vitess.io/vitess@v0.16.2/go/vt/vtgate/vindexes/xxhash_test.go (about) 1 /* 2 Copyright 2019 The Vitess Authors. 3 4 Licensed under the Apache License, Version 2.0 (the "License"); 5 you may not use this file except in compliance with the License. 6 You may obtain a copy of the License at 7 8 http://www.apache.org/licenses/LICENSE-2.0 9 10 Unless required by applicable law or agreed to in writing, software 11 distributed under the License is distributed on an "AS IS" BASIS, 12 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 See the License for the specific language governing permissions and 14 limitations under the License. 15 */ 16 17 package vindexes 18 19 import ( 20 "bytes" 21 "context" 22 "encoding/hex" 23 "fmt" 24 "reflect" 25 "testing" 26 27 "github.com/stretchr/testify/assert" 28 29 "vitess.io/vitess/go/sqltypes" 30 "vitess.io/vitess/go/vt/key" 31 ) 32 33 var xxHash SingleColumn 34 35 func init() { 36 hv, err := CreateVindex("xxhash", "xxhash_name", map[string]string{"Table": "t", "Column": "c"}) 37 if err != nil { 38 panic(err) 39 } 40 xxHash = hv.(SingleColumn) 41 } 42 43 func TestXXHashInfo(t *testing.T) { 44 assert.Equal(t, 1, xxHash.Cost()) 45 assert.Equal(t, "xxhash_name", xxHash.String()) 46 assert.True(t, xxHash.IsUnique()) 47 assert.False(t, xxHash.NeedsVCursor()) 48 } 49 50 func TestXXHashMap(t *testing.T) { 51 tcases := []struct { 52 in sqltypes.Value 53 out []byte 54 }{{ 55 in: sqltypes.NewVarChar("test1"), 56 out: []byte{0xd0, 0x1a, 0xb7, 0xe4, 0xd6, 0x97, 0x8f, 0xb}, 57 }, { 58 in: sqltypes.NewVarChar("test2"), 59 out: []byte{0x87, 0xeb, 0x11, 0x71, 0x4c, 0xa, 0xe, 0x89}, 60 }, { 61 in: sqltypes.NewVarChar("testaverylongvaluetomakesurethisworks"), 62 out: []byte{0x81, 0xd8, 0xc3, 0x8e, 0xd, 0x85, 0xe, 0x6a}, 63 }, { 64 in: sqltypes.NewInt64(1), 65 out: []byte{0xd4, 0x64, 0x5, 0x36, 0x76, 0x12, 0xb4, 0xb7}, 66 }, { 67 in: sqltypes.NULL, 68 out: []byte{0x99, 0xe9, 0xd8, 0x51, 0x37, 0xdb, 0x46, 0xef}, 69 }, { 70 in: sqltypes.NewInt64(-1), 71 out: []byte{0xd8, 0xe2, 0xa6, 0xa7, 0xc8, 0xc7, 0x62, 0x3d}, 72 }, { 73 in: sqltypes.NewUint64(18446744073709551615), 74 out: []byte{0x47, 0x7c, 0xfa, 0x8d, 0x6d, 0x8f, 0x1f, 0x8d}, 75 }, { 76 in: sqltypes.NewInt64(9223372036854775807), 77 out: []byte{0xb3, 0x7e, 0xb0, 0x1f, 0x7b, 0xff, 0xaf, 0xd8}, 78 }, { 79 in: sqltypes.NewUint64(9223372036854775807), 80 out: []byte{0xb3, 0x7e, 0xb0, 0x1f, 0x7b, 0xff, 0xaf, 0xd8}, 81 }, { 82 in: sqltypes.NewInt64(-9223372036854775808), 83 out: []byte{0x10, 0x2c, 0x27, 0xdd, 0xb2, 0x6a, 0x60, 0x9e}, 84 }} 85 86 for _, tcase := range tcases { 87 got, err := xxHash.Map(context.Background(), nil, []sqltypes.Value{tcase.in}) 88 if err != nil { 89 t.Error(err) 90 } 91 out := []byte(got[0].(key.DestinationKeyspaceID)) 92 if !bytes.Equal(tcase.out, out) { 93 t.Errorf("Map(%#v): %#v, want %#v", tcase.in, out, tcase.out) 94 } 95 } 96 } 97 98 func TestXXHashVerify(t *testing.T) { 99 hexValStr := "9efa" 100 hexValStrSQL := fmt.Sprintf("x'%s'", hexValStr) 101 hexNumStrSQL := fmt.Sprintf("0x%s", hexValStr) 102 hexBytes, _ := hex.DecodeString(hexValStr) 103 ids := []sqltypes.Value{sqltypes.NewUint64(1), sqltypes.NewUint64(2), sqltypes.NewHexVal([]byte(hexValStrSQL)), sqltypes.NewHexNum([]byte(hexNumStrSQL))} 104 ksids := [][]byte{{0xd4, 0x64, 0x5, 0x36, 0x76, 0x12, 0xb4, 0xb7}, {0xd4, 0x64, 0x5, 0x36, 0x76, 0x12, 0xb4, 0xb7}, vXXHash(hexBytes), vXXHash(hexBytes)} 105 got, err := xxHash.Verify(context.Background(), nil, ids, ksids) 106 if err != nil { 107 t.Fatal(err) 108 } 109 want := []bool{true, false, true, true} 110 if !reflect.DeepEqual(got, want) { 111 t.Errorf("xxHash.Verify: %v, want %v", got, want) 112 } 113 } 114 115 func BenchmarkXXHash(b *testing.B) { 116 for _, benchSize := range []struct { 117 name string 118 n int 119 }{ 120 {"8B", 8}, 121 {"32B", 32}, 122 {"64B", 64}, 123 {"512B", 512}, 124 {"1KB", 1e3}, 125 {"4KB", 4e3}, 126 } { 127 input := make([]byte, benchSize.n) 128 for i := range input { 129 input[i] = byte(i) 130 } 131 132 name := fmt.Sprintf("xxHash,direct,bytes,n=%s", benchSize.name) 133 b.Run(name, func(b *testing.B) { 134 benchmarkXXHashBytes(b, input) 135 }) 136 137 } 138 } 139 140 var sinkXXHash []byte 141 142 func benchmarkXXHashBytes(b *testing.B, input []byte) { 143 b.SetBytes(int64(len(input))) 144 for i := 0; i < b.N; i++ { 145 sinkXXHash = vXXHash(input) 146 } 147 }