2619 func TestAlias(t *testing.T) { 2620 x := string("hello") 2621 v := ValueOf(&x).Elem() 2622 oldvalue := v.Interface() 2623 v.SetString("world") 2624 newvalue := v.Interface() 2625 2626 if oldvalue != "hello" || newvalue != "world" { 2627 t.Errorf("aliasing: old=%q new=%q, want hello, world", oldvalue, newvalue) 2628 } 2629 } 2630 2631 var V = ValueOf 2632 2633 func EmptyInterfaceV(x interface{}) Value { 2634 return ValueOf(&x).Elem() 2635 } 2636 2637 func ReaderV(x io.Reader) Value { 2638 return ValueOf(&x).Elem() 2639 } 2640 2641 func ReadWriterV(x io.ReadWriter) Value { 2642 return ValueOf(&x).Elem() 2643 } 2644 2645 type Empty struct{} 2646 type MyString string 2647 type MyBytes []byte 2648 type MyRunes []int32 2649 type MyFunc func() 2650 type MyByte byte 2651 2652 var convertTests = []struct { 2653 in Value 2654 out Value 2655 }{ 2656 // numbers 2657 /* 2658 Edit .+1,/\*\//-1>cat >/tmp/x.go && go run /tmp/x.go 2659 2660 package main 2661 2662 import "fmt" 2663 2664 var numbers = []string{ 2665 "int8", "uint8", "int16", "uint16", 2666 "int32", "uint32", "int64", "uint64", 2667 "int", "uint", "uintptr", 2668 "float32", "float64", 2669 } 2670 2671 func main() { 2672 // all pairs but in an unusual order, 2673 // to emit all the int8, uint8 cases 2674 // before n grows too big. 2675 n := 1 2676 for i, f := range numbers { 2677 for _, g := range numbers[i:] { 2678 fmt.Printf("\t{V(%s(%d)), V(%s(%d))},\n", f, n, g, n) 2679 n++ 2680 if f != g { 2681 fmt.Printf("\t{V(%s(%d)), V(%s(%d))},\n", g, n, f, n) 2682 n++ 2683 } 2684 } 2685 } 2686 } 2687 */ 2688 {V(int8(1)), V(int8(1))}, 2689 {V(int8(2)), V(uint8(2))}, 2690 {V(uint8(3)), V(int8(3))}, 2691 {V(int8(4)), V(int16(4))}, 2692 {V(int16(5)), V(int8(5))}, 2693 {V(int8(6)), V(uint16(6))}, 2694 {V(uint16(7)), V(int8(7))}, 2695 {V(int8(8)), V(int32(8))}, 2696 {V(int32(9)), V(int8(9))}, 2697 {V(int8(10)), V(uint32(10))}, 2698 {V(uint32(11)), V(int8(11))}, 2699 {V(int8(12)), V(int64(12))}, 2700 {V(int64(13)), V(int8(13))}, 2701 {V(int8(14)), V(uint64(14))}, 2702 {V(uint64(15)), V(int8(15))}, 2703 {V(int8(16)), V(int(16))}, 2704 {V(int(17)), V(int8(17))}, 2705 {V(int8(18)), V(uint(18))}, 2706 {V(uint(19)), V(int8(19))}, 2707 {V(int8(20)), V(uintptr(20))}, 2708 {V(uintptr(21)), V(int8(21))}, 2709 {V(int8(22)), V(float32(22))}, 2710 {V(float32(23)), V(int8(23))}, 2711 {V(int8(24)), V(float64(24))}, 2712 {V(float64(25)), V(int8(25))}, 2713 {V(uint8(26)), V(uint8(26))}, 2714 {V(uint8(27)), V(int16(27))}, 2715 {V(int16(28)), V(uint8(28))}, 2716 {V(uint8(29)), V(uint16(29))}, 2717 {V(uint16(30)), V(uint8(30))}, 2718 {V(uint8(31)), V(int32(31))}, 2719 {V(int32(32)), V(uint8(32))}, 2720 {V(uint8(33)), V(uint32(33))}, 2721 {V(uint32(34)), V(uint8(34))}, 2722 {V(uint8(35)), V(int64(35))}, 2723 {V(int64(36)), V(uint8(36))}, 2724 {V(uint8(37)), V(uint64(37))}, 2725 {V(uint64(38)), V(uint8(38))}, 2726 {V(uint8(39)), V(int(39))}, 2727 {V(int(40)), V(uint8(40))}, 2728 {V(uint8(41)), V(uint(41))}, 2729 {V(uint(42)), V(uint8(42))}, 2730 {V(uint8(43)), V(uintptr(43))}, 2731 {V(uintptr(44)), V(uint8(44))}, 2732 {V(uint8(45)), V(float32(45))}, 2733 {V(float32(46)), V(uint8(46))}, 2734 {V(uint8(47)), V(float64(47))}, 2735 {V(float64(48)), V(uint8(48))}, 2736 {V(int16(49)), V(int16(49))}, 2737 {V(int16(50)), V(uint16(50))}, 2738 {V(uint16(51)), V(int16(51))}, 2739 {V(int16(52)), V(int32(52))}, 2740 {V(int32(53)), V(int16(53))}, 2741 {V(int16(54)), V(uint32(54))}, 2742 {V(uint32(55)), V(int16(55))}, 2743 {V(int16(56)), V(int64(56))}, 2744 {V(int64(57)), V(int16(57))}, 2745 {V(int16(58)), V(uint64(58))}, 2746 {V(uint64(59)), V(int16(59))}, 2747 {V(int16(60)), V(int(60))}, 2748 {V(int(61)), V(int16(61))}, 2749 {V(int16(62)), V(uint(62))}, 2750 {V(uint(63)), V(int16(63))}, 2751 {V(int16(64)), V(uintptr(64))}, 2752 {V(uintptr(65)), V(int16(65))}, 2753 {V(int16(66)), V(float32(66))}, 2754 {V(float32(67)), V(int16(67))}, 2755 {V(int16(68)), V(float64(68))}, 2756 {V(float64(69)), V(int16(69))}, 2757 {V(uint16(70)), V(uint16(70))}, 2758 {V(uint16(71)), V(int32(71))}, 2759 {V(int32(72)), V(uint16(72))}, 2760 {V(uint16(73)), V(uint32(73))}, 2761 {V(uint32(74)), V(uint16(74))}, 2762 {V(uint16(75)), V(int64(75))}, 2763 {V(int64(76)), V(uint16(76))}, 2764 {V(uint16(77)), V(uint64(77))}, 2765 {V(uint64(78)), V(uint16(78))}, 2766 {V(uint16(79)), V(int(79))}, 2767 {V(int(80)), V(uint16(80))}, 2768 {V(uint16(81)), V(uint(81))}, 2769 {V(uint(82)), V(uint16(82))}, 2770 {V(uint16(83)), V(uintptr(83))}, 2771 {V(uintptr(84)), V(uint16(84))}, 2772 {V(uint16(85)), V(float32(85))}, 2773 {V(float32(86)), V(uint16(86))}, 2774 {V(uint16(87)), V(float64(87))}, 2775 {V(float64(88)), V(uint16(88))}, 2776 {V(int32(89)), V(int32(89))}, 2777 {V(int32(90)), V(uint32(90))}, 2778 {V(uint32(91)), V(int32(91))}, 2779 {V(int32(92)), V(int64(92))}, 2780 {V(int64(93)), V(int32(93))}, 2781 {V(int32(94)), V(uint64(94))}, 2782 {V(uint64(95)), V(int32(95))}, 2783 {V(int32(96)), V(int(96))}, 2784 {V(int(97)), V(int32(97))}, 2785 {V(int32(98)), V(uint(98))}, 2786 {V(uint(99)), V(int32(99))}, 2787 {V(int32(100)), V(uintptr(100))}, 2788 {V(uintptr(101)), V(int32(101))}, 2789 {V(int32(102)), V(float32(102))}, 2790 {V(float32(103)), V(int32(103))}, 2791 {V(int32(104)), V(float64(104))}, 2792 {V(float64(105)), V(int32(105))}, 2793 {V(uint32(106)), V(uint32(106))}, 2794 {V(uint32(107)), V(int64(107))}, 2795 {V(int64(108)), V(uint32(108))}, 2796 {V(uint32(109)), V(uint64(109))}, 2797 {V(uint64(110)), V(uint32(110))}, 2798 {V(uint32(111)), V(int(111))}, 2799 {V(int(112)), V(uint32(112))}, 2800 {V(uint32(113)), V(uint(113))}, 2801 {V(uint(114)), V(uint32(114))}, 2802 {V(uint32(115)), V(uintptr(115))}, 2803 {V(uintptr(116)), V(uint32(116))}, 2804 {V(uint32(117)), V(float32(117))}, 2805 {V(float32(118)), V(uint32(118))}, 2806 {V(uint32(119)), V(float64(119))}, 2807 {V(float64(120)), V(uint32(120))}, 2808 {V(int64(121)), V(int64(121))}, 2809 {V(int64(122)), V(uint64(122))}, 2810 {V(uint64(123)), V(int64(123))}, 2811 {V(int64(124)), V(int(124))}, 2812 {V(int(125)), V(int64(125))}, 2813 {V(int64(126)), V(uint(126))}, 2814 {V(uint(127)), V(int64(127))}, 2815 {V(int64(128)), V(uintptr(128))}, 2816 {V(uintptr(129)), V(int64(129))}, 2817 {V(int64(130)), V(float32(130))}, 2818 {V(float32(131)), V(int64(131))}, 2819 {V(int64(132)), V(float64(132))}, 2820 {V(float64(133)), V(int64(133))}, 2821 {V(uint64(134)), V(uint64(134))}, 2822 {V(uint64(135)), V(int(135))}, 2823 {V(int(136)), V(uint64(136))}, 2824 {V(uint64(137)), V(uint(137))}, 2825 {V(uint(138)), V(uint64(138))}, 2826 {V(uint64(139)), V(uintptr(139))}, 2827 {V(uintptr(140)), V(uint64(140))}, 2828 {V(uint64(141)), V(float32(141))}, 2829 {V(float32(142)), V(uint64(142))}, 2830 {V(uint64(143)), V(float64(143))}, 2831 {V(float64(144)), V(uint64(144))}, 2832 {V(int(145)), V(int(145))}, 2833 {V(int(146)), V(uint(146))}, 2834 {V(uint(147)), V(int(147))}, 2835 {V(int(148)), V(uintptr(148))}, 2836 {V(uintptr(149)), V(int(149))}, 2837 {V(int(150)), V(float32(150))}, 2838 {V(float32(151)), V(int(151))}, 2839 {V(int(152)), V(float64(152))}, 2840 {V(float64(153)), V(int(153))}, 2841 {V(uint(154)), V(uint(154))}, 2842 {V(uint(155)), V(uintptr(155))}, 2843 {V(uintptr(156)), V(uint(156))}, 2844 {V(uint(157)), V(float32(157))}, 2845 {V(float32(158)), V(uint(158))}, 2846 {V(uint(159)), V(float64(159))}, 2847 {V(float64(160)), V(uint(160))}, 2848 {V(uintptr(161)), V(uintptr(161))}, 2849 {V(uintptr(162)), V(float32(162))}, 2850 {V(float32(163)), V(uintptr(163))}, 2851 {V(uintptr(164)), V(float64(164))}, 2852 {V(float64(165)), V(uintptr(165))}, 2853 {V(float32(166)), V(float32(166))}, 2854 {V(float32(167)), V(float64(167))}, 2855 {V(float64(168)), V(float32(168))}, 2856 {V(float64(169)), V(float64(169))}, 2857 2858 // truncation 2859 {V(float64(1.5)), V(int(1))}, 2860 2861 // complex 2862 {V(complex64(1i)), V(complex64(1i))}, 2863 {V(complex64(2i)), V(complex128(2i))}, 2864 {V(complex128(3i)), V(complex64(3i))}, 2865 {V(complex128(4i)), V(complex128(4i))}, 2866 2867 // string 2868 {V(string("hello")), V(string("hello"))}, 2869 {V(string("bytes1")), V([]byte("bytes1"))}, 2870 {V([]byte("bytes2")), V(string("bytes2"))}, 2871 {V([]byte("bytes3")), V([]byte("bytes3"))}, 2872 {V(string("runes♝")), V([]rune("runes♝"))}, 2873 {V([]rune("runes♕")), V(string("runes♕"))}, 2874 {V([]rune("runes🙈🙉🙊")), V([]rune("runes🙈🙉🙊"))}, 2875 {V(int('a')), V(string("a"))}, 2876 {V(int8('a')), V(string("a"))}, 2877 {V(int16('a')), V(string("a"))}, 2878 {V(int32('a')), V(string("a"))}, 2879 {V(int64('a')), V(string("a"))}, 2880 {V(uint('a')), V(string("a"))}, 2881 {V(uint8('a')), V(string("a"))}, 2882 {V(uint16('a')), V(string("a"))}, 2883 {V(uint32('a')), V(string("a"))}, 2884 {V(uint64('a')), V(string("a"))}, 2885 {V(uintptr('a')), V(string("a"))}, 2886 {V(int(-1)), V(string("\uFFFD"))}, 2887 {V(int8(-2)), V(string("\uFFFD"))}, 2888 {V(int16(-3)), V(string("\uFFFD"))}, 2889 {V(int32(-4)), V(string("\uFFFD"))}, 2890 {V(int64(-5)), V(string("\uFFFD"))}, 2891 {V(uint(0x110001)), V(string("\uFFFD"))}, 2892 {V(uint32(0x110002)), V(string("\uFFFD"))}, 2893 {V(uint64(0x110003)), V(string("\uFFFD"))}, 2894 {V(uintptr(0x110004)), V(string("\uFFFD"))}, 2895 2896 // named string 2897 {V(MyString("hello")), V(string("hello"))}, 2898 {V(string("hello")), V(MyString("hello"))}, 2899 {V(string("hello")), V(string("hello"))}, 2900 {V(MyString("hello")), V(MyString("hello"))}, 2901 {V(MyString("bytes1")), V([]byte("bytes1"))}, 2902 {V([]byte("bytes2")), V(MyString("bytes2"))}, 2903 {V([]byte("bytes3")), V([]byte("bytes3"))}, 2904 {V(MyString("runes♝")), V([]rune("runes♝"))}, 2905 {V([]rune("runes♕")), V(MyString("runes♕"))}, 2906 {V([]rune("runes🙈🙉🙊")), V([]rune("runes🙈🙉🙊"))}, 2907 {V([]rune("runes🙈🙉🙊")), V(MyRunes("runes🙈🙉🙊"))}, 2908 {V(MyRunes("runes🙈🙉🙊")), V([]rune("runes🙈🙉🙊"))}, 2909 {V(int('a')), V(MyString("a"))}, 2910 {V(int8('a')), V(MyString("a"))}, 2911 {V(int16('a')), V(MyString("a"))}, 2912 {V(int32('a')), V(MyString("a"))}, 2913 {V(int64('a')), V(MyString("a"))}, 2914 {V(uint('a')), V(MyString("a"))}, 2915 {V(uint8('a')), V(MyString("a"))}, 2916 {V(uint16('a')), V(MyString("a"))}, 2917 {V(uint32('a')), V(MyString("a"))}, 2918 {V(uint64('a')), V(MyString("a"))}, 2919 {V(uintptr('a')), V(MyString("a"))}, 2920 {V(int(-1)), V(MyString("\uFFFD"))}, 2921 {V(int8(-2)), V(MyString("\uFFFD"))}, 2922 {V(int16(-3)), V(MyString("\uFFFD"))}, 2923 {V(int32(-4)), V(MyString("\uFFFD"))}, 2924 {V(int64(-5)), V(MyString("\uFFFD"))}, 2925 {V(uint(0x110001)), V(MyString("\uFFFD"))}, 2926 {V(uint32(0x110002)), V(MyString("\uFFFD"))}, 2927 {V(uint64(0x110003)), V(MyString("\uFFFD"))}, 2928 {V(uintptr(0x110004)), V(MyString("\uFFFD"))}, 2929 2930 // named []byte 2931 {V(string("bytes1")), V(MyBytes("bytes1"))}, 2932 {V(MyBytes("bytes2")), V(string("bytes2"))}, 2933 {V(MyBytes("bytes3")), V(MyBytes("bytes3"))}, 2934 {V(MyString("bytes1")), V(MyBytes("bytes1"))}, 2935 {V(MyBytes("bytes2")), V(MyString("bytes2"))}, 2936 2937 // named []rune 2938 {V(string("runes♝")), V(MyRunes("runes♝"))}, 2939 {V(MyRunes("runes♕")), V(string("runes♕"))}, 2940 {V(MyRunes("runes🙈🙉🙊")), V(MyRunes("runes🙈🙉🙊"))}, 2941 {V(MyString("runes♝")), V(MyRunes("runes♝"))}, 2942 {V(MyRunes("runes♕")), V(MyString("runes♕"))}, 2943 2944 // named types and equal underlying types 2945 {V(new(int)), V(new(integer))}, 2946 {V(new(integer)), V(new(int))}, 2947 {V(Empty{}), V(struct{}{})}, 2948 {V(new(Empty)), V(new(struct{}))}, 2949 {V(struct{}{}), V(Empty{})}, 2950 {V(new(struct{})), V(new(Empty))}, 2951 {V(Empty{}), V(Empty{})}, 2952 {V(MyBytes{}), V([]byte{})}, 2953 {V([]byte{}), V(MyBytes{})}, 2954 {V((func())(nil)), V(MyFunc(nil))}, 2955 {V((MyFunc)(nil)), V((func())(nil))}, 2956 2957 // can convert *byte and *MyByte 2958 {V((*byte)(nil)), V((*MyByte)(nil))}, 2959 {V((*MyByte)(nil)), V((*byte)(nil))}, 2960 2961 // cannot convert mismatched array sizes 2962 {V([2]byte{}), V([2]byte{})}, 2963 {V([3]byte{}), V([3]byte{})}, 2964 2965 // cannot convert other instances 2966 {V((**byte)(nil)), V((**byte)(nil))}, 2967 {V((**MyByte)(nil)), V((**MyByte)(nil))}, 2968 {V((chan byte)(nil)), V((chan byte)(nil))}, 2969 {V((chan MyByte)(nil)), V((chan MyByte)(nil))}, 2970 {V(([]byte)(nil)), V(([]byte)(nil))}, 2971 {V(([]MyByte)(nil)), V(([]MyByte)(nil))}, 2972 {V((map[int]byte)(nil)), V((map[int]byte)(nil))}, 2973 {V((map[int]MyByte)(nil)), V((map[int]MyByte)(nil))}, 2974 {V((map[byte]int)(nil)), V((map[byte]int)(nil))}, 2975 {V((map[MyByte]int)(nil)), V((map[MyByte]int)(nil))}, 2976 {V([2]byte{}), V([2]byte{})}, 2977 {V([2]MyByte{}), V([2]MyByte{})}, 2978 2979 // other 2980 {V((***int)(nil)), V((***int)(nil))}, 2981 {V((***byte)(nil)), V((***byte)(nil))}, 2982 {V((***int32)(nil)), V((***int32)(nil))}, 2983 {V((***int64)(nil)), V((***int64)(nil))}, 2984 {V((chan int)(nil)), V((<-chan int)(nil))}, 2985 {V((chan int)(nil)), V((chan<- int)(nil))}, 2986 {V((chan string)(nil)), V((<-chan string)(nil))}, 2987 {V((chan string)(nil)), V((chan<- string)(nil))}, 2988 {V((chan byte)(nil)), V((chan byte)(nil))}, 2989 {V((chan MyByte)(nil)), V((chan MyByte)(nil))}, 2990 {V((map[int]bool)(nil)), V((map[int]bool)(nil))}, 2991 {V((map[int]byte)(nil)), V((map[int]byte)(nil))}, 2992 {V((map[uint]bool)(nil)), V((map[uint]bool)(nil))}, 2993 {V([]uint(nil)), V([]uint(nil))}, 2994 {V([]int(nil)), V([]int(nil))}, 2995 {V(new(interface{})), V(new(interface{}))}, 2996 {V(new(io.Reader)), V(new(io.Reader))}, 2997 {V(new(io.Writer)), V(new(io.Writer))}, 2998 2999 // interfaces 3000 {V(int(1)), EmptyInterfaceV(int(1))}, 3001 {V(string("hello")), EmptyInterfaceV(string("hello"))}, 3002 {V(new(bytes.Buffer)), ReaderV(new(bytes.Buffer))}, 3003 {ReadWriterV(new(bytes.Buffer)), ReaderV(new(bytes.Buffer))}, 3004 {V(new(bytes.Buffer)), ReadWriterV(new(bytes.Buffer))}, 3005 } 3006 3007 func TestConvert(t *testing.T) { 3008 canConvert := map[[2]Type]bool{} 3009 all := map[Type]bool{} 3010 3011 for _, tt := range convertTests { 3012 t1 := tt.in.Type() 3013 if !t1.ConvertibleTo(t1) { 3014 t.Errorf("(%s).ConvertibleTo(%s) = false, want true", t1, t1) 3015 continue 3016 } 3017 3018 t2 := tt.out.Type() 3019 if !t1.ConvertibleTo(t2) { 3020 t.Errorf("(%s).ConvertibleTo(%s) = false, want true", t1, t2) 3021 continue 3022 } 3023 3024 all[t1] = true 3025 all[t2] = true 3026 canConvert[[2]Type{t1, t2}] = true 3027 3028 // vout1 represents the in value converted to the in type. 3029 v1 := tt.in 3030 vout1 := v1.Convert(t1) 3031 out1 := vout1.Interface() 3032 if vout1.Type() != tt.in.Type() || !DeepEqual(out1, tt.in.Interface()) { 3033 t.Errorf("ValueOf(%T(%[1]v)).Convert(%s) = %T(%[3]v), want %T(%[4]v)", tt.in.Interface(), t1, out1, tt.in.Interface()) 3034 } 3035 3036 // vout2 represents the in value converted to the out type. 3037 vout2 := v1.Convert(t2) 3038 out2 := vout2.Interface() 3039 if vout2.Type() != tt.out.Type() || !DeepEqual(out2, tt.out.Interface()) { 3040 t.Errorf("ValueOf(%T(%[1]v)).Convert(%s) = %T(%[3]v), want %T(%[4]v)", tt.in.Interface(), t2, out2, tt.out.Interface()) 3041 } 3042 3043 // vout3 represents a new value of the out type, set to vout2. This makes 3044 // sure the converted value vout2 is really usable as a regular value. 3045 vout3 := New(t2).Elem() 3046 vout3.Set(vout2) 3047 out3 := vout3.Interface() 3048 if vout3.Type() != tt.out.Type() || !DeepEqual(out3, tt.out.Interface()) { 3049 t.Errorf("Set(ValueOf(%T(%[1]v)).Convert(%s)) = %T(%[3]v), want %T(%[4]v)", tt.in.Interface(), t2, out3, tt.out.Interface()) 3050 } 3051 3052 if IsRO(v1) { 3053 t.Errorf("table entry %v is RO, should not be", v1) 3054 } 3055 if IsRO(vout1) { 3056 t.Errorf("self-conversion output %v is RO, should not be", vout1) 3057 } 3058 if IsRO(vout2) { 3059 t.Errorf("conversion output %v is RO, should not be", vout2) 3060 } 3061 if IsRO(vout3) { 3062 t.Errorf("set(conversion output) %v is RO, should not be", vout3) 3063 } 3064 if !IsRO(MakeRO(v1).Convert(t1)) { 3065 t.Errorf("RO self-conversion output %v is not RO, should be", v1) 3066 } 3067 if !IsRO(MakeRO(v1).Convert(t2)) { 3068 t.Errorf("RO conversion output %v is not RO, should be", v1) 3069 } 3070 } 3071 3072 // Assume that of all the types we saw during the tests, 3073 // if there wasn't an explicit entry for a conversion between 3074 // a pair of types, then it's not to be allowed. This checks for 3075 // things like 'int64' converting to '*int'. 3076 for t1 := range all { 3077 for t2 := range all { 3078 expectOK := t1 == t2 || canConvert[[2]Type{t1, t2}] || t2.Kind() == Interface && t2.NumMethod() == 0 3079 if ok := t1.ConvertibleTo(t2); ok != expectOK { 3080 t.Errorf("(%s).ConvertibleTo(%s) = %v, want %v", t1, t2, ok, expectOK) 3081 } 3082 } 3083 } 3084 } 3085 3086 func TestOverflow(t *testing.T) { 3087 if ovf := V(float64(0)).OverflowFloat(1e300); ovf { 3088 t.Errorf("%v wrongly overflows float64", 1e300) 3089 } 3090 3091 maxFloat32 := float64((1<<24 - 1) << (127 - 23)) 3092 if ovf := V(float32(0)).OverflowFloat(maxFloat32); ovf { 3093 t.Errorf("%v wrongly overflows float32", maxFloat32) 3094 } 3095 ovfFloat32 := float64((1<<24-1)<<(127-23) + 1<<(127-52)) 3096 if ovf := V(float32(0)).OverflowFloat(ovfFloat32); !ovf { 3097 t.Errorf("%v should overflow float32", ovfFloat32) 3098 } 3099 if ovf := V(float32(0)).OverflowFloat(-ovfFloat32); !ovf { 3100 t.Errorf("%v should overflow float32", -ovfFloat32) 3101 } 3102 3103 maxInt32 := int64(0x7fffffff) 3104 if ovf := V(int32(0)).OverflowInt(maxInt32); ovf { 3105 t.Errorf("%v wrongly overflows int32", maxInt32) 3106 } 3107 if ovf := V(int32(0)).OverflowInt(-1 << 31); ovf { 3108 t.Errorf("%v wrongly overflows int32", -int64(1)<<31) 3109 } 3110 ovfInt32 := int64(1 << 31) 3111 if ovf := V(int32(0)).OverflowInt(ovfInt32); !ovf { 3112 t.Errorf("%v should overflow int32", ovfInt32) 3113 } 3114 3115 maxUint32 := uint64(0xffffffff) 3116 if ovf := V(uint32(0)).OverflowUint(maxUint32); ovf { 3117 t.Errorf("%v wrongly overflows uint32", maxUint32) 3118 } 3119 ovfUint32 := uint64(1 << 32) 3120 if ovf := V(uint32(0)).OverflowUint(ovfUint32); !ovf { 3121 t.Errorf("%v should overflow uint32", ovfUint32) 3122 } 3123 } 3124 3125 func checkSameType(t *testing.T, x, y interface{}) { 3126 if TypeOf(x) != TypeOf(y) { 3127 t.Errorf("did not find preexisting type for %s (vs %s)", TypeOf(x), TypeOf(y)) 3128 } 3129 } 3130 3131 func TestArrayOf(t *testing.T) { 3132 // check construction and use of type not in binary 3133 type T int 3134 at := ArrayOf(10, TypeOf(T(1))) 3135 v := New(at).Elem() 3136 for i := 0; i < v.Len(); i++ { 3137 v.Index(i).Set(ValueOf(T(i))) 3138 } 3139 s := fmt.Sprint(v.Interface()) 3140 want := "[0 1 2 3 4 5 6 7 8 9]" 3141 if s != want { 3142 t.Errorf("constructed array = %s, want %s", s, want) 3143 } 3144 3145 // check that type already in binary is found 3146 checkSameType(t, Zero(ArrayOf(5, TypeOf(T(1)))).Interface(), [5]T{}) 3147 } 3148 3149 func TestSliceOf(t *testing.T) { 3150 // check construction and use of type not in binary 3151 type T int 3152 st := SliceOf(TypeOf(T(1))) 3153 v := MakeSlice(st, 10, 10) 3154 runtime.GC() 3155 for i := 0; i < v.Len(); i++ { 3156 v.Index(i).Set(ValueOf(T(i))) 3157 runtime.GC() 3158 } 3159 s := fmt.Sprint(v.Interface()) 3160 want := "[0 1 2 3 4 5 6 7 8 9]" 3161 if s != want { 3162 t.Errorf("constructed slice = %s, want %s", s, want) 3163 } 3164 3165 // check that type already in binary is found 3166 type T1 int 3167 checkSameType(t, Zero(SliceOf(TypeOf(T1(1)))).Interface(), []T1{}) 3168 } 3169 3170 func TestSliceOverflow(t *testing.T) { 3171 // check that MakeSlice panics when size of slice overflows uint 3172 const S = 1e6 3173 s := uint(S) 3174 l := (1<<(unsafe.Sizeof((*byte)(nil))*8)-1)/s + 1 3175 if l*s >= s { 3176 t.Fatal("slice size does not overflow") 3177 } 3178 var x [S]byte 3179 st := SliceOf(TypeOf(x)) 3180 defer func() { 3181 err := recover() 3182 if err == nil { 3183 t.Fatal("slice overflow does not panic") 3184 } 3185 }() 3186 MakeSlice(st, int(l), int(l)) 3187 } 3188 3189 func TestSliceOfGC(t *testing.T) { 3190 type T *uintptr 3191 tt := TypeOf(T(nil)) 3192 st := SliceOf(tt) 3193 const n = 100 3194 var x []interface{} 3195 for i := 0; i < n; i++ { 3196 v := MakeSlice(st, n, n) 3197 for j := 0; j < v.Len(); j++ { 3198 p := new(uintptr) 3199 *p = uintptr(i*n + j) 3200 v.Index(j).Set(ValueOf(p).Convert(tt)) 3201 } 3202 x = append(x, v.Interface()) 3203 } 3204 runtime.GC() 3205 3206 for i, xi := range x { 3207 v := ValueOf(xi) 3208 for j := 0; j < v.Len(); j++ { 3209 k := v.Index(j).Elem().Interface() 3210 if k != uintptr(i*n+j) { 3211 t.Errorf("lost x[%d][%d] = %d, want %d", i, j, k, i*n+j) 3212 } 3213 } 3214 } 3215 } 3216 3217 func TestChanOf(t *testing.T) { 3218 // check construction and use of type not in binary 3219 type T string 3220 ct := ChanOf(BothDir, TypeOf(T(""))) 3221 v := MakeChan(ct, 2) 3222 runtime.GC() 3223 v.Send(ValueOf(T("hello"))) 3224 runtime.GC() 3225 v.Send(ValueOf(T("world"))) 3226 runtime.GC() 3227 3228 sv1, _ := v.Recv() 3229 sv2, _ := v.Recv() 3230 s1 := sv1.String() 3231 s2 := sv2.String() 3232 if s1 != "hello" || s2 != "world" { 3233 t.Errorf("constructed chan: have %q, %q, want %q, %q", s1, s2, "hello", "world") 3234 } 3235 3236 // check that type already in binary is found 3237 type T1 int 3238 checkSameType(t, Zero(ChanOf(BothDir, TypeOf(T1(1)))).Interface(), (chan T1)(nil)) 3239 } 3240 3241 func TestChanOfGC(t *testing.T) { 3242 done := make(chan bool, 1) 3243 go func() { 3244 select { 3245 case <-done: 3246 case <-time.After(5 * time.Second): 3247 panic("deadlock in TestChanOfGC") 3248 } 3249 }() 3250 3251 defer func() { 3252 done <- true 3253 }() 3254 3255 type T *uintptr 3256 tt := TypeOf(T(nil)) 3257 ct := ChanOf(BothDir, tt) 3258 3259 // NOTE: The garbage collector handles allocated channels specially, 3260 // so we have to save pointers to channels in x; the pointer code will 3261 // use the gc info in the newly constructed chan type. 3262 const n = 100 3263 var x []interface{} 3264 for i := 0; i < n; i++ { 3265 v := MakeChan(ct, n) 3266 for j := 0; j < n; j++ { 3267 p := new(uintptr) 3268 *p = uintptr(i*n + j) 3269 v.Send(ValueOf(p).Convert(tt)) 3270 } 3271 pv := New(ct) 3272 pv.Elem().Set(v) 3273 x = append(x, pv.Interface()) 3274 } 3275 runtime.GC() 3276 3277 for i, xi := range x { 3278 v := ValueOf(xi).Elem() 3279 for j := 0; j < n; j++ { 3280 pv, _ := v.Recv() 3281 k := pv.Elem().Interface() 3282 if k != uintptr(i*n+j) { 3283 t.Errorf("lost x[%d][%d] = %d, want %d", i, j, k, i*n+j) 3284 } 3285 } 3286 } 3287 } 3288 3289 func TestMapOf(t *testing.T) { 3290 // check construction and use of type not in binary 3291 type K string 3292 type V float64 3293 3294 v := MakeMap(MapOf(TypeOf(K("")), TypeOf(V(0)))) 3295 runtime.GC() 3296 v.SetMapIndex(ValueOf(K("a")), ValueOf(V(1))) 3297 runtime.GC() 3298 3299 s := fmt.Sprint(v.Interface()) 3300 want := "map[a:1]" 3301 if s != want { 3302 t.Errorf("constructed map = %s, want %s", s, want) 3303 } 3304 3305 // check that type already in binary is found 3306 checkSameType(t, Zero(MapOf(TypeOf(V(0)), TypeOf(K("")))).Interface(), map[V]K(nil)) 3307 3308 // check that invalid key type panics 3309 shouldPanic(func() { MapOf(TypeOf((func())(nil)), TypeOf(false)) }) 3310 } 3311 3312 func TestMapOfGCKeys(t *testing.T) { 3313 type T *uintptr 3314 tt := TypeOf(T(nil)) 3315 mt := MapOf(tt, TypeOf(false)) 3316 3317 // NOTE: The garbage collector handles allocated maps specially, 3318 // so we have to save pointers to maps in x; the pointer code will 3319 // use the gc info in the newly constructed map type. 3320 const n = 100 3321 var x []interface{} 3322 for i := 0; i < n; i++ { 3323 v := MakeMap(mt) 3324 for j := 0; j < n; j++ { 3325 p := new(uintptr) 3326 *p = uintptr(i*n + j) 3327 v.SetMapIndex(ValueOf(p).Convert(tt), ValueOf(true)) 3328 } 3329 pv := New(mt) 3330 pv.Elem().Set(v) 3331 x = append(x, pv.Interface()) 3332 } 3333 runtime.GC() 3334 3335 for i, xi := range x { 3336 v := ValueOf(xi).Elem() 3337 var out []int 3338 for _, kv := range v.MapKeys() { 3339 out = append(out, int(kv.Elem().Interface().(uintptr))) 3340 } 3341 sort.Ints(out) 3342 for j, k := range out { 3343 if k != i*n+j { 3344 t.Errorf("lost x[%d][%d] = %d, want %d", i, j, k, i*n+j) 3345 } 3346 } 3347 } 3348 } 3349 3350 func TestMapOfGCValues(t *testing.T) { 3351 type T *uintptr 3352 tt := TypeOf(T(nil)) 3353 mt := MapOf(TypeOf(1), tt) 3354 3355 // NOTE: The garbage collector handles allocated maps specially, 3356 // so we have to save pointers to maps in x; the pointer code will 3357 // use the gc info in the newly constructed map type. 3358 const n = 100 3359 var x []interface{} 3360 for i := 0; i < n; i++ { 3361 v := MakeMap(mt) 3362 for j := 0; j < n; j++ { 3363 p := new(uintptr) 3364 *p = uintptr(i*n + j) 3365 v.SetMapIndex(ValueOf(j), ValueOf(p).Convert(tt)) 3366 } 3367 pv := New(mt) 3368 pv.Elem().Set(v) 3369 x = append(x, pv.Interface()) 3370 } 3371 runtime.GC() 3372 3373 for i, xi := range x { 3374 v := ValueOf(xi).Elem() 3375 for j := 0; j < n; j++ { 3376 k := v.MapIndex(ValueOf(j)).Elem().Interface().(uintptr) 3377 if k != uintptr(i*n+j) { 3378 t.Errorf("lost x[%d][%d] = %d, want %d", i, j, k, i*n+j) 3379 } 3380 } 3381 } 3382 } 3383 3384 type B1 struct { 3385 X int 3386 Y int 3387 Z int 3388 } 3389 3390 func BenchmarkFieldByName1(b *testing.B) { 3391 t := TypeOf(B1{}) 3392 for i := 0; i < b.N; i++ { 3393 t.FieldByName("Z") 3394 } 3395 } 3396 3397 func BenchmarkFieldByName2(b *testing.B) { 3398 t := TypeOf(S3{}) 3399 for i := 0; i < b.N; i++ { 3400 t.FieldByName("B") 3401 } 3402 } 3403 3404 type R0 struct { 3405 *R1 3406 *R2 3407 *R3 3408 *R4 3409 } 3410 3411 type R1 struct { 3412 *R5 3413 *R6 3414 *R7 3415 *R8 3416 } 3417 3418 type R2 R1 3419 type R3 R1 3420 type R4 R1 3421 3422 type R5 struct { 3423 *R9 3424 *R10 3425 *R11 3426 *R12 3427 } 3428 3429 type R6 R5 3430 type R7 R5 3431 type R8 R5 3432 3433 type R9 struct { 3434 *R13 3435 *R14 3436 *R15 3437 *R16 3438 } 3439 3440 type R10 R9 3441 type R11 R9 3442 type R12 R9 3443 3444 type R13 struct { 3445 *R17 3446 *R18 3447 *R19 3448 *R20 3449 } 3450 3451 type R14 R13 3452 type R15 R13 3453 type R16 R13 3454 3455 type R17 struct { 3456 *R21 3457 *R22 3458 *R23 3459 *R24 3460 } 3461 3462 type R18 R17 3463 type R19 R17 3464 type R20 R17 3465 3466 type R21 struct { 3467 X int 3468 } 3469 3470 type R22 R21 3471 type R23 R21 3472 type R24 R21 3473 3474 func TestEmbed(t *testing.T) { 3475 typ := TypeOf(R0{}) 3476 f, ok := typ.FieldByName("X") 3477 if ok { 3478 t.Fatalf(`FieldByName("X") should fail, returned %v`, f.Index) 3479 } 3480 } 3481 3482 func BenchmarkFieldByName3(b *testing.B) { 3483 t := TypeOf(R0{}) 3484 for i := 0; i < b.N; i++ { 3485 t.FieldByName("X") 3486 } 3487 } 3488 3489 type S struct { 3490 i1 int64 3491 i2 int64 3492 } 3493 3494 func BenchmarkInterfaceBig(b *testing.B) { 3495 v := ValueOf(S{}) 3496 for i := 0; i < b.N; i++ { 3497 v.Interface() 3498 } 3499 b.StopTimer() 3500 } 3501 3502 func TestAllocsInterfaceBig(t *testing.T) { 3503 if testing.Short() { 3504 t.Skip("skipping malloc count in short mode") 3505 } 3506 v := ValueOf(S{}) 3507 if allocs := testing.AllocsPerRun(100, func() { v.Interface() }); allocs > 0 { 3508 t.Error("allocs:", allocs) 3509 } 3510 } 3511 3512 func BenchmarkInterfaceSmall(b *testing.B) { 3513 v := ValueOf(int64(0)) 3514 for i := 0; i < b.N; i++ { 3515 v.Interface() 3516 } 3517 } 3518 3519 func TestAllocsInterfaceSmall(t *testing.T) { 3520 if testing.Short() { 3521 t.Skip("skipping malloc count in short mode") 3522 } 3523 v := ValueOf(int64(0)) 3524 if allocs := testing.AllocsPerRun(100, func() { v.Interface() }); allocs > 0 { 3525 t.Error("allocs:", allocs) 3526 } 3527 } 3528 3529 // An exhaustive is a mechanism for writing exhaustive or stochastic tests. 3530 // The basic usage is: 3531 // 3532 // for x.Next() { 3533 // ... code using x.Maybe() or x.Choice(n) to create test cases ... 3534 // } 3535 // 3536 // Each iteration of the loop returns a different set of results, until all 3537 // possible result sets have been explored. It is okay for different code paths 3538 // to make different method call sequences on x, but there must be no 3539 // other source of non-determinism in the call sequences. 3540 // 3541 // When faced with a new decision, x chooses randomly. Future explorations 3542 // of that path will choose successive values for the result. Thus, stopping 3543 // the loop after a fixed number of iterations gives somewhat stochastic 3544 // testing. 3545 // 3546 // Example: 3547 // 3548 // for x.Next() { 3549 // v := make([]bool, x.Choose(4)) 3550 // for i := range v { 3551 // v[i] = x.Maybe() 3552 // } 3553 // fmt.Println(v) 3554 // } 3555 // 3556 // prints (in some order): 3557 // 3558 // [] 3559 // [false] 3560 // [true] 3561 // [false false] 3562 // [false true] 3563 // ... 3564 // [true true] 3565 // [false false false] 3566 // ... 3567 // [true true true] 3568 // [false false false false] 3569 // ... 3570 // [true true true true] 3571 // 3572 type exhaustive struct { 3573 r *rand.Rand 3574 pos int 3575 last []choice 3576 } 3577 3578 type choice struct { 3579 off int 3580 n int 3581 max int 3582 } 3583 3584 func (x *exhaustive) Next() bool { 3585 if x.r == nil { 3586 x.r = rand.New(rand.NewSource(time.Now().UnixNano())) 3587 } 3588 x.pos = 0 3589 if x.last == nil { 3590 x.last = []choice{} 3591 return true 3592 } 3593 for i := len(x.last) - 1; i >= 0; i-- { 3594 c := &x.last[i] 3595 if c.n+1 < c.max { 3596 c.n++ 3597 x.last = x.last[:i+1] 3598 return true 3599 } 3600 } 3601 return false 3602 } 3603 3604 func (x *exhaustive) Choose(max int) int { 3605 if x.pos >= len(x.last) { 3606 x.last = append(x.last, choice{x.r.Intn(max), 0, max}) 3607 } 3608 c := &x.last[x.pos] 3609 x.pos++ 3610 if c.max != max { 3611 panic("inconsistent use of exhaustive tester") 3612 } 3613 return (c.n + c.off) % max 3614 } 3615 3616 func (x *exhaustive) Maybe() bool { 3617 return x.Choose(2) == 1 3618 }