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// Copyright 2013 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 language
import (
"bytes"
"flag"
"fmt"
"os"
"path"
"path/filepath"
"strings"
"testing"
"unicode/utf8"
"golang.org/x/text/internal/testtext"
"golang.org/x/text/internal/ucd"
)
var verbose = flag.Bool("verbose", false, "set to true to print the internal tables of matchers")
func TestCompliance(t *testing.T) {
filepath.Walk("testdata", func(file string, info os.FileInfo, err error) error {
if info.IsDir() {
return nil
}
r, err := os.Open(file)
if err != nil {
t.Fatal(err)
}
ucd.Parse(r, func(p *ucd.Parser) {
name := strings.ReplaceAll(path.Join(p.String(0), p.String(1)), " ", "")
if skip[name] {
return
}
t.Run(info.Name()+"/"+short(name), func(t *testing.T) {
supported := makeTagList(p.String(0))
desired := makeTagList(p.String(1))
gotCombined, index, conf := NewMatcher(supported).Match(desired...)
gotMatch := supported[index]
wantMatch := Raw.Make(p.String(2)) // wantMatch may be null
if gotMatch != wantMatch {
t.Fatalf("match: got %q; want %q (%v)", gotMatch, wantMatch, conf)
}
if tag := strings.TrimSpace(p.String(3)); tag != "" {
wantCombined := Raw.MustParse(tag)
if err == nil && gotCombined != wantCombined {
t.Errorf("combined: got %q; want %q (%v)", gotCombined, wantCombined, conf)
}
}
})
})
return nil
})
}
func short(s string) string {
if len(s) <= 50 {
return s
}
var i int
for i = 1; i < utf8.UTFMax && !utf8.RuneStart(s[50-i]); i++ {
}
return s[:50-i] + "…"
}
var skip = map[string]bool{
// TODO: bugs
// Honor the wildcard match. This may only be useful to select non-exact
// stuff.
"mul,af/nl": true, // match: got "af"; want "mul"
// TODO: include other extensions.
// combined: got "en-GB-u-ca-buddhist-nu-arab"; want "en-GB-fonipa-t-m0-iso-i0-pinyin-u-ca-buddhist-nu-arab"
"und,en-GB-u-sd-gbsct/en-fonipa-u-nu-Arab-ca-buddhist-t-m0-iso-i0-pinyin": true,
// Inconsistencies with Mark Davis' implementation where it is not clear
// which is better.
// Inconsistencies in combined. I think the Go approach is more appropriate.
// We could use -u-rg- as alternative.
"und,fr/fr-BE-fonipa": true, // combined: got "fr"; want "fr-BE-fonipa"
"und,fr-CA/fr-BE-fonipa": true, // combined: got "fr-CA"; want "fr-BE-fonipa"
"und,fr-fonupa/fr-BE-fonipa": true, // combined: got "fr-fonupa"; want "fr-BE-fonipa"
"und,no/nn-BE-fonipa": true, // combined: got "no"; want "no-BE-fonipa"
"50,und,fr-CA-fonupa/fr-BE-fonipa": true, // combined: got "fr-CA-fonupa"; want "fr-BE-fonipa"
// The initial number is a threshold. As we don't use scoring, we will not
// implement this.
"50,und,fr-Cyrl-CA-fonupa/fr-BE-fonipa": true,
// match: got "und"; want "fr-Cyrl-CA-fonupa"
// combined: got "und"; want "fr-Cyrl-BE-fonipa"
// Other interesting cases to test:
// - Should same language or same script have the preference if there is
// usually no understanding of the other script?
// - More specific region in desired may replace enclosing supported.
}
func makeTagList(s string) (tags []Tag) {
for _, s := range strings.Split(s, ",") {
tags = append(tags, mk(strings.TrimSpace(s)))
}
return tags
}
func TestMatchStrings(t *testing.T) {
testCases := []struct {
supported string
desired string // strings separated by |
tag string
index int
}{{
supported: "en",
desired: "",
tag: "en",
index: 0,
}, {
supported: "en",
desired: "nl",
tag: "en",
index: 0,
}, {
supported: "en,nl",
desired: "nl",
tag: "nl",
index: 1,
}, {
supported: "en,nl",
desired: "nl|en",
tag: "nl",
index: 1,
}, {
supported: "en-GB,nl",
desired: "en ; q=0.1,nl",
tag: "nl",
index: 1,
}, {
supported: "en-GB,nl",
desired: "en;q=0.005 | dk; q=0.1,nl ",
tag: "en-GB",
index: 0,
}, {
// do not match faulty tags with und
supported: "en,und",
desired: "|en",
tag: "en",
index: 0,
}}
for _, tc := range testCases {
t.Run(path.Join(tc.supported, tc.desired), func(t *testing.T) {
m := NewMatcher(makeTagList(tc.supported))
tag, index := MatchStrings(m, strings.Split(tc.desired, "|")...)
if tag.String() != tc.tag || index != tc.index {
t.Errorf("got %v, %d; want %v, %d", tag, index, tc.tag, tc.index)
}
})
}
}
func TestRegionGroups(t *testing.T) {
testCases := []struct {
a, b string
distance uint8
}{
{"zh-TW", "zh-HK", 5},
{"zh-MO", "zh-HK", 4},
{"es-ES", "es-AR", 5},
{"es-ES", "es", 4},
{"es-419", "es-MX", 4},
{"es-AR", "es-MX", 4},
{"es-ES", "es-MX", 5},
{"es-PT", "es-MX", 5},
}
for _, tc := range testCases {
a := MustParse(tc.a)
aScript, _ := a.Script()
b := MustParse(tc.b)
bScript, _ := b.Script()
if aScript != bScript {
t.Errorf("scripts differ: %q vs %q", aScript, bScript)
continue
}
d, _ := regionGroupDist(a.region(), b.region(), aScript.scriptID, a.lang())
if d != tc.distance {
t.Errorf("got %q; want %q", d, tc.distance)
}
}
}
func TestIsParadigmLocale(t *testing.T) {
testCases := map[string]bool{
"en-US": true,
"en-GB": true,
"en-VI": false,
"es-GB": false,
"es-ES": true,
"es-419": true,
}
for str, want := range testCases {
tt := Make(str)
tag := tt.tag()
got := isParadigmLocale(tag.LangID, tag.RegionID)
if got != want {
t.Errorf("isPL(%q) = %v; want %v", str, got, want)
}
}
}
// Implementation of String methods for various types for debugging purposes.
func (m *matcher) String() string {
w := &bytes.Buffer{}
fmt.Fprintln(w, "Default:", m.default_)
for tag, h := range m.index {
fmt.Fprintf(w, " %s: %v\n", tag, h)
}
return w.String()
}
func (h *matchHeader) String() string {
w := &bytes.Buffer{}
fmt.Fprint(w, "haveTag: ")
for _, h := range h.haveTags {
fmt.Fprintf(w, "%v, ", h)
}
return w.String()
}
func (t haveTag) String() string {
return fmt.Sprintf("%v:%d:%v:%v-%v|%v", t.tag, t.index, t.conf, t.maxRegion, t.maxScript, t.altScript)
}
func TestIssue43834(t *testing.T) {
matcher := NewMatcher([]Tag{English})
// ZZ is the largest region code and should not cause overflow.
desired, _, err := ParseAcceptLanguage("en-ZZ")
if err != nil {
t.Error(err)
}
_, i, _ := matcher.Match(desired...)
if i != 0 {
t.Errorf("got %v; want 0", i)
}
}
func TestBestMatchAlloc(t *testing.T) {
m := NewMatcher(makeTagList("en sr nl"))
// Go allocates when creating a list of tags from a single tag!
list := []Tag{English}
avg := testtext.AllocsPerRun(100, func() {
m.Match(list...)
})
if avg > 0 {
t.Errorf("got %f; want 0", avg)
}
}
var benchHave = []Tag{
mk("en"),
mk("en-GB"),
mk("za"),
mk("zh-Hant"),
mk("zh-Hans-CN"),
mk("zh"),
mk("zh-HK"),
mk("ar-MK"),
mk("en-CA"),
mk("fr-CA"),
mk("fr-US"),
mk("fr-CH"),
mk("fr"),
mk("lt"),
mk("lv"),
mk("iw"),
mk("iw-NL"),
mk("he"),
mk("he-IT"),
mk("tlh"),
mk("ja"),
mk("ja-Jpan"),
mk("ja-Jpan-JP"),
mk("de"),
mk("de-CH"),
mk("de-AT"),
mk("de-DE"),
mk("sr"),
mk("sr-Latn"),
mk("sr-Cyrl"),
mk("sr-ME"),
}
var benchWant = [][]Tag{
[]Tag{
mk("en"),
},
[]Tag{
mk("en-AU"),
mk("de-HK"),
mk("nl"),
mk("fy"),
mk("lv"),
},
[]Tag{
mk("en-AU"),
mk("de-HK"),
mk("nl"),
mk("fy"),
},
[]Tag{
mk("ja-Hant"),
mk("da-HK"),
mk("nl"),
mk("zh-TW"),
},
[]Tag{
mk("ja-Hant"),
mk("da-HK"),
mk("nl"),
mk("hr"),
},
}
func BenchmarkMatch(b *testing.B) {
m := newMatcher(benchHave, nil)
for i := 0; i < b.N; i++ {
for _, want := range benchWant {
m.getBest(want...)
}
}
}
func BenchmarkMatchExact(b *testing.B) {
want := mk("en")
m := newMatcher(benchHave, nil)
for i := 0; i < b.N; i++ {
m.getBest(want)
}
}
func BenchmarkMatchAltLanguagePresent(b *testing.B) {
want := mk("hr")
m := newMatcher(benchHave, nil)
for i := 0; i < b.N; i++ {
m.getBest(want)
}
}
func BenchmarkMatchAltLanguageNotPresent(b *testing.B) {
want := mk("nn")
m := newMatcher(benchHave, nil)
for i := 0; i < b.N; i++ {
m.getBest(want)
}
}
func BenchmarkMatchAltScriptPresent(b *testing.B) {
want := mk("zh-Hant-CN")
m := newMatcher(benchHave, nil)
for i := 0; i < b.N; i++ {
m.getBest(want)
}
}
func BenchmarkMatchAltScriptNotPresent(b *testing.B) {
want := mk("fr-Cyrl")
m := newMatcher(benchHave, nil)
for i := 0; i < b.N; i++ {
m.getBest(want)
}
}
func BenchmarkMatchLimitedExact(b *testing.B) {
want := []Tag{mk("he-NL"), mk("iw-NL")}
m := newMatcher(benchHave, nil)
for i := 0; i < b.N; i++ {
m.getBest(want...)
}
}