| // Copyright 2011 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package fnv |
| |
| import ( |
| "bytes" |
| "encoding/binary" |
| "hash" |
| "testing" |
| ) |
| |
| type golden struct { |
| sum []byte |
| text string |
| } |
| |
| var golden32 = []golden{ |
| {[]byte{0x81, 0x1c, 0x9d, 0xc5}, ""}, |
| {[]byte{0x05, 0x0c, 0x5d, 0x7e}, "a"}, |
| {[]byte{0x70, 0x77, 0x2d, 0x38}, "ab"}, |
| {[]byte{0x43, 0x9c, 0x2f, 0x4b}, "abc"}, |
| } |
| |
| var golden32a = []golden{ |
| {[]byte{0x81, 0x1c, 0x9d, 0xc5}, ""}, |
| {[]byte{0xe4, 0x0c, 0x29, 0x2c}, "a"}, |
| {[]byte{0x4d, 0x25, 0x05, 0xca}, "ab"}, |
| {[]byte{0x1a, 0x47, 0xe9, 0x0b}, "abc"}, |
| } |
| |
| var golden64 = []golden{ |
| {[]byte{0xcb, 0xf2, 0x9c, 0xe4, 0x84, 0x22, 0x23, 0x25}, ""}, |
| {[]byte{0xaf, 0x63, 0xbd, 0x4c, 0x86, 0x01, 0xb7, 0xbe}, "a"}, |
| {[]byte{0x08, 0x32, 0x67, 0x07, 0xb4, 0xeb, 0x37, 0xb8}, "ab"}, |
| {[]byte{0xd8, 0xdc, 0xca, 0x18, 0x6b, 0xaf, 0xad, 0xcb}, "abc"}, |
| } |
| |
| var golden64a = []golden{ |
| {[]byte{0xcb, 0xf2, 0x9c, 0xe4, 0x84, 0x22, 0x23, 0x25}, ""}, |
| {[]byte{0xaf, 0x63, 0xdc, 0x4c, 0x86, 0x01, 0xec, 0x8c}, "a"}, |
| {[]byte{0x08, 0x9c, 0x44, 0x07, 0xb5, 0x45, 0x98, 0x6a}, "ab"}, |
| {[]byte{0xe7, 0x1f, 0xa2, 0x19, 0x05, 0x41, 0x57, 0x4b}, "abc"}, |
| } |
| |
| var golden128 = []golden{ |
| {[]byte{0x6c, 0x62, 0x27, 0x2e, 0x07, 0xbb, 0x01, 0x42, 0x62, 0xb8, 0x21, 0x75, 0x62, 0x95, 0xc5, 0x8d}, ""}, |
| {[]byte{0xd2, 0x28, 0xcb, 0x69, 0x10, 0x1a, 0x8c, 0xaf, 0x78, 0x91, 0x2b, 0x70, 0x4e, 0x4a, 0x14, 0x1e}, "a"}, |
| {[]byte{0x8, 0x80, 0x94, 0x5a, 0xee, 0xab, 0x1b, 0xe9, 0x5a, 0xa0, 0x73, 0x30, 0x55, 0x26, 0xc0, 0x88}, "ab"}, |
| {[]byte{0xa6, 0x8b, 0xb2, 0xa4, 0x34, 0x8b, 0x58, 0x22, 0x83, 0x6d, 0xbc, 0x78, 0xc6, 0xae, 0xe7, 0x3b}, "abc"}, |
| } |
| |
| var golden128a = []golden{ |
| {[]byte{0x6c, 0x62, 0x27, 0x2e, 0x07, 0xbb, 0x01, 0x42, 0x62, 0xb8, 0x21, 0x75, 0x62, 0x95, 0xc5, 0x8d}, ""}, |
| {[]byte{0xd2, 0x28, 0xcb, 0x69, 0x6f, 0x1a, 0x8c, 0xaf, 0x78, 0x91, 0x2b, 0x70, 0x4e, 0x4a, 0x89, 0x64}, "a"}, |
| {[]byte{0x08, 0x80, 0x95, 0x44, 0xbb, 0xab, 0x1b, 0xe9, 0x5a, 0xa0, 0x73, 0x30, 0x55, 0xb6, 0x9a, 0x62}, "ab"}, |
| {[]byte{0xa6, 0x8d, 0x62, 0x2c, 0xec, 0x8b, 0x58, 0x22, 0x83, 0x6d, 0xbc, 0x79, 0x77, 0xaf, 0x7f, 0x3b}, "abc"}, |
| } |
| |
| func TestGolden32(t *testing.T) { |
| testGolden(t, New32(), golden32) |
| } |
| |
| func TestGolden32a(t *testing.T) { |
| testGolden(t, New32a(), golden32a) |
| } |
| |
| func TestGolden64(t *testing.T) { |
| testGolden(t, New64(), golden64) |
| } |
| |
| func TestGolden64a(t *testing.T) { |
| testGolden(t, New64a(), golden64a) |
| } |
| |
| func TestGolden128(t *testing.T) { |
| testGolden(t, New128(), golden128) |
| } |
| |
| func TestGolden128a(t *testing.T) { |
| testGolden(t, New128a(), golden128a) |
| } |
| |
| func testGolden(t *testing.T, hash hash.Hash, gold []golden) { |
| for _, g := range gold { |
| hash.Reset() |
| done, error := hash.Write([]byte(g.text)) |
| if error != nil { |
| t.Fatalf("write error: %s", error) |
| } |
| if done != len(g.text) { |
| t.Fatalf("wrote only %d out of %d bytes", done, len(g.text)) |
| } |
| if actual := hash.Sum(nil); !bytes.Equal(g.sum, actual) { |
| t.Errorf("hash(%q) = 0x%x want 0x%x", g.text, actual, g.sum) |
| } |
| } |
| } |
| |
| func TestIntegrity32(t *testing.T) { |
| testIntegrity(t, New32()) |
| } |
| |
| func TestIntegrity32a(t *testing.T) { |
| testIntegrity(t, New32a()) |
| } |
| |
| func TestIntegrity64(t *testing.T) { |
| testIntegrity(t, New64()) |
| } |
| |
| func TestIntegrity64a(t *testing.T) { |
| testIntegrity(t, New64a()) |
| } |
| func TestIntegrity128(t *testing.T) { |
| testIntegrity(t, New128()) |
| } |
| |
| func TestIntegrity128a(t *testing.T) { |
| testIntegrity(t, New128a()) |
| } |
| |
| func testIntegrity(t *testing.T, h hash.Hash) { |
| data := []byte{'1', '2', 3, 4, 5} |
| h.Write(data) |
| sum := h.Sum(nil) |
| |
| if size := h.Size(); size != len(sum) { |
| t.Fatalf("Size()=%d but len(Sum())=%d", size, len(sum)) |
| } |
| |
| if a := h.Sum(nil); !bytes.Equal(sum, a) { |
| t.Fatalf("first Sum()=0x%x, second Sum()=0x%x", sum, a) |
| } |
| |
| h.Reset() |
| h.Write(data) |
| if a := h.Sum(nil); !bytes.Equal(sum, a) { |
| t.Fatalf("Sum()=0x%x, but after Reset() Sum()=0x%x", sum, a) |
| } |
| |
| h.Reset() |
| h.Write(data[:2]) |
| h.Write(data[2:]) |
| if a := h.Sum(nil); !bytes.Equal(sum, a) { |
| t.Fatalf("Sum()=0x%x, but with partial writes, Sum()=0x%x", sum, a) |
| } |
| |
| switch h.Size() { |
| case 4: |
| sum32 := h.(hash.Hash32).Sum32() |
| if sum32 != binary.BigEndian.Uint32(sum) { |
| t.Fatalf("Sum()=0x%x, but Sum32()=0x%x", sum, sum32) |
| } |
| case 8: |
| sum64 := h.(hash.Hash64).Sum64() |
| if sum64 != binary.BigEndian.Uint64(sum) { |
| t.Fatalf("Sum()=0x%x, but Sum64()=0x%x", sum, sum64) |
| } |
| case 16: |
| // There's no Sum128 function, so we don't need to test anything here. |
| } |
| } |
| |
| func BenchmarkFnv32KB(b *testing.B) { |
| benchmarkKB(b, New32()) |
| } |
| |
| func BenchmarkFnv32aKB(b *testing.B) { |
| benchmarkKB(b, New32a()) |
| } |
| |
| func BenchmarkFnv64KB(b *testing.B) { |
| benchmarkKB(b, New64()) |
| } |
| |
| func BenchmarkFnv64aKB(b *testing.B) { |
| benchmarkKB(b, New64a()) |
| } |
| |
| func BenchmarkFnv128KB(b *testing.B) { |
| benchmarkKB(b, New128()) |
| } |
| |
| func BenchmarkFnv128aKB(b *testing.B) { |
| benchmarkKB(b, New128a()) |
| } |
| |
| func benchmarkKB(b *testing.B, h hash.Hash) { |
| b.SetBytes(1024) |
| data := make([]byte, 1024) |
| for i := range data { |
| data[i] = byte(i) |
| } |
| in := make([]byte, 0, h.Size()) |
| |
| b.ResetTimer() |
| for i := 0; i < b.N; i++ { |
| h.Reset() |
| h.Write(data) |
| h.Sum(in) |
| } |
| } |