1 files changed, 95 insertions, 0 deletions
diff --git a/libgo/go/compress/zlib/reader_test.go b/libgo/go/compress/zlib/reader_test.go
new file mode 100644
index 0000000000..eaefc3a361
--- /dev/null
+++ b/libgo/go/compress/zlib/reader_test.go
@@ -0,0 +1,95 @@
+// 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{
+	{
+		"empty",
+		"",
+		[]byte{0x78, 0x9c, 0x03, 0x00, 0x00, 0x00, 0x00, 0x01},
+		nil,
+	},
+	{
+		"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,
+	},
+	{
+		"bad header",
+		"",
+		[]byte{0x78, 0x9f, 0x03, 0x00, 0x00, 0x00, 0x00, 0x01},
+		HeaderError,
+	},
+	{
+		"bad checksum",
+		"",
+		[]byte{0x78, 0x9c, 0x03, 0x00, 0x00, 0x00, 0x00, 0xff},
+		ChecksumError,
+	},
+	{
+		"not enough data",
+		"",
+		[]byte{0x78, 0x9c, 0x03, 0x00, 0x00, 0x00},
+		io.ErrUnexpectedEOF,
+	},
+	{
+		"excess data is silently ignored",
+		"",
+		[]byte{
+			0x78, 0x9c, 0x03, 0x00, 0x00, 0x00, 0x00, 0x01,
+			0x78, 0x9c, 0xff,
+		},
+		nil,
+	},
+}
+
+func TestDecompressor(t *testing.T) {
+	b := new(bytes.Buffer)
+	for _, tt := range zlibTests {
+		in := bytes.NewBuffer(tt.compressed)
+		zlib, err := NewReader(in)
+		if err != nil {
+			if err != tt.err {
+				t.Errorf("%s: NewReader: %s", tt.desc, err)
+			}
+			continue
+		}
+		defer zlib.Close()
+		b.Reset()
+		n, err := io.Copy(b, zlib)
+		if err != nil {
+			if err != tt.err {
+				t.Errorf("%s: io.Copy: %v want %v", tt.desc, err, tt.err)
+			}
+			continue
+		}
+		s := b.String()
+		if s != tt.raw {
+			t.Errorf("%s: got %d-byte %q want %d-byte %q", tt.desc, n, s, len(tt.raw), tt.raw)
+		}
+	}
+}