1 files changed, 201 insertions, 0 deletions
diff --git a/src/pkg/encoding/base64/base64_test.go b/src/pkg/encoding/base64/base64_test.go
new file mode 100644
index 000000000..54d2326f5
--- /dev/null
+++ b/src/pkg/encoding/base64/base64_test.go
@@ -0,0 +1,201 @@
+// 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 base64
+
+import (
+	"bytes";
+	"io";
+	"os";
+	"reflect";
+	"strings";
+	"testing";
+)
+
+type testpair struct {
+	decoded, encoded string;
+}
+
+var pairs = []testpair{
+	// RFC 3548 examples
+	testpair{"\x14\xfb\x9c\x03\xd9\x7e", "FPucA9l+"},
+	testpair{"\x14\xfb\x9c\x03\xd9", "FPucA9k="},
+	testpair{"\x14\xfb\x9c\x03", "FPucAw=="},
+
+	// RFC 4648 examples
+	testpair{"", ""},
+	testpair{"f", "Zg=="},
+	testpair{"fo", "Zm8="},
+	testpair{"foo", "Zm9v"},
+	testpair{"foob", "Zm9vYg=="},
+	testpair{"fooba", "Zm9vYmE="},
+	testpair{"foobar", "Zm9vYmFy"},
+
+	// Wikipedia examples
+	testpair{"sure.", "c3VyZS4="},
+	testpair{"sure", "c3VyZQ=="},
+	testpair{"sur", "c3Vy"},
+	testpair{"su", "c3U="},
+	testpair{"leasure.", "bGVhc3VyZS4="},
+	testpair{"easure.", "ZWFzdXJlLg=="},
+	testpair{"asure.", "YXN1cmUu"},
+	testpair{"sure.", "c3VyZS4="},
+}
+
+var bigtest = testpair{
+	"Twas brillig, and the slithy toves",
+	"VHdhcyBicmlsbGlnLCBhbmQgdGhlIHNsaXRoeSB0b3Zlcw==",
+}
+
+func testEqual(t *testing.T, msg string, args ...) bool {
+	v := reflect.NewValue(args).(*reflect.StructValue);
+	v1 := v.Field(v.NumField() - 2);
+	v2 := v.Field(v.NumField() - 1);
+	if v1.Interface() != v2.Interface() {
+		t.Errorf(msg, args);
+		return false;
+	}
+	return true;
+}
+
+func TestEncode(t *testing.T) {
+	for _, p := range pairs {
+		buf := make([]byte, StdEncoding.EncodedLen(len(p.decoded)));
+		StdEncoding.Encode(strings.Bytes(p.decoded), buf);
+		testEqual(t, "Encode(%q) = %q, want %q", p.decoded, string(buf), p.encoded);
+	}
+}
+
+func TestEncoder(t *testing.T) {
+	for _, p := range pairs {
+		bb := &bytes.Buffer{};
+		encoder := NewEncoder(StdEncoding, bb);
+		encoder.Write(strings.Bytes(p.decoded));
+		encoder.Close();
+		testEqual(t, "Encode(%q) = %q, want %q", p.decoded, bb.String(), p.encoded);
+	}
+}
+
+func TestEncoderBuffering(t *testing.T) {
+	input := strings.Bytes(bigtest.decoded);
+	for bs := 1; bs <= 12; bs++ {
+		bb := &bytes.Buffer{};
+		encoder := NewEncoder(StdEncoding, 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, bigtest.decoded, bb.String(), bigtest.encoded);
+	}
+}
+
+func TestDecode(t *testing.T) {
+	for _, p := range pairs {
+		dbuf := make([]byte, StdEncoding.DecodedLen(len(p.encoded)));
+		count, end, err := StdEncoding.decode(strings.Bytes(p.encoded), dbuf);
+		testEqual(t, "Decode(%q) = error %v, want %v", p.encoded, err, os.Error(nil));
+		testEqual(t, "Decode(%q) = length %v, want %v", p.encoded, count, len(p.decoded));
+		if len(p.encoded) > 0 {
+			testEqual(t, "Decode(%q) = end %v, want %v", p.encoded, end, (p.encoded[len(p.encoded)-1] == '='));
+		}
+		testEqual(t, "Decode(%q) = %q, want %q", p.encoded, string(dbuf[0:count]), p.decoded);
+	}
+}
+
+func TestDecoder(t *testing.T) {
+	for _, p := range pairs {
+		decoder := NewDecoder(StdEncoding, bytes.NewBufferString(p.encoded));
+		dbuf := make([]byte, StdEncoding.DecodedLen(len(p.encoded)));
+		count, err := decoder.Read(dbuf);
+		if err != nil && err != os.EOF {
+			t.Fatal("Read failed", err);
+		}
+		testEqual(t, "Read from %q = length %v, want %v", p.encoded, count, len(p.decoded));
+		testEqual(t, "Decoding of %q = %q, want %q", p.encoded, string(dbuf[0:count]), p.decoded);
+		if err != os.EOF {
+			count, err = decoder.Read(dbuf);
+		}
+		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(StdEncoding, bytes.NewBufferString(bigtest.encoded));
+		buf := make([]byte, len(bigtest.decoded)+12);
+		var total int;
+		for total = 0; total < len(bigtest.decoded); {
+			n, err := decoder.Read(buf[total : total+bs]);
+			testEqual(t, "Read from %q at pos %d = %d, %v, want _, %v", bigtest.encoded, total, n, err, os.Error(nil));
+			total += n;
+		}
+		testEqual(t, "Decoding/%d of %q = %q, want %q", bs, bigtest.encoded, string(buf[0:total]), bigtest.decoded);
+	}
+}
+
+func TestDecodeCorrupt(t *testing.T) {
+	type corrupt struct {
+		e	string;
+		p	int;
+	}
+	examples := []corrupt{
+		corrupt{"!!!!", 0},
+		corrupt{"x===", 1},
+		corrupt{"AA=A", 2},
+		corrupt{"AAA=AAAA", 3},
+		corrupt{"AAAAA", 4},
+		corrupt{"AAAAAA", 4},
+	};
+
+	for _, e := range examples {
+		dbuf := make([]byte, StdEncoding.DecodedLen(len(e.e)));
+		_, err := StdEncoding.Decode(strings.Bytes(e.e), dbuf);
+		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 TestBig(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(StdEncoding, 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 := io.ReadAll(NewDecoder(StdEncoding, encoded));
+	if err != nil {
+		t.Fatalf("io.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);
+	}
+}