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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 flate
import (
"bytes";
"fmt";
"io";
"os";
"testing";
)
type deflateTest struct {
in []byte;
level int;
out []byte;
}
type deflateInflateTest struct {
in []byte;
}
type reverseBitsTest struct {
in uint16;
bitCount uint8;
out uint16;
}
var deflateTests = []*deflateTest{
&deflateTest{[]byte{}, 0, []byte{1, 0, 0, 255, 255}},
&deflateTest{[]byte{0x11}, -1, []byte{18, 4, 4, 0, 0, 255, 255}},
&deflateTest{[]byte{0x11}, DefaultCompression, []byte{18, 4, 4, 0, 0, 255, 255}},
&deflateTest{[]byte{0x11}, 4, []byte{18, 4, 4, 0, 0, 255, 255}},
&deflateTest{[]byte{0x11}, 0, []byte{0, 1, 0, 254, 255, 17, 1, 0, 0, 255, 255}},
&deflateTest{[]byte{0x11, 0x12}, 0, []byte{0, 2, 0, 253, 255, 17, 18, 1, 0, 0, 255, 255}},
&deflateTest{[]byte{0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11}, 0,
[]byte{0, 8, 0, 247, 255, 17, 17, 17, 17, 17, 17, 17, 17, 1, 0, 0, 255, 255},
},
&deflateTest{[]byte{}, 1, []byte{1, 0, 0, 255, 255}},
&deflateTest{[]byte{0x11}, 1, []byte{18, 4, 4, 0, 0, 255, 255}},
&deflateTest{[]byte{0x11, 0x12}, 1, []byte{18, 20, 2, 4, 0, 0, 255, 255}},
&deflateTest{[]byte{0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11}, 1, []byte{18, 132, 2, 64, 0, 0, 0, 255, 255}},
&deflateTest{[]byte{}, 9, []byte{1, 0, 0, 255, 255}},
&deflateTest{[]byte{0x11}, 9, []byte{18, 4, 4, 0, 0, 255, 255}},
&deflateTest{[]byte{0x11, 0x12}, 9, []byte{18, 20, 2, 4, 0, 0, 255, 255}},
&deflateTest{[]byte{0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11}, 9, []byte{18, 132, 2, 64, 0, 0, 0, 255, 255}},
}
var deflateInflateTests = []*deflateInflateTest{
&deflateInflateTest{[]byte{}},
&deflateInflateTest{[]byte{0x11}},
&deflateInflateTest{[]byte{0x11, 0x12}},
&deflateInflateTest{[]byte{0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11}},
&deflateInflateTest{[]byte{0x11, 0x10, 0x13, 0x41, 0x21, 0x21, 0x41, 0x13, 0x87, 0x78, 0x13}},
&deflateInflateTest{getLargeDataChunk()},
}
var reverseBitsTests = []*reverseBitsTest{
&reverseBitsTest{1, 1, 1},
&reverseBitsTest{1, 2, 2},
&reverseBitsTest{1, 3, 4},
&reverseBitsTest{1, 4, 8},
&reverseBitsTest{1, 5, 16},
&reverseBitsTest{17, 5, 17},
&reverseBitsTest{257, 9, 257},
&reverseBitsTest{29, 5, 23},
}
func getLargeDataChunk() []byte {
result := make([]byte, 100000);
for i := range result {
result[i] = byte(int64(i) * int64(i) & 0xFF)
}
return result;
}
func TestDeflate(t *testing.T) {
for _, h := range deflateTests {
buffer := bytes.NewBuffer([]byte{});
w := NewDeflater(buffer, h.level);
w.Write(h.in);
w.Close();
if bytes.Compare(buffer.Bytes(), h.out) != 0 {
t.Errorf("buffer is wrong; level = %v, buffer.Bytes() = %v, expected output = %v",
h.level, buffer.Bytes(), h.out)
}
}
}
func testToFromWithLevel(t *testing.T, level int, input []byte, name string) os.Error {
buffer := bytes.NewBuffer([]byte{});
w := NewDeflater(buffer, level);
w.Write(input);
w.Close();
inflater := NewInflater(buffer);
decompressed, err := io.ReadAll(inflater);
if err != nil {
t.Errorf("reading inflater: %s", err);
return err;
}
inflater.Close();
if bytes.Compare(input, decompressed) != 0 {
t.Errorf("decompress(compress(data)) != data: level=%d input=%s", level, name)
}
return nil;
}
func testToFrom(t *testing.T, input []byte, name string) {
for i := 0; i < 10; i++ {
testToFromWithLevel(t, i, input, name)
}
}
func TestDeflateInflate(t *testing.T) {
for i, h := range deflateInflateTests {
testToFrom(t, h.in, fmt.Sprintf("#%d", i))
}
}
func TestReverseBits(t *testing.T) {
for _, h := range reverseBitsTests {
if v := reverseBits(h.in, h.bitCount); v != h.out {
t.Errorf("reverseBits(%v,%v) = %v, want %v",
h.in, h.bitCount, v, h.out)
}
}
}
func TestDeflateInflateString(t *testing.T) {
gold := bytes.NewBufferString(getEdata()).Bytes();
testToFromWithLevel(t, 1, gold, "2.718281828...");
}
func getEdata() string {
return "2.718281828459045235360287471352662497757247093699959574966967627724076630353547" +
"59457138217852516642742746639193200305992181741359662904357290033429526059563073" +
"81323286279434907632338298807531952510190115738341879307021540891499348841675092" +
"44761460668082264800168477411853742345442437107539077744992069551702761838606261" +
"33138458300075204493382656029760673711320070932870912744374704723069697720931014" +
"16928368190255151086574637721112523897844250569536967707854499699679468644549059" +
"87931636889230098793127736178215424999229576351482208269895193668033182528869398" +
"49646510582093923982948879332036250944311730123819706841614039701983767932068328" +
"23764648042953118023287825098194558153017567173613320698112509961818815930416903" +
"51598888519345807273866738589422879228499892086805825749279610484198444363463244" +
"96848756023362482704197862320900216099023530436994184914631409343173814364054625" +
"31520961836908887070167683964243781405927145635490613031072085103837505101157477" +
"04171898610687396965521267154688957035035402123407849819334321068170121005627880" +
"23519303322474501585390473041995777709350366041699732972508868769664035557071622" +
"68447162560798826517871341951246652010305921236677194325278675398558944896970964" +
"09754591856956380236370162112047742722836489613422516445078182442352948636372141" +
"74023889344124796357437026375529444833799801612549227850925778256209262264832627" +
"79333865664816277251640191059004916449982893150566047258027786318641551956532442" +
"58698294695930801915298721172556347546396447910145904090586298496791287406870504" +
"89585867174798546677575732056812884592054133405392200011378630094556068816674001" +
"69842055804033637953764520304024322566135278369511778838638744396625322498506549" +
"95886234281899707733276171783928034946501434558897071942586398772754710962953741" +
"52111513683506275260232648472870392076431005958411661205452970302364725492966693" +
"81151373227536450988890313602057248176585118063036442812314965507047510254465011" +
"72721155519486685080036853228183152196003735625279449515828418829478761085263981" +
"39559900673764829224437528718462457803619298197139914756448826260390338144182326" +
"25150974827987779964373089970388867782271383605772978824125611907176639465070633" +
"04527954661855096666185664709711344474016070462621568071748187784437143698821855" +
"96709591025968620023537185887485696522000503117343920732113908032936344797273559" +
"55277349071783793421637012050054513263835440001863239914907054797780566978533580" +
"48966906295119432473099587655236812859041383241160722602998330535370876138939639" +
"17795745401613722361878936526053815584158718692553860616477983402543512843961294" +
"60352913325942794904337299085731580290958631382683291477116396337092400316894586" +
"36060645845925126994655724839186564209752685082307544254599376917041977780085362" +
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"07763603462459278778465850656050780844211529697521890874019660906651803516501792" +
"50461950136658543663271254963990854914420001457476081930221206602433009641270489" +
"43903971771951806990869986066365832322787093765022601492910115171776359446020232" +
"49300280401867723910288097866605651183260043688508817157238669842242201024950551" +
"88169480322100251542649463981287367765892768816359831247788652014117411091360116" +
"49950766290779436460058519419985601626479076153210387275571269925182756879893027" +
"61761146162549356495903798045838182323368612016243736569846703785853305275833337" +
"93990752166069238053369887956513728559388349989470741618155012539706464817194670" +
"83481972144888987906765037959036696724949925452790337296361626589760394985767413" +
"97359441023744329709355477982629614591442936451428617158587339746791897571211956" +
"18738578364475844842355558105002561149239151889309946342841393608038309166281881" +
"15037152849670597416256282360921680751501777253874025642534708790891372917228286" +
"11515915683725241630772254406337875931059826760944203261924285317018781772960235" +
"41306067213604600038966109364709514141718577701418060644363681546444005331608778" +
"31431744408119494229755993140118886833148328027065538330046932901157441475631399" +
"97221703804617092894579096271662260740718749975359212756084414737823303270330168" +
"23719364800217328573493594756433412994302485023573221459784328264142168487872167" +
"33670106150942434569844018733128101079451272237378861260581656680537143961278887" +
"32527373890392890506865324138062796025930387727697783792868409325365880733988457" +
"21874602100531148335132385004782716937621800490479559795929059165547050577751430" +
"81751126989851884087185640260353055837378324229241856256442550226721559802740126" +
"17971928047139600689163828665277009752767069777036439260224372841840883251848770" +
"47263844037953016690546593746161932384036389313136432713768884102681121989127522" +
"30562567562547017250863497653672886059667527408686274079128565769963137897530346" +
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"83965435885668550377313129658797581050121491620765676995065971534476347032085321" +
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"33613038829431040800296873869117066666146800015121143442256023874474325250769387" +
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"06498829184543953015299820925030054982570433905535701686531205264956148572492573" +
"86206917403695213533732531666345466588597286659451136441370331393672118569553952" +
"10845840724432383558606310680696492485123263269951460359603729725319836842336390" +
"46321367101161928217111502828016044880588023820319814930963695967358327420249882" +
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"98683703730220047531433818109270803001720593553052070070607223399946399057131158" +
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"07943800566633648843650891448055710397652146960276625835990519870423001794655367" +
"9"
}
|
