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// Copyright 2009 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 adler32

import (
        "bytes"
        "io"
        "testing"
)

type _Adler32Test struct {
        out uint32
        in  string
}

var golden = []_Adler32Test{
        {0x1, ""},
        {0x620062, "a"},
        {0x12600c4, "ab"},
        {0x24d0127, "abc"},
        {0x3d8018b, "abcd"},
        {0x5c801f0, "abcde"},
        {0x81e0256, "abcdef"},
        {0xadb02bd, "abcdefg"},
        {0xe000325, "abcdefgh"},
        {0x118e038e, "abcdefghi"},
        {0x158603f8, "abcdefghij"},
        {0x3f090f02, "Discard medicine more than two years old."},
        {0x46d81477, "He who has a shady past knows that nice guys finish last."},
        {0x40ee0ee1, "I wouldn't marry him with a ten foot pole."},
        {0x16661315, "Free! Free!/A trip/to Mars/for 900/empty jars/Burma Shave"},
        {0x5b2e1480, "The days of the digital watch are numbered.  -Tom Stoppard"},
        {0x8c3c09ea, "Nepal premier won't resign."},
        {0x45ac18fd, "For every action there is an equal and opposite government program."},
        {0x53c61462, "His money is twice tainted: 'taint yours and 'taint mine."},
        {0x7e511e63, "There is no reason for any individual to have a computer in their home. -Ken Olsen, 1977"},
        {0xe4801a6a, "It's a tiny change to the code and not completely disgusting. - Bob Manchek"},
        {0x61b507df, "size:  a.out:  bad magic"},
        {0xb8631171, "The major problem is with sendmail.  -Mark Horton"},
        {0x8b5e1904, "Give me a rock, paper and scissors and I will move the world.  CCFestoon"},
        {0x7cc6102b, "If the enemy is within range, then so are you."},
        {0x700318e7, "It's well we cannot hear the screams/That we create in others' dreams."},
        {0x1e601747, "You remind me of a TV show, but that's all right: I watch it anyway."},
        {0xb55b0b09, "C is as portable as Stonehedge!!"},
        {0x39111dd0, "Even if I could be Shakespeare, I think I should still choose to be Faraday. - A. Huxley"},
        {0x91dd304f, "The fugacity of a constituent in a mixture of gases at a given temperature is proportional to its mole fraction.  Lewis-Randall Rule"},
        {0x2e5d1316, "How can you write a big system without C++?  -Paul Glick"},
        {0xd0201df6, "'Invariant assertions' is the most elegant programming technique!  -Tom Szymanski"},
}

func TestGolden(t *testing.T) {
        for i := 0; i < len(golden); i++ {
                g := golden[i]
                c := New()
                io.WriteString(c, g.in)
                s := c.Sum32()
                if s != g.out {
                        t.Errorf("adler32(%s) = 0x%x want 0x%x", g.in, s, g.out)
                        t.FailNow()
                }
        }
}

func BenchmarkGolden(b *testing.B) {
        b.StopTimer()
        c := New()
        var buf bytes.Buffer
        for _, g := range golden {
                buf.Write([]byte(g.in))
        }
        b.StartTimer()
        for i := 0; i < b.N; i++ {
                c.Write(buf.Bytes())
        }
}