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Diffstat (limited to 'src/hash/crc64/crc64_test.go')
-rw-r--r-- | src/hash/crc64/crc64_test.go | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/src/hash/crc64/crc64_test.go b/src/hash/crc64/crc64_test.go new file mode 100644 index 000000000..81a87b56e --- /dev/null +++ b/src/hash/crc64/crc64_test.go @@ -0,0 +1,81 @@ +// 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 crc64 + +import ( + "io" + "testing" +) + +type test struct { + out uint64 + in string +} + +var golden = []test{ + {0x0, ""}, + {0x3420000000000000, "a"}, + {0x36c4200000000000, "ab"}, + {0x3776c42000000000, "abc"}, + {0x336776c420000000, "abcd"}, + {0x32d36776c4200000, "abcde"}, + {0x3002d36776c42000, "abcdef"}, + {0x31b002d36776c420, "abcdefg"}, + {0xe21b002d36776c4, "abcdefgh"}, + {0x8b6e21b002d36776, "abcdefghi"}, + {0x7f5b6e21b002d367, "abcdefghij"}, + {0x8ec0e7c835bf9cdf, "Discard medicine more than two years old."}, + {0xc7db1759e2be5ab4, "He who has a shady past knows that nice guys finish last."}, + {0xfbf9d9603a6fa020, "I wouldn't marry him with a ten foot pole."}, + {0xeafc4211a6daa0ef, "Free! Free!/A trip/to Mars/for 900/empty jars/Burma Shave"}, + {0x3e05b21c7a4dc4da, "The days of the digital watch are numbered. -Tom Stoppard"}, + {0x5255866ad6ef28a6, "Nepal premier won't resign."}, + {0x8a79895be1e9c361, "For every action there is an equal and opposite government program."}, + {0x8878963a649d4916, "His money is twice tainted: 'taint yours and 'taint mine."}, + {0xa7b9d53ea87eb82f, "There is no reason for any individual to have a computer in their home. -Ken Olsen, 1977"}, + {0xdb6805c0966a2f9c, "It's a tiny change to the code and not completely disgusting. - Bob Manchek"}, + {0xf3553c65dacdadd2, "size: a.out: bad magic"}, + {0x9d5e034087a676b9, "The major problem is with sendmail. -Mark Horton"}, + {0xa6db2d7f8da96417, "Give me a rock, paper and scissors and I will move the world. CCFestoon"}, + {0x325e00cd2fe819f9, "If the enemy is within range, then so are you."}, + {0x88c6600ce58ae4c6, "It's well we cannot hear the screams/That we create in others' dreams."}, + {0x28c4a3f3b769e078, "You remind me of a TV show, but that's all right: I watch it anyway."}, + {0xa698a34c9d9f1dca, "C is as portable as Stonehedge!!"}, + {0xf6c1e2a8c26c5cfc, "Even if I could be Shakespeare, I think I should still choose to be Faraday. - A. Huxley"}, + {0xd402559dfe9b70c, "The fugacity of a constituent in a mixture of gases at a given temperature is proportional to its mole fraction. Lewis-Randall Rule"}, + {0xdb6efff26aa94946, "How can you write a big system without C++? -Paul Glick"}, +} + +var tab = MakeTable(ISO) + +func TestGolden(t *testing.T) { + for i := 0; i < len(golden); i++ { + g := golden[i] + c := New(tab) + io.WriteString(c, g.in) + s := c.Sum64() + if s != g.out { + t.Errorf("crc64(%s) = 0x%x want 0x%x", g.in, s, g.out) + t.FailNow() + } + } +} + +func BenchmarkCrc64KB(b *testing.B) { + b.SetBytes(1024) + data := make([]byte, 1024) + for i := range data { + data[i] = byte(i) + } + h := New(tab) + in := make([]byte, 0, h.Size()) + + b.ResetTimer() + for i := 0; i < b.N; i++ { + h.Reset() + h.Write(data) + h.Sum(in) + } +} |