src/pkg/hash/crc32/crc32_test.go

// 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 crc32

import (
	"hash/crc32";
	"io";
	"testing";
)

type _Crc32Test struct {
	out uint32;
	in string;
}

var golden = []_Crc32Test {
	_Crc32Test{ 0x0, "" },
	_Crc32Test{ 0xe8b7be43, "a" },
	_Crc32Test{ 0x9e83486d, "ab" },
	_Crc32Test{ 0x352441c2, "abc" },
	_Crc32Test{ 0xed82cd11, "abcd" },
	_Crc32Test{ 0x8587d865, "abcde" },
	_Crc32Test{ 0x4b8e39ef, "abcdef" },
	_Crc32Test{ 0x312a6aa6, "abcdefg" },
	_Crc32Test{ 0xaeef2a50, "abcdefgh" },
	_Crc32Test{ 0x8da988af, "abcdefghi" },
	_Crc32Test{ 0x3981703a, "abcdefghij" },
	_Crc32Test{ 0x6b9cdfe7, "Discard medicine more than two years old." },
	_Crc32Test{ 0xc90ef73f, "He who has a shady past knows that nice guys finish last." },
	_Crc32Test{ 0xb902341f, "I wouldn't marry him with a ten foot pole." },
	_Crc32Test{ 0x42080e8, "Free! Free!/A trip/to Mars/for 900/empty jars/Burma Shave" },
	_Crc32Test{ 0x154c6d11, "The days of the digital watch are numbered.  -Tom Stoppard" },
	_Crc32Test{ 0x4c418325, "Nepal premier won't resign." },
	_Crc32Test{ 0x33955150, "For every action there is an equal and opposite government program." },
	_Crc32Test{ 0x26216a4b, "His money is twice tainted: 'taint yours and 'taint mine." },
	_Crc32Test{ 0x1abbe45e, "There is no reason for any individual to have a computer in their home. -Ken Olsen, 1977" },
	_Crc32Test{ 0xc89a94f7, "It's a tiny change to the code and not completely disgusting. - Bob Manchek" },
	_Crc32Test{ 0xab3abe14, "size:  a.out:  bad magic" },
	_Crc32Test{ 0xbab102b6, "The major problem is with sendmail.  -Mark Horton" },
	_Crc32Test{ 0x999149d7, "Give me a rock, paper and scissors and I will move the world.  CCFestoon" },
	_Crc32Test{ 0x6d52a33c, "If the enemy is within range, then so are you." },
	_Crc32Test{ 0x90631e8d, "It's well we cannot hear the screams/That we create in others' dreams." },
	_Crc32Test{ 0x78309130, "You remind me of a TV show, but that's all right: I watch it anyway." },
	_Crc32Test{ 0x7d0a377f, "C is as portable as Stonehedge!!" },
	_Crc32Test{ 0x8c79fd79, "Even if I could be Shakespeare, I think I should still choose to be Faraday. - A. Huxley" },
	_Crc32Test{ 0xa20b7167, "The fugacity of a constituent in a mixture of gases at a given temperature is proportional to its mole fraction.  Lewis-Randall Rule" },
	_Crc32Test{ 0x8e0bb443, "How can you write a big system without C++?  -Paul Glick" },
}

func TestGolden(t *testing.T) {
	for i := 0; i < len(golden); i++ {
		g := golden[i];
		c := NewIEEE();
		io.WriteString(c, g.in);
		s := c.Sum32();
		if s != g.out {
			t.Errorf("crc32(%s) = 0x%x want 0x%x", g.in, s, g.out);
			t.FailNow();
		}
	}
}