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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_test
import (
"bytes"
"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"},
Utf8Map{0xFFFD, "\xef\xbf\xbd"},
}
// strings.Bytes with one extra byte at end
func makeBytes(s string) []byte {
s += "\x00"
b := []byte(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 !FullRune(b) {
t.Errorf("FullRune(%q) (rune %04x) = false, want true", b, m.rune)
}
s := m.str
if !FullRuneInString(s) {
t.Errorf("FullRuneInString(%q) (rune %04x) = false, want true", s, m.rune)
}
b1 := b[0 : len(b)-1]
if FullRune(b1) {
t.Errorf("FullRune(%q) = true, want false", b1)
}
s1 := string(b1)
if 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 := EncodeRune(m.rune, buf[0:])
b1 := buf[0:n]
if !bytes.Equal(b, b1) {
t.Errorf("EncodeRune(%#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 := DecodeRune(b)
if rune != m.rune || size != len(b) {
t.Errorf("DecodeRune(%q) = %#04x, %d want %#04x, %d", b, rune, size, m.rune, len(b))
}
s := m.str
rune, size = DecodeRuneInString(s)
if rune != m.rune || size != len(b) {
t.Errorf("DecodeRune(%q) = %#04x, %d want %#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 = DecodeRune(b[0:cap(b)])
if rune != m.rune || size != len(b) {
t.Errorf("DecodeRune(%q) = %#04x, %d want %#04x, %d", b, rune, size, m.rune, len(b))
}
s = m.str + "\x00"
rune, size = DecodeRuneInString(s)
if rune != m.rune || size != len(b) {
t.Errorf("DecodeRuneInString(%q) = %#04x, %d want %#04x, %d", s, rune, size, m.rune, len(b))
}
// make sure missing bytes fail
wantsize := 1
if wantsize >= len(b) {
wantsize = 0
}
rune, size = DecodeRune(b[0 : len(b)-1])
if rune != RuneError || size != wantsize {
t.Errorf("DecodeRune(%q) = %#04x, %d want %#04x, %d", b[0:len(b)-1], rune, size, RuneError, wantsize)
}
s = m.str[0 : len(m.str)-1]
rune, size = DecodeRuneInString(s)
if rune != RuneError || size != wantsize {
t.Errorf("DecodeRuneInString(%q) = %#04x, %d want %#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 = DecodeRune(b)
if rune != RuneError || size != 1 {
t.Errorf("DecodeRune(%q) = %#04x, %d want %#04x, %d", b, rune, size, RuneError, 1)
}
s = string(b)
rune, size = DecodeRune(b)
if rune != RuneError || size != 1 {
t.Errorf("DecodeRuneInString(%q) = %#04x, %d want %#04x, %d", s, rune, size, RuneError, 1)
}
}
}
// Check that negative runes encode as U+FFFD.
func TestNegativeRune(t *testing.T) {
errorbuf := make([]byte, UTFMax)
errorbuf = errorbuf[0:EncodeRune(RuneError, errorbuf)]
buf := make([]byte, UTFMax)
buf = buf[0:EncodeRune(-1, buf)]
if !bytes.Equal(buf, errorbuf) {
t.Errorf("incorrect encoding [% x] for -1; expected [% x]", buf, errorbuf)
}
}
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 := RuneCountInString(tt.in); out != tt.out {
t.Errorf("RuneCountInString(%q) = %d, want %d", tt.in, out, tt.out)
}
if out := RuneCount(makeBytes(tt.in)); out != tt.out {
t.Errorf("RuneCount(%q) = %d, want %d", tt.in, out, tt.out)
}
}
}
func BenchmarkRuneCountTenASCIIChars(b *testing.B) {
for i := 0; i < b.N; i++ {
RuneCountInString("0123456789")
}
}
func BenchmarkRuneCountTenJapaneseChars(b *testing.B) {
for i := 0; i < b.N; i++ {
RuneCountInString("日本語日本語日本語日")
}
}
func BenchmarkEncodeASCIIRune(b *testing.B) {
buf := make([]byte, UTFMax)
for i := 0; i < b.N; i++ {
EncodeRune('a', buf)
}
}
func BenchmarkEncodeJapaneseRune(b *testing.B) {
buf := make([]byte, UTFMax)
for i := 0; i < b.N; i++ {
EncodeRune('本', buf)
}
}
func BenchmarkDecodeASCIIRune(b *testing.B) {
a := []byte{'a'}
for i := 0; i < b.N; i++ {
DecodeRune(a)
}
}
func BenchmarkDecodeJapaneseRune(b *testing.B) {
nihon := []byte("本")
for i := 0; i < b.N; i++ {
DecodeRune(nihon)
}
}
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