gitee.com/ks-custle/core-gm@v0.0.0-20230922171213-b83bdd97b62c/internal/reflectlite/set_test.go (about)

     1  // Copyright 2011 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 reflectlite_test
     6  
     7  import (
     8  	"bytes"
     9  	"go/ast"
    10  	"go/token"
    11  	"io"
    12  	"testing"
    13  
    14  	. "gitee.com/ks-custle/core-gm/internal/reflectlite"
    15  )
    16  
    17  func TestImplicitSetConversion(t *testing.T) {
    18  	// Assume TestImplicitMapConversion covered the basics.
    19  	// Just make sure conversions are being applied at all.
    20  	var r io.Reader
    21  	b := new(bytes.Buffer)
    22  	rv := ValueOf(&r).Elem()
    23  	rv.Set(ValueOf(b))
    24  	if r != b {
    25  		t.Errorf("after Set: r=%T(%v)", r, r)
    26  	}
    27  }
    28  
    29  var implementsTests = []struct {
    30  	x interface{}
    31  	t interface{}
    32  	b bool
    33  }{
    34  	{new(*bytes.Buffer), new(io.Reader), true},
    35  	{new(bytes.Buffer), new(io.Reader), false},
    36  	{new(*bytes.Buffer), new(io.ReaderAt), false},
    37  	{new(*ast.Ident), new(ast.Expr), true},
    38  	{new(*notAnExpr), new(ast.Expr), false},
    39  	{new(*ast.Ident), new(notASTExpr), false},
    40  	{new(notASTExpr), new(ast.Expr), false},
    41  	{new(ast.Expr), new(notASTExpr), false},
    42  	{new(*notAnExpr), new(notASTExpr), true},
    43  	{new(mapError), new(error), true},
    44  	{new(*mapError), new(error), true},
    45  }
    46  
    47  type notAnExpr struct{}
    48  
    49  func (notAnExpr) Pos() token.Pos { return token.NoPos }
    50  func (notAnExpr) End() token.Pos { return token.NoPos }
    51  func (notAnExpr) exprNode()      {}
    52  
    53  type notASTExpr interface {
    54  	Pos() token.Pos
    55  	End() token.Pos
    56  	exprNode()
    57  }
    58  
    59  type mapError map[string]string
    60  
    61  func (mapError) Error() string { return "mapError" }
    62  
    63  var _ error = mapError{}
    64  var _ error = new(mapError)
    65  
    66  func TestImplements(t *testing.T) {
    67  	for _, tt := range implementsTests {
    68  		xv := TypeOf(tt.x).Elem()
    69  		xt := TypeOf(tt.t).Elem()
    70  		if b := xv.Implements(xt); b != tt.b {
    71  			t.Errorf("(%s).Implements(%s) = %v, want %v", TypeString(xv), TypeString(xt), b, tt.b)
    72  		}
    73  	}
    74  }
    75  
    76  var assignableTests = []struct {
    77  	x interface{}
    78  	t interface{}
    79  	b bool
    80  }{
    81  	{new(chan int), new(<-chan int), true},
    82  	{new(<-chan int), new(chan int), false},
    83  	{new(*int), new(IntPtr), true},
    84  	{new(IntPtr), new(*int), true},
    85  	{new(IntPtr), new(IntPtr1), false},
    86  	{new(Ch), new(<-chan interface{}), true},
    87  	// test runs implementsTests too
    88  }
    89  
    90  type IntPtr *int
    91  type IntPtr1 *int
    92  type Ch <-chan interface{}
    93  
    94  func TestAssignableTo(t *testing.T) {
    95  	for i, tt := range append(assignableTests, implementsTests...) {
    96  		xv := TypeOf(tt.x).Elem()
    97  		xt := TypeOf(tt.t).Elem()
    98  		if b := xv.AssignableTo(xt); b != tt.b {
    99  			t.Errorf("%d:AssignableTo: got %v, want %v", i, b, tt.b)
   100  		}
   101  	}
   102  }