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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libgo/] [go/] [hash/] [fnv/] [fnv_test.go] - Blame information for rev 747

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Line No. Rev Author Line
1 747 jeremybenn 
// Copyright 2011 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package fnv
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import (
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        "bytes"
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        "encoding/binary"
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        "hash"
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        "testing"
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)
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const testDataSize = 40
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type golden struct {
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        sum  []byte
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        text string
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}
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var golden32 = []golden{
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        {[]byte{0x81, 0x1c, 0x9d, 0xc5}, ""},
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        {[]byte{0x05, 0x0c, 0x5d, 0x7e}, "a"},
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        {[]byte{0x70, 0x77, 0x2d, 0x38}, "ab"},
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        {[]byte{0x43, 0x9c, 0x2f, 0x4b}, "abc"},
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}
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var golden32a = []golden{
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        {[]byte{0x81, 0x1c, 0x9d, 0xc5}, ""},
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        {[]byte{0xe4, 0x0c, 0x29, 0x2c}, "a"},
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        {[]byte{0x4d, 0x25, 0x05, 0xca}, "ab"},
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        {[]byte{0x1a, 0x47, 0xe9, 0x0b}, "abc"},
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}
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var golden64 = []golden{
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        {[]byte{0xcb, 0xf2, 0x9c, 0xe4, 0x84, 0x22, 0x23, 0x25}, ""},
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        {[]byte{0xaf, 0x63, 0xbd, 0x4c, 0x86, 0x01, 0xb7, 0xbe}, "a"},
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        {[]byte{0x08, 0x32, 0x67, 0x07, 0xb4, 0xeb, 0x37, 0xb8}, "ab"},
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        {[]byte{0xd8, 0xdc, 0xca, 0x18, 0x6b, 0xaf, 0xad, 0xcb}, "abc"},
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}
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var golden64a = []golden{
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        {[]byte{0xcb, 0xf2, 0x9c, 0xe4, 0x84, 0x22, 0x23, 0x25}, ""},
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        {[]byte{0xaf, 0x63, 0xdc, 0x4c, 0x86, 0x01, 0xec, 0x8c}, "a"},
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        {[]byte{0x08, 0x9c, 0x44, 0x07, 0xb5, 0x45, 0x98, 0x6a}, "ab"},
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        {[]byte{0xe7, 0x1f, 0xa2, 0x19, 0x05, 0x41, 0x57, 0x4b}, "abc"},
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}
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func TestGolden32(t *testing.T) {
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        testGolden(t, New32(), golden32)
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}
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func TestGolden32a(t *testing.T) {
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        testGolden(t, New32a(), golden32a)
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}
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func TestGolden64(t *testing.T) {
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        testGolden(t, New64(), golden64)
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}
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func TestGolden64a(t *testing.T) {
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        testGolden(t, New64a(), golden64a)
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}
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func testGolden(t *testing.T, hash hash.Hash, gold []golden) {
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        for _, g := range gold {
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                hash.Reset()
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                done, error := hash.Write([]byte(g.text))
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                if error != nil {
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                        t.Fatalf("write error: %s", error)
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                }
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                if done != len(g.text) {
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                        t.Fatalf("wrote only %d out of %d bytes", done, len(g.text))
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                }
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                if actual := hash.Sum(nil); !bytes.Equal(g.sum, actual) {
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                        t.Errorf("hash(%q) = 0x%x want 0x%x", g.text, actual, g.sum)
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                }
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        }
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}
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func TestIntegrity32(t *testing.T) {
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        testIntegrity(t, New32())
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}
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func TestIntegrity32a(t *testing.T) {
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        testIntegrity(t, New32a())
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}
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func TestIntegrity64(t *testing.T) {
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        testIntegrity(t, New64())
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}
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func TestIntegrity64a(t *testing.T) {
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        testIntegrity(t, New64a())
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}
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func testIntegrity(t *testing.T, h hash.Hash) {
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        data := []byte{'1', '2', 3, 4, 5}
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        h.Write(data)
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        sum := h.Sum(nil)
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        if size := h.Size(); size != len(sum) {
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                t.Fatalf("Size()=%d but len(Sum())=%d", size, len(sum))
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        }
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        if a := h.Sum(nil); !bytes.Equal(sum, a) {
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                t.Fatalf("first Sum()=0x%x, second Sum()=0x%x", sum, a)
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        }
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        h.Reset()
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        h.Write(data)
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        if a := h.Sum(nil); !bytes.Equal(sum, a) {
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                t.Fatalf("Sum()=0x%x, but after Reset() Sum()=0x%x", sum, a)
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        }
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        h.Reset()
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        h.Write(data[:2])
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        h.Write(data[2:])
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        if a := h.Sum(nil); !bytes.Equal(sum, a) {
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                t.Fatalf("Sum()=0x%x, but with partial writes, Sum()=0x%x", sum, a)
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        }
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        switch h.Size() {
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        case 4:
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                sum32 := h.(hash.Hash32).Sum32()
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                if sum32 != binary.BigEndian.Uint32(sum) {
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                        t.Fatalf("Sum()=0x%x, but Sum32()=0x%x", sum, sum32)
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                }
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        case 8:
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                sum64 := h.(hash.Hash64).Sum64()
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                if sum64 != binary.BigEndian.Uint64(sum) {
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                        t.Fatalf("Sum()=0x%x, but Sum64()=0x%x", sum, sum64)
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                }
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        }
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}
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func Benchmark32(b *testing.B) {
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        benchmark(b, New32())
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}
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func Benchmark32a(b *testing.B) {
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        benchmark(b, New32a())
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}
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func Benchmark64(b *testing.B) {
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        benchmark(b, New64())
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}
148 
 
149 
func Benchmark64a(b *testing.B) {
150 
        benchmark(b, New64a())
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}
152 
 
153 
func benchmark(b *testing.B, h hash.Hash) {
154 
        b.ResetTimer()
155 
        b.SetBytes(testDataSize)
156 
        data := make([]byte, testDataSize)
157 
        for i := range data {
158 
                data[i] = byte(i + 'a')
159 
        }
160 
 
161 
        b.StartTimer()
162 
        for todo := b.N; todo != 0; todo-- {
163 
                h.Reset()
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                h.Write(data)
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                h.Sum(nil)
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        }
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}

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