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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 zlib
import (
"bytes";
"io";
"os";
"testing";
)
type zlibTest struct {
desc string;
raw string;
compressed []byte;
err os.Error;
}
// Compare-to-golden test data was generated by the ZLIB example program at
// http://www.zlib.net/zpipe.c
var zlibTests = []zlibTest {
zlibTest {
"empty",
"",
[]byte {
0x78, 0x9c, 0x03, 0x00, 0x00, 0x00, 0x00, 0x01,
},
nil
},
zlibTest {
"goodbye",
"goodbye, world",
[]byte {
0x78, 0x9c, 0x4b, 0xcf, 0xcf, 0x4f, 0x49, 0xaa,
0x4c, 0xd5, 0x51, 0x28, 0xcf, 0x2f, 0xca, 0x49,
0x01, 0x00, 0x28, 0xa5, 0x05, 0x5e,
},
nil
},
zlibTest {
"bad header",
"",
[]byte {
0x78, 0x9f, 0x03, 0x00, 0x00, 0x00, 0x00, 0x01,
},
HeaderError
},
zlibTest {
"bad checksum",
"",
[]byte {
0x78, 0x9c, 0x03, 0x00, 0x00, 0x00, 0x00, 0xff,
},
ChecksumError,
},
zlibTest {
"not enough data",
"",
[]byte {
0x78, 0x9c, 0x03, 0x00, 0x00, 0x00,
},
io.ErrUnexpectedEOF,
},
zlibTest {
"excess data is silently ignored",
"",
[]byte {
0x78, 0x9c, 0x03, 0x00, 0x00, 0x00, 0x00, 0x01,
0x78, 0x9c, 0xff,
},
nil,
},
}
func TestZlibInflater(t *testing.T) {
b := new(bytes.Buffer);
for i, tt := range zlibTests {
in := io.NewByteReader(tt.compressed);
zlib, err := NewZlibInflater(in);
if err != nil {
if err != tt.err {
t.Errorf("%s: NewZlibInflater: %s", tt.desc, err);
}
continue;
}
b.Reset();
n, err := io.Copy(zlib, b);
if err != nil {
if err != tt.err {
t.Errorf("%s: io.Copy: %v want %v", tt.desc, err, tt.err);
}
continue;
}
s := string(b.Data());
if s != tt.raw {
t.Errorf("%s: got %d-byte %q want %d-byte %q", tt.desc, n, s, len(tt.raw), tt.raw);
}
}
}
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