Golang程序
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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 unicode_test
import (
"flag"
"fmt"
"runtime"
"sort"
"testing"
. "unicode"
)
var upperTest = []rune{
0x41,
0xc0,
0xd8,
0x100,
0x139,
0x14a,
0x178,
0x181,
0x376,
0x3cf,
0x13bd,
0x1f2a,
0x2102,
0x2c00,
0x2c10,
0x2c20,
0xa650,
0xa722,
0xff3a,
0x10400,
0x1d400,
0x1d7ca,
}
var notupperTest = []rune{
0x40,
0x5b,
0x61,
0x185,
0x1b0,
0x377,
0x387,
0x2150,
0xab7d,
0xffff,
0x10000,
}
var letterTest = []rune{
0x41,
0x61,
0xaa,
0xba,
0xc8,
0xdb,
0xf9,
0x2ec,
0x535,
0x620,
0x6e6,
0x93d,
0xa15,
0xb99,
0xdc0,
0xedd,
0x1000,
0x1200,
0x1312,
0x1401,
0x1885,
0x2c00,
0xa800,
0xf900,
0xfa30,
0xffda,
0xffdc,
0x10000,
0x10300,
0x10400,
0x20000,
0x2f800,
0x2fa1d,
}
var notletterTest = []rune{
0x20,
0x35,
0x375,
0x619,
0x700,
0xfffe,
0x1ffff,
0x10ffff,
}
// Contains all the special cased Latin-1 chars.
var spaceTest = []rune{
0x09,
0x0a,
0x0b,
0x0c,
0x0d,
0x20,
0x85,
0xA0,
0x2000,
0x3000,
}
type caseT struct {
cas int
in, out rune
}
var caseTest = []caseT{
// errors
{-1, '\n', 0xFFFD},
{UpperCase, -1, -1},
{UpperCase, 1 << 30, 1 << 30},
// ASCII (special-cased so test carefully)
{UpperCase, '\n', '\n'},
{UpperCase, 'a', 'A'},
{UpperCase, 'A', 'A'},
{UpperCase, '7', '7'},
{LowerCase, '\n', '\n'},
{LowerCase, 'a', 'a'},
{LowerCase, 'A', 'a'},
{LowerCase, '7', '7'},
{TitleCase, '\n', '\n'},
{TitleCase, 'a', 'A'},
{TitleCase, 'A', 'A'},
{TitleCase, '7', '7'},
// Latin-1: easy to read the tests!
{UpperCase, 0x80, 0x80},
{UpperCase, 'Å', 'Å'},
{UpperCase, 'å', 'Å'},
{LowerCase, 0x80, 0x80},
{LowerCase, 'Å', 'å'},
{LowerCase, 'å', 'å'},
{TitleCase, 0x80, 0x80},
{TitleCase, 'Å', 'Å'},
{TitleCase, 'å', 'Å'},
// 0131;LATIN SMALL LETTER DOTLESS I;Ll;0;L;;;;;N;;;0049;;0049
{UpperCase, 0x0131, 'I'},
{LowerCase, 0x0131, 0x0131},
{TitleCase, 0x0131, 'I'},
// 0133;LATIN SMALL LIGATURE IJ;Ll;0;L;<compat> 0069 006A;;;;N;LATIN SMALL LETTER I J;;0132;;0132
{UpperCase, 0x0133, 0x0132},
{LowerCase, 0x0133, 0x0133},
{TitleCase, 0x0133, 0x0132},
// 212A;KELVIN SIGN;Lu;0;L;004B;;;;N;DEGREES KELVIN;;;006B;
{UpperCase, 0x212A, 0x212A},
{LowerCase, 0x212A, 'k'},
{TitleCase, 0x212A, 0x212A},
// From an UpperLower sequence
// A640;CYRILLIC CAPITAL LETTER ZEMLYA;Lu;0;L;;;;;N;;;;A641;
{UpperCase, 0xA640, 0xA640},
{LowerCase, 0xA640, 0xA641},
{TitleCase, 0xA640, 0xA640},
// A641;CYRILLIC SMALL LETTER ZEMLYA;Ll;0;L;;;;;N;;;A640;;A640
{UpperCase, 0xA641, 0xA640},
{LowerCase, 0xA641, 0xA641},
{TitleCase, 0xA641, 0xA640},
// A64E;CYRILLIC CAPITAL LETTER NEUTRAL YER;Lu;0;L;;;;;N;;;;A64F;
{UpperCase, 0xA64E, 0xA64E},
{LowerCase, 0xA64E, 0xA64F},
{TitleCase, 0xA64E, 0xA64E},
// A65F;CYRILLIC SMALL LETTER YN;Ll;0;L;;;;;N;;;A65E;;A65E
{UpperCase, 0xA65F, 0xA65E},
{LowerCase, 0xA65F, 0xA65F},
{TitleCase, 0xA65F, 0xA65E},
// From another UpperLower sequence
// 0139;LATIN CAPITAL LETTER L WITH ACUTE;Lu;0;L;004C 0301;;;;N;LATIN CAPITAL LETTER L ACUTE;;;013A;
{UpperCase, 0x0139, 0x0139},
{LowerCase, 0x0139, 0x013A},
{TitleCase, 0x0139, 0x0139},
// 013F;LATIN CAPITAL LETTER L WITH MIDDLE DOT;Lu;0;L;<compat> 004C 00B7;;;;N;;;;0140;
{UpperCase, 0x013f, 0x013f},
{LowerCase, 0x013f, 0x0140},
{TitleCase, 0x013f, 0x013f},
// 0148;LATIN SMALL LETTER N WITH CARON;Ll;0;L;006E 030C;;;;N;LATIN SMALL LETTER N HACEK;;0147;;0147
{UpperCase, 0x0148, 0x0147},
{LowerCase, 0x0148, 0x0148},
{TitleCase, 0x0148, 0x0147},
// Lowercase lower than uppercase.
// AB78;CHEROKEE SMALL LETTER GE;Ll;0;L;;;;;N;;;13A8;;13A8
{UpperCase, 0xab78, 0x13a8},
{LowerCase, 0xab78, 0xab78},
{TitleCase, 0xab78, 0x13a8},
{UpperCase, 0x13a8, 0x13a8},
{LowerCase, 0x13a8, 0xab78},
{TitleCase, 0x13a8, 0x13a8},
// Last block in the 5.1.0 table
// 10400;DESERET CAPITAL LETTER LONG I;Lu;0;L;;;;;N;;;;10428;
{UpperCase, 0x10400, 0x10400},
{LowerCase, 0x10400, 0x10428},
{TitleCase, 0x10400, 0x10400},
// 10427;DESERET CAPITAL LETTER EW;Lu;0;L;;;;;N;;;;1044F;
{UpperCase, 0x10427, 0x10427},
{LowerCase, 0x10427, 0x1044F},
{TitleCase, 0x10427, 0x10427},
// 10428;DESERET SMALL LETTER LONG I;Ll;0;L;;;;;N;;;10400;;10400
{UpperCase, 0x10428, 0x10400},
{LowerCase, 0x10428, 0x10428},
{TitleCase, 0x10428, 0x10400},
// 1044F;DESERET SMALL LETTER EW;Ll;0;L;;;;;N;;;10427;;10427
{UpperCase, 0x1044F, 0x10427},
{LowerCase, 0x1044F, 0x1044F},
{TitleCase, 0x1044F, 0x10427},
// First one not in the 5.1.0 table
// 10450;SHAVIAN LETTER PEEP;Lo;0;L;;;;;N;;;;;
{UpperCase, 0x10450, 0x10450},
{LowerCase, 0x10450, 0x10450},
{TitleCase, 0x10450, 0x10450},
// Non-letters with case.
{LowerCase, 0x2161, 0x2171},
{UpperCase, 0x0345, 0x0399},
}
func TestIsLetter(t *testing.T) {
for _, r := range upperTest {
if !IsLetter(r) {
t.Errorf("IsLetter(U+%04X) = false, want true", r)
}
}
for _, r := range letterTest {
if !IsLetter(r) {
t.Errorf("IsLetter(U+%04X) = false, want true", r)
}
}
for _, r := range notletterTest {
if IsLetter(r) {
t.Errorf("IsLetter(U+%04X) = true, want false", r)
}
}
}
func TestIsUpper(t *testing.T) {
for _, r := range upperTest {
if !IsUpper(r) {
t.Errorf("IsUpper(U+%04X) = false, want true", r)
}
}
for _, r := range notupperTest {
if IsUpper(r) {
t.Errorf("IsUpper(U+%04X) = true, want false", r)
}
}
for _, r := range notletterTest {
if IsUpper(r) {
t.Errorf("IsUpper(U+%04X) = true, want false", r)
}
}
}
func caseString(c int) string {
switch c {
case UpperCase:
return "UpperCase"
case LowerCase:
return "LowerCase"
case TitleCase:
return "TitleCase"
}
return "ErrorCase"
}
func TestTo(t *testing.T) {
for _, c := range caseTest {
r := To(c.cas, c.in)
if c.out != r {
t.Errorf("To(U+%04X, %s) = U+%04X want U+%04X", c.in, caseString(c.cas), r, c.out)
}
}
}
func TestToUpperCase(t *testing.T) {
for _, c := range caseTest {
if c.cas != UpperCase {
continue
}
r := ToUpper(c.in)
if c.out != r {
t.Errorf("ToUpper(U+%04X) = U+%04X want U+%04X", c.in, r, c.out)
}
}
}
func TestToLowerCase(t *testing.T) {
for _, c := range caseTest {
if c.cas != LowerCase {
continue
}
r := ToLower(c.in)
if c.out != r {
t.Errorf("ToLower(U+%04X) = U+%04X want U+%04X", c.in, r, c.out)
}
}
}
func TestToTitleCase(t *testing.T) {
for _, c := range caseTest {
if c.cas != TitleCase {
continue
}
r := ToTitle(c.in)
if c.out != r {
t.Errorf("ToTitle(U+%04X) = U+%04X want U+%04X", c.in, r, c.out)
}
}
}
func TestIsSpace(t *testing.T) {
for _, c := range spaceTest {
if !IsSpace(c) {
t.Errorf("IsSpace(U+%04X) = false; want true", c)
}
}
for _, c := range letterTest {
if IsSpace(c) {
t.Errorf("IsSpace(U+%04X) = true; want false", c)
}
}
}
// Check that the optimizations for IsLetter etc. agree with the tables.
// We only need to check the Latin-1 range.
func TestLetterOptimizations(t *testing.T) {
for i := rune(0); i <= MaxLatin1; i++ {
if Is(Letter, i) != IsLetter(i) {
t.Errorf("IsLetter(U+%04X) disagrees with Is(Letter)", i)
}
if Is(Upper, i) != IsUpper(i) {
t.Errorf("IsUpper(U+%04X) disagrees with Is(Upper)", i)
}
if Is(Lower, i) != IsLower(i) {
t.Errorf("IsLower(U+%04X) disagrees with Is(Lower)", i)
}
if Is(Title, i) != IsTitle(i) {
t.Errorf("IsTitle(U+%04X) disagrees with Is(Title)", i)
}
if Is(White_Space, i) != IsSpace(i) {
t.Errorf("IsSpace(U+%04X) disagrees with Is(White_Space)", i)
}
if To(UpperCase, i) != ToUpper(i) {
t.Errorf("ToUpper(U+%04X) disagrees with To(Upper)", i)
}
if To(LowerCase, i) != ToLower(i) {
t.Errorf("ToLower(U+%04X) disagrees with To(Lower)", i)
}
if To(TitleCase, i) != ToTitle(i) {
t.Errorf("ToTitle(U+%04X) disagrees with To(Title)", i)
}
}
}
func TestTurkishCase(t *testing.T) {
lower := []rune("abcçdefgğhıijklmnoöprsştuüvyz")
upper := []rune("ABCÇDEFGĞHIİJKLMNOÖPRSŞTUÜVYZ")
for i, l := range lower {
u := upper[i]
if TurkishCase.ToLower(l) != l {
t.Errorf("lower(U+%04X) is U+%04X not U+%04X", l, TurkishCase.ToLower(l), l)
}
if TurkishCase.ToUpper(u) != u {
t.Errorf("upper(U+%04X) is U+%04X not U+%04X", u, TurkishCase.ToUpper(u), u)
}
if TurkishCase.ToUpper(l) != u {
t.Errorf("upper(U+%04X) is U+%04X not U+%04X", l, TurkishCase.ToUpper(l), u)
}
if TurkishCase.ToLower(u) != l {
t.Errorf("lower(U+%04X) is U+%04X not U+%04X", u, TurkishCase.ToLower(l), l)
}
if TurkishCase.ToTitle(u) != u {
t.Errorf("title(U+%04X) is U+%04X not U+%04X", u, TurkishCase.ToTitle(u), u)
}
if TurkishCase.ToTitle(l) != u {
t.Errorf("title(U+%04X) is U+%04X not U+%04X", l, TurkishCase.ToTitle(l), u)
}
}
}
var simpleFoldTests = []string{
// SimpleFold(x) returns the next equivalent rune > x or wraps
// around to smaller values.
// Easy cases.
"Aa",
"δΔ",
// ASCII special cases.
"KkK",
"Ssſ",
// Non-ASCII special cases.
"ρϱΡ",
"ͅΙιι",
// Extra special cases: has lower/upper but no case fold.
"İ",
"ı",
// Upper comes before lower (Cherokee).
"\u13b0\uab80",
}
func TestSimpleFold(t *testing.T) {
for _, tt := range simpleFoldTests {
cycle := []rune(tt)
r := cycle[len(cycle)-1]
for _, out := range cycle {
if r := SimpleFold(r); r != out {
t.Errorf("SimpleFold(%#U) = %#U, want %#U", r, r, out)
}
r = out
}
}
}
// Running 'go test -calibrate' runs the calibration to find a plausible
// cutoff point for linear search of a range list vs. binary search.
// We create a fake table and then time how long it takes to do a
// sequence of searches within that table, for all possible inputs
// relative to the ranges (something before all, in each, between each, after all).
// This assumes that all possible runes are equally likely.
// In practice most runes are ASCII so this is a conservative estimate
// of an effective cutoff value. In practice we could probably set it higher
// than what this function recommends.
var calibrate = flag.Bool("calibrate", false, "compute crossover for linear vs. binary search")
func TestCalibrate(t *testing.T) {
if !*calibrate {
return
}
if runtime.GOARCH == "amd64" {
fmt.Printf("warning: running calibration on %s\n", runtime.GOARCH)
}
// Find the point where binary search wins by more than 10%.
// The 10% bias gives linear search an edge when they're close,
// because on predominantly ASCII inputs linear search is even
// better than our benchmarks measure.
n := sort.Search(64, func(n int) bool {
tab := fakeTable(n)
blinear := func(b *testing.B) {
tab := tab
max := n*5 + 20
for i := 0; i < b.N; i++ {
for j := 0; j <= max; j++ {
linear(tab, uint16(j))
}
}
}
bbinary := func(b *testing.B) {
tab := tab
max := n*5 + 20
for i := 0; i < b.N; i++ {
for j := 0; j <= max; j++ {
binary(tab, uint16(j))
}
}
}
bmlinear := testing.Benchmark(blinear)
bmbinary := testing.Benchmark(bbinary)
fmt.Printf("n=%d: linear=%d binary=%d\n", n, bmlinear.NsPerOp(), bmbinary.NsPerOp())
return bmlinear.NsPerOp()*100 > bmbinary.NsPerOp()*110
})
fmt.Printf("calibration: linear cutoff = %d\n", n)
}
func fakeTable(n int) []Range16 {
var r16 []Range16
for i := 0; i < n; i++ {
r16 = append(r16, Range16{uint16(i*5 + 10), uint16(i*5 + 12), 1})
}
return r16
}
func linear(ranges []Range16, r uint16) bool {
for i := range ranges {
range_ := &ranges[i]
if r < range_.Lo {
return false
}
if r <= range_.Hi {
return (r-range_.Lo)%range_.Stride == 0
}
}
return false
}
func binary(ranges []Range16, r uint16) bool {
// binary search over ranges
lo := 0
hi := len(ranges)
for lo < hi {
m := lo + (hi-lo)/2
range_ := &ranges[m]
if range_.Lo <= r && r <= range_.Hi {
return (r-range_.Lo)%range_.Stride == 0
}
if r < range_.Lo {
hi = m
} else {
lo = m + 1
}
}
return false
}
func TestLatinOffset(t *testing.T) {
var maps = []map[string]*RangeTable{
Categories,
FoldCategory,
FoldScript,
Properties,
Scripts,
}
for _, m := range maps {
for name, tab := range m {
i := 0
for i < len(tab.R16) && tab.R16[i].Hi <= MaxLatin1 {
i++
}
if tab.LatinOffset != i {
t.Errorf("%s: LatinOffset=%d, want %d", name, tab.LatinOffset, i)
}
}
}
}