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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 utf8
import (
"bytes";
"fmt";
"io";
"testing";
"utf8";
)
type Utf8Map struct {
rune int;
str string;
}
var utf8map = []Utf8Map {
Utf8Map{ 0x0000, "\x00" },
Utf8Map{ 0x0001, "\x01" },
Utf8Map{ 0x007e, "\x7e" },
Utf8Map{ 0x007f, "\x7f" },
Utf8Map{ 0x0080, "\xc2\x80" },
Utf8Map{ 0x0081, "\xc2\x81" },
Utf8Map{ 0x00bf, "\xc2\xbf" },
Utf8Map{ 0x00c0, "\xc3\x80" },
Utf8Map{ 0x00c1, "\xc3\x81" },
Utf8Map{ 0x00c8, "\xc3\x88" },
Utf8Map{ 0x00d0, "\xc3\x90" },
Utf8Map{ 0x00e0, "\xc3\xa0" },
Utf8Map{ 0x00f0, "\xc3\xb0" },
Utf8Map{ 0x00f8, "\xc3\xb8" },
Utf8Map{ 0x00ff, "\xc3\xbf" },
Utf8Map{ 0x0100, "\xc4\x80" },
Utf8Map{ 0x07ff, "\xdf\xbf" },
Utf8Map{ 0x0800, "\xe0\xa0\x80" },
Utf8Map{ 0x0801, "\xe0\xa0\x81" },
Utf8Map{ 0xfffe, "\xef\xbf\xbe" },
Utf8Map{ 0xffff, "\xef\xbf\xbf" },
Utf8Map{ 0x10000, "\xf0\x90\x80\x80" },
Utf8Map{ 0x10001, "\xf0\x90\x80\x81" },
Utf8Map{ 0x10fffe, "\xf4\x8f\xbf\xbe" },
Utf8Map{ 0x10ffff, "\xf4\x8f\xbf\xbf" },
}
// io.StringBytes with one extra byte at end
func makeBytes(s string) []byte {
s += "\x00";
b := io.StringBytes(s);
return b[0:len(s)-1];
}
func TestFullRune(t *testing.T) {
for i := 0; i < len(utf8map); i++ {
m := utf8map[i];
b := makeBytes(m.str);
if !utf8.FullRune(b) {
t.Errorf("FullRune(%q) (rune %04x) = false, want true", b, m.rune);
}
s := m.str;
if !utf8.FullRuneInString(s) {
t.Errorf("FullRuneInString(%q) (rune %04x) = false, want true", s, m.rune);
}
b1 := b[0:len(b)-1];
if utf8.FullRune(b1) {
t.Errorf("FullRune(%q) = true, want false", b1);
}
s1 := string(b1);
if utf8.FullRuneInString(s1) {
t.Errorf("FullRune(%q) = true, want false", s1);
}
}
}
func TestEncodeRune(t *testing.T) {
for i := 0; i < len(utf8map); i++ {
m := utf8map[i];
b := makeBytes(m.str);
var buf [10]byte;
n := utf8.EncodeRune(m.rune, &buf);
b1 := buf[0:n];
if !bytes.Equal(b, b1) {
t.Errorf("EncodeRune(0x%04x) = %q want %q", m.rune, b1, b);
}
}
}
func TestDecodeRune(t *testing.T) {
for i := 0; i < len(utf8map); i++ {
m := utf8map[i];
b := makeBytes(m.str);
rune, size := utf8.DecodeRune(b);
if rune != m.rune || size != len(b) {
t.Errorf("DecodeRune(%q) = 0x%04x, %d want 0x%04x, %d", b, rune, size, m.rune, len(b));
}
s := m.str;
rune, size = utf8.DecodeRuneInString(s);
if rune != m.rune || size != len(b) {
t.Errorf("DecodeRune(%q) = 0x%04x, %d want 0x%04x, %d", s, rune, size, m.rune, len(b));
}
// there's an extra byte that bytes left behind - make sure trailing byte works
rune, size = utf8.DecodeRune(b[0:cap(b)]);
if rune != m.rune || size != len(b) {
t.Errorf("DecodeRune(%q) = 0x%04x, %d want 0x%04x, %d", b, rune, size, m.rune, len(b));
}
s = m.str+"\x00";
rune, size = utf8.DecodeRuneInString(s);
if rune != m.rune || size != len(b) {
t.Errorf("DecodeRuneInString(%q) = 0x%04x, %d want 0x%04x, %d", s, rune, size, m.rune, len(b));
}
// make sure missing bytes fail
wantsize := 1;
if wantsize >= len(b) {
wantsize = 0;
}
rune, size = utf8.DecodeRune(b[0:len(b)-1]);
if rune != RuneError || size != wantsize {
t.Errorf("DecodeRune(%q) = 0x%04x, %d want 0x%04x, %d", b[0:len(b)-1], rune, size, RuneError, wantsize);
}
s = m.str[0:len(m.str)-1];
rune, size = utf8.DecodeRuneInString(s);
if rune != RuneError || size != wantsize {
t.Errorf("DecodeRuneInString(%q) = 0x%04x, %d want 0x%04x, %d", s, rune, size, RuneError, wantsize);
}
// make sure bad sequences fail
if len(b) == 1 {
b[0] = 0x80;
} else {
b[len(b)-1] = 0x7F;
}
rune, size = utf8.DecodeRune(b);
if rune != RuneError || size != 1 {
t.Errorf("DecodeRune(%q) = 0x%04x, %d want 0x%04x, %d", b, rune, size, RuneError, 1);
}
s = string(b);
rune, size = utf8.DecodeRune(b);
if rune != RuneError || size != 1 {
t.Errorf("DecodeRuneInString(%q) = 0x%04x, %d want 0x%04x, %d", s, rune, size, RuneError, 1);
}
}
}
type RuneCountTest struct {
in string;
out int;
}
var runecounttests = []RuneCountTest {
RuneCountTest{ "abcd", 4 },
RuneCountTest{ "☺☻☹", 3 },
RuneCountTest{ "1,2,3,4", 7 },
RuneCountTest{ "\xe2\x00", 2 },
}
func TestRuneCount(t *testing.T) {
for i := 0; i < len(runecounttests); i++ {
tt := runecounttests[i];
if out := utf8.RuneCountInString(tt.in); out != tt.out {
t.Errorf("RuneCountInString(%q) = %d, want %d", tt.in, out, tt.out);
}
if out := utf8.RuneCount(makeBytes(tt.in)); out != tt.out {
t.Errorf("RuneCount(%q) = %d, want %d", tt.in, out, tt.out);
}
}
}
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