// Copyright 2012 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 flate
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import (
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"bytes"
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"io"
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"io/ioutil"
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"runtime"
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"strings"
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"testing"
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)
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func TestNlitOutOfRange(t *testing.T) {
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// Trying to decode this bogus flate data, which has a Huffman table
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// with nlit=288, should not panic.
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io.Copy(ioutil.Discard, NewReader(strings.NewReader(
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"\xfc\xfe\x36\xe7\x5e\x1c\xef\xb3\x55\x58\x77\xb6\x56\xb5\x43\xf4"+
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"\x6f\xf2\xd2\xe6\x3d\x99\xa0\x85\x8c\x48\xeb\xf8\xda\x83\x04\x2a"+
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"\x75\xc4\xf8\x0f\x12\x11\xb9\xb4\x4b\x09\xa0\xbe\x8b\x91\x4c")))
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}
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var suites = []struct{ name, file string }{
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// Digits is the digits of the irrational number e. Its decimal representation
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// does not repeat, but there are only 10 possible digits, so it should be
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// reasonably compressible.
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{"Digits", "../testdata/e.txt"},
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// Newton is Isaac Newtons's educational text on Opticks.
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{"Newton", "../../testdata/Isaac.Newton-Opticks.txt"},
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}
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func BenchmarkDecode(b *testing.B) {
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doBench(b, func(b *testing.B, buf0 []byte, level, n int) {
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b.ReportAllocs()
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b.StopTimer()
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b.SetBytes(int64(n))
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compressed := new(bytes.Buffer)
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w, err := NewWriter(compressed, level)
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if err != nil {
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b.Fatal(err)
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}
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for i := 0; i < n; i += len(buf0) {
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if len(buf0) > n-i {
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buf0 = buf0[:n-i]
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}
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io.Copy(w, bytes.NewReader(buf0))
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}
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w.Close()
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buf1 := compressed.Bytes()
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buf0, compressed, w = nil, nil, nil
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runtime.GC()
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b.StartTimer()
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for i := 0; i < b.N; i++ {
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io.Copy(ioutil.Discard, NewReader(bytes.NewReader(buf1)))
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}
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})
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}
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var levelTests = []struct {
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name string
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level int
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}{
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{"Huffman", HuffmanOnly},
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{"Speed", BestSpeed},
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{"Default", DefaultCompression},
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{"Compression", BestCompression},
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}
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var sizes = []struct {
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name string
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n int
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}{
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{"1e4", 1e4},
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{"1e5", 1e5},
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{"1e6", 1e6},
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}
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func doBench(b *testing.B, f func(b *testing.B, buf []byte, level, n int)) {
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for _, suite := range suites {
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buf, err := ioutil.ReadFile(suite.file)
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if err != nil {
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b.Fatal(err)
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}
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if len(buf) == 0 {
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b.Fatalf("test file %q has no data", suite.file)
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}
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for _, l := range levelTests {
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for _, s := range sizes {
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b.Run(suite.name+"/"+l.name+"/"+s.name, func(b *testing.B) {
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f(b, buf, l.level, s.n)
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})
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}
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}
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}
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}
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