1 files changed, 194 insertions, 0 deletions
diff --git a/libgo/go/encoding/git85/git_test.go b/libgo/go/encoding/git85/git_test.go
new file mode 100644
index 000000000..c76385c35
--- /dev/null
+++ b/libgo/go/encoding/git85/git_test.go
@@ -0,0 +1,194 @@
+// 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 git85
+
+import (
+	"bytes"
+	"io/ioutil"
+	"os"
+	"testing"
+)
+
+type testpair struct {
+	decoded, encoded string
+}
+
+func testEqual(t *testing.T, msg string, args ...interface{}) bool {
+	if args[len(args)-2] != args[len(args)-1] {
+		t.Errorf(msg, args...)
+		return false
+	}
+	return true
+}
+
+func TestGitTable(t *testing.T) {
+	var saw [256]bool
+	for i, c := range encode {
+		if decode[c] != uint8(i+1) {
+			t.Errorf("decode['%c'] = %d, want %d", c, decode[c], i+1)
+		}
+		saw[c] = true
+	}
+	for i, b := range saw {
+		if !b && decode[i] != 0 {
+			t.Errorf("decode[%d] = %d, want 0", i, decode[i])
+		}
+	}
+}
+
+var gitPairs = []testpair{
+	// Wikipedia example, adapted.
+	{
+		"Man is distinguished, not only by his reason, but by this singular passion from " +
+			"other animals, which is a lust of the mind, that by a perseverance of delight in " +
+			"the continued and indefatigable generation of knowledge, exceeds the short " +
+			"vehemence of any carnal pleasure.",
+
+		"zO<`^zX>%ZCX>)XGZfA9Ab7*B`EFf-gbRchTY<VDJc_3(Mb0BhMVRLV8EFfZabRc4R\n" +
+			"zAarPHb0BkRZfA9DVR9gFVRLh7Z*CxFa&K)QZ**v7av))DX>DO_b1WctXlY|;AZc?T\n" +
+			"zVIXXEb95kYW*~HEWgu;7Ze%PVbZB98AYyqSVIXj2a&u*NWpZI|V`U(3W*}r`Y-wj`\n" +
+			"zbRcPNAarPDAY*TCbZKsNWn>^>Ze$>7Ze(R<VRUI{VPb4$AZKN6WpZJ3X>V>IZ)PBC\n" +
+			"zZf|#NWn^b%EFfigV`XJzb0BnRWgv5CZ*p`Xc4cT~ZDnp_Wgu^6AYpEKAY);2ZeeU7\n" +
+			"IaBO8^b9HiME&u=k\n",
+	},
+}
+
+var gitBigtest = gitPairs[len(gitPairs)-1]
+
+func TestEncode(t *testing.T) {
+	for _, p := range gitPairs {
+		buf := make([]byte, EncodedLen(len(p.decoded)))
+		n := Encode(buf, []byte(p.decoded))
+		if n != len(buf) {
+			t.Errorf("EncodedLen does not agree with Encode")
+		}
+		buf = buf[0:n]
+		testEqual(t, "Encode(%q) = %q, want %q", p.decoded, string(buf), p.encoded)
+	}
+}
+
+func TestEncoder(t *testing.T) {
+	for _, p := range gitPairs {
+		bb := &bytes.Buffer{}
+		encoder := NewEncoder(bb)
+		encoder.Write([]byte(p.decoded))
+		encoder.Close()
+		testEqual(t, "Encode(%q) = %q, want %q", p.decoded, bb.String(), p.encoded)
+	}
+}
+
+func TestEncoderBuffering(t *testing.T) {
+	input := []byte(gitBigtest.decoded)
+	for bs := 1; bs <= 12; bs++ {
+		bb := &bytes.Buffer{}
+		encoder := NewEncoder(bb)
+		for pos := 0; pos < len(input); pos += bs {
+			end := pos + bs
+			if end > len(input) {
+				end = len(input)
+			}
+			n, err := encoder.Write(input[pos:end])
+			testEqual(t, "Write(%q) gave error %v, want %v", input[pos:end], err, os.Error(nil))
+			testEqual(t, "Write(%q) gave length %v, want %v", input[pos:end], n, end-pos)
+		}
+		err := encoder.Close()
+		testEqual(t, "Close gave error %v, want %v", err, os.Error(nil))
+		testEqual(t, "Encoding/%d of %q = %q, want %q", bs, gitBigtest.decoded, bb.String(), gitBigtest.encoded)
+	}
+}
+
+func TestDecode(t *testing.T) {
+	for _, p := range gitPairs {
+		dbuf := make([]byte, 4*len(p.encoded))
+		ndst, err := Decode(dbuf, []byte(p.encoded))
+		testEqual(t, "Decode(%q) = error %v, want %v", p.encoded, err, os.Error(nil))
+		testEqual(t, "Decode(%q) = ndst %v, want %v", p.encoded, ndst, len(p.decoded))
+		testEqual(t, "Decode(%q) = %q, want %q", p.encoded, string(dbuf[0:ndst]), p.decoded)
+	}
+}
+
+func TestDecoder(t *testing.T) {
+	for _, p := range gitPairs {
+		decoder := NewDecoder(bytes.NewBufferString(p.encoded))
+		dbuf, err := ioutil.ReadAll(decoder)
+		if err != nil {
+			t.Fatal("Read failed", err)
+		}
+		testEqual(t, "Read from %q = length %v, want %v", p.encoded, len(dbuf), len(p.decoded))
+		testEqual(t, "Decoding of %q = %q, want %q", p.encoded, string(dbuf), p.decoded)
+		if err != nil {
+			testEqual(t, "Read from %q = %v, want %v", p.encoded, err, os.EOF)
+		}
+	}
+}
+
+func TestDecoderBuffering(t *testing.T) {
+	for bs := 1; bs <= 12; bs++ {
+		decoder := NewDecoder(bytes.NewBufferString(gitBigtest.encoded))
+		buf := make([]byte, len(gitBigtest.decoded)+12)
+		var total int
+		for total = 0; total < len(gitBigtest.decoded); {
+			n, err := decoder.Read(buf[total : total+bs])
+			testEqual(t, "Read from %q at pos %d = %d, %v, want _, %v", gitBigtest.encoded, total, n, err, os.Error(nil))
+			total += n
+		}
+		testEqual(t, "Decoding/%d of %q = %q, want %q", bs, gitBigtest.encoded, string(buf[0:total]), gitBigtest.decoded)
+	}
+}
+
+func TestDecodeCorrupt(t *testing.T) {
+	type corrupt struct {
+		e string
+		p int
+	}
+	examples := []corrupt{
+		{"v", 0},
+		{"!z!!!!!!!!!", 0},
+	}
+
+	for _, e := range examples {
+		dbuf := make([]byte, 2*len(e.e))
+		_, err := Decode(dbuf, []byte(e.e))
+		switch err := err.(type) {
+		case CorruptInputError:
+			testEqual(t, "Corruption in %q at offset %v, want %v", e.e, int(err), e.p)
+		default:
+			t.Error("Decoder failed to detect corruption in", e)
+		}
+	}
+}
+
+func TestGitBig(t *testing.T) {
+	n := 3*1000 + 1
+	raw := make([]byte, n)
+	const alpha = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
+	for i := 0; i < n; i++ {
+		raw[i] = alpha[i%len(alpha)]
+	}
+	encoded := new(bytes.Buffer)
+	w := NewEncoder(encoded)
+	nn, err := w.Write(raw)
+	if nn != n || err != nil {
+		t.Fatalf("Encoder.Write(raw) = %d, %v want %d, nil", nn, err, n)
+	}
+	err = w.Close()
+	if err != nil {
+		t.Fatalf("Encoder.Close() = %v want nil", err)
+	}
+	decoded, err := ioutil.ReadAll(NewDecoder(encoded))
+	if err != nil {
+		t.Fatalf("ioutil.ReadAll(NewDecoder(...)): %v", err)
+	}
+
+	if !bytes.Equal(raw, decoded) {
+		var i int
+		for i = 0; i < len(decoded) && i < len(raw); i++ {
+			if decoded[i] != raw[i] {
+				break
+			}
+		}
+		t.Errorf("Decode(Encode(%d-byte string)) failed at offset %d", n, i)
+	}
+}