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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 (
"strings"
"testing"
"golang.org/x/text/internal/language"
)
// equalTags compares language, script and region subtags only.
func (t Tag) equalTags(a Tag) bool {
return t.lang() == a.lang() &&
t.script() == a.script() &&
t.region() == a.region()
}
var errSyntax = language.ErrSyntax
type parseTest struct {
i int // the index of this test
in string
lang, script, region string
variants, ext string
extList []string // only used when more than one extension is present
invalid bool
rewrite bool // special rewrite not handled by parseTag
changed bool // string needed to be reformatted
}
func parseTests() []parseTest {
tests := []parseTest{
{in: "root", lang: "und"},
{in: "und", lang: "und"},
{in: "en", lang: "en"},
{in: "en-US-u-va-posix", lang: "en", region: "US", ext: "u-va-posix"},
{in: "ca-ES-valencia", lang: "ca", region: "ES", variants: "valencia"},
{in: "en-US-u-rg-gbzzzz", lang: "en", region: "US", ext: "u-rg-gbzzzz"},
{in: "xy", lang: "und", invalid: true},
{in: "en-ZY", lang: "en", invalid: true},
{in: "gsw", lang: "gsw"},
{in: "sr_Latn", lang: "sr", script: "Latn"},
{in: "af-Arab", lang: "af", script: "Arab"},
{in: "nl-BE", lang: "nl", region: "BE"},
{in: "es-419", lang: "es", region: "419"},
{in: "und-001", lang: "und", region: "001"},
{in: "de-latn-be", lang: "de", script: "Latn", region: "BE"},
// Variants
{in: "de-1901", lang: "de", variants: "1901"},
// Accept with unsuppressed script.
{in: "de-Latn-1901", lang: "de", script: "Latn", variants: "1901"},
// Specialized.
{in: "sl-rozaj", lang: "sl", variants: "rozaj"},
{in: "sl-rozaj-lipaw", lang: "sl", variants: "rozaj-lipaw"},
{in: "sl-rozaj-biske", lang: "sl", variants: "rozaj-biske"},
{in: "sl-rozaj-biske-1994", lang: "sl", variants: "rozaj-biske-1994"},
{in: "sl-rozaj-1994", lang: "sl", variants: "rozaj-1994"},
// Maximum number of variants while adhering to prefix rules.
{in: "sl-rozaj-biske-1994-alalc97-fonipa-fonupa-fonxsamp", lang: "sl", variants: "rozaj-biske-1994-alalc97-fonipa-fonupa-fonxsamp"},
// Sorting.
{in: "sl-1994-biske-rozaj", lang: "sl", variants: "rozaj-biske-1994", changed: true},
{in: "sl-rozaj-biske-1994-alalc97-fonupa-fonipa-fonxsamp", lang: "sl", variants: "rozaj-biske-1994-alalc97-fonipa-fonupa-fonxsamp", changed: true},
{in: "nl-fonxsamp-alalc97-fonipa-fonupa", lang: "nl", variants: "alalc97-fonipa-fonupa-fonxsamp", changed: true},
// Duplicates variants are removed, but not an error.
{in: "nl-fonupa-fonupa", lang: "nl", variants: "fonupa"},
// Variants that do not have correct prefixes. We still accept these.
{in: "de-Cyrl-1901", lang: "de", script: "Cyrl", variants: "1901"},
{in: "sl-rozaj-lipaw-1994", lang: "sl", variants: "rozaj-lipaw-1994"},
{in: "sl-1994-biske-rozaj-1994-biske-rozaj", lang: "sl", variants: "rozaj-biske-1994", changed: true},
{in: "de-Cyrl-1901", lang: "de", script: "Cyrl", variants: "1901"},
// Invalid variant.
{in: "de-1902", lang: "de", variants: "", invalid: true},
{in: "EN_CYRL", lang: "en", script: "Cyrl"},
// private use and extensions
{in: "x-a-b-c-d", ext: "x-a-b-c-d"},
{in: "x_A.-B-C_D", ext: "x-b-c-d", invalid: true, changed: true},
{in: "x-aa-bbbb-cccccccc-d", ext: "x-aa-bbbb-cccccccc-d"},
{in: "en-c_cc-b-bbb-a-aaa", lang: "en", changed: true, extList: []string{"a-aaa", "b-bbb", "c-cc"}},
{in: "en-x_cc-b-bbb-a-aaa", lang: "en", ext: "x-cc-b-bbb-a-aaa", changed: true},
{in: "en-c_cc-b-bbb-a-aaa-x-x", lang: "en", changed: true, extList: []string{"a-aaa", "b-bbb", "c-cc", "x-x"}},
{in: "en-v-c", lang: "en", ext: "", invalid: true},
{in: "en-v-abcdefghi", lang: "en", ext: "", invalid: true},
{in: "en-v-abc-x", lang: "en", ext: "v-abc", invalid: true},
{in: "en-v-abc-x-", lang: "en", ext: "v-abc", invalid: true},
{in: "en-v-abc-w-x-xx", lang: "en", extList: []string{"v-abc", "x-xx"}, invalid: true, changed: true},
{in: "en-v-abc-w-y-yx", lang: "en", extList: []string{"v-abc", "y-yx"}, invalid: true, changed: true},
{in: "en-v-c-abc", lang: "en", ext: "c-abc", invalid: true, changed: true},
{in: "en-v-w-abc", lang: "en", ext: "w-abc", invalid: true, changed: true},
{in: "en-v-x-abc", lang: "en", ext: "x-abc", invalid: true, changed: true},
{in: "en-v-x-a", lang: "en", ext: "x-a", invalid: true, changed: true},
{in: "en-9-aa-0-aa-z-bb-x-a", lang: "en", extList: []string{"0-aa", "9-aa", "z-bb", "x-a"}, changed: true},
{in: "en-u-c", lang: "en", ext: "", invalid: true},
{in: "en-u-co-phonebk", lang: "en", ext: "u-co-phonebk"},
{in: "en-u-co-phonebk-ca", lang: "en", ext: "u-ca-co-phonebk", invalid: true},
{in: "en-u-nu-arabic-co-phonebk-ca", lang: "en", ext: "u-ca-co-phonebk-nu-arabic", invalid: true, changed: true},
{in: "en-u-nu-arabic-co-phonebk-ca-x", lang: "en", ext: "u-ca-co-phonebk-nu-arabic", invalid: true, changed: true},
{in: "en-u-nu-arabic-co-phonebk-ca-s", lang: "en", ext: "u-ca-co-phonebk-nu-arabic", invalid: true, changed: true},
{in: "en-u-nu-arabic-co-phonebk-ca-a12345678", lang: "en", ext: "u-ca-co-phonebk-nu-arabic", invalid: true, changed: true},
{in: "en-u-co-phonebook", lang: "en", ext: "u-co", invalid: true},
{in: "en-u-co-phonebook-cu-xau", lang: "en", ext: "u-co-cu-xau", invalid: true, changed: true},
{in: "en-Cyrl-u-co-phonebk", lang: "en", script: "Cyrl", ext: "u-co-phonebk"},
{in: "en-US-u-co-phonebk", lang: "en", region: "US", ext: "u-co-phonebk"},
{in: "en-US-u-co-phonebk-cu-xau", lang: "en", region: "US", ext: "u-co-phonebk-cu-xau"},
{in: "en-scotland-u-co-phonebk", lang: "en", variants: "scotland", ext: "u-co-phonebk"},
{in: "en-u-cu-xua-co-phonebk", lang: "en", ext: "u-co-phonebk-cu-xua", changed: true},
{in: "en-u-def-abc-cu-xua-co-phonebk", lang: "en", ext: "u-abc-def-co-phonebk-cu-xua", changed: true},
{in: "en-u-def-abc", lang: "en", ext: "u-abc-def", changed: true},
{in: "en-u-cu-xua-co-phonebk-a-cd", lang: "en", extList: []string{"a-cd", "u-co-phonebk-cu-xua"}, changed: true},
// Invalid "u" extension. Drop invalid parts.
{in: "en-u-cu-co-phonebk", lang: "en", extList: []string{"u-co-phonebk-cu"}, invalid: true, changed: true},
{in: "en-u-cu-xau-co", lang: "en", extList: []string{"u-co-cu-xau"}, invalid: true},
// We allow duplicate keys as the LDML spec does not explicitly prohibit it.
// TODO: Consider eliminating duplicates and returning an error.
{in: "en-u-cu-xau-co-phonebk-cu-xau", lang: "en", ext: "u-co-phonebk-cu-xau", changed: true},
{in: "en-t-en-Cyrl-NL-fonipa", lang: "en", ext: "t-en-cyrl-nl-fonipa", changed: true},
{in: "en-t-en-Cyrl-NL-fonipa-t0-abc-def", lang: "en", ext: "t-en-cyrl-nl-fonipa-t0-abc-def", changed: true},
{in: "en-t-t0-abcd", lang: "en", ext: "t-t0-abcd"},
// Not necessary to have changed here.
{in: "en-t-nl-abcd", lang: "en", ext: "t-nl", invalid: true},
{in: "en-t-nl-latn", lang: "en", ext: "t-nl-latn"},
{in: "en-t-t0-abcd-x-a", lang: "en", extList: []string{"t-t0-abcd", "x-a"}},
{in: "en_t_pt_MLt", lang: "en", ext: "t-pt-mlt", changed: true},
{in: "en-t-fr-est", lang: "en", ext: "t-fr-est", changed: false},
{in: "fr-est", lang: "et", changed: true},
{in: "fr-est-t-fr-est", lang: "et", ext: "t-fr-est", changed: true},
{in: "fr-est-Cyrl", lang: "et", script: "Cyrl", changed: true},
// invalid
{in: "", lang: "und", invalid: true},
{in: "-", lang: "und", invalid: true},
{in: "x", lang: "und", invalid: true},
{in: "x-", lang: "und", invalid: true},
{in: "x--", lang: "und", invalid: true},
{in: "a-a-b-c-d", lang: "und", invalid: true},
{in: "en-", lang: "en", invalid: true},
{in: "enne-", lang: "und", invalid: true},
{in: "en.", lang: "und", invalid: true},
{in: "en.-latn", lang: "und", invalid: true},
{in: "en.-en", lang: "en", invalid: true},
{in: "x-a-tooManyChars-c-d", ext: "x-a-c-d", invalid: true, changed: true},
{in: "a-tooManyChars-c-d", lang: "und", invalid: true},
// TODO: check key-value validity
// { in: "en-u-cu-xd", lang: "en", ext: "u-cu-xd", invalid: true },
{in: "en-t-abcd", lang: "en", invalid: true},
{in: "en-Latn-US-en", lang: "en", script: "Latn", region: "US", invalid: true},
// rewrites (more tests in TestGrandfathered)
{in: "zh-min-nan", lang: "nan"},
{in: "zh-yue", lang: "yue"},
{in: "zh-xiang", lang: "hsn", rewrite: true},
{in: "zh-guoyu", lang: "cmn", rewrite: true},
{in: "iw", lang: "iw"},
{in: "sgn-BE-FR", lang: "sfb", rewrite: true},
{in: "i-klingon", lang: "tlh", rewrite: true},
}
for i, tt := range tests {
tests[i].i = i
if tt.extList != nil {
tests[i].ext = strings.Join(tt.extList, "-")
}
if tt.ext != "" && tt.extList == nil {
tests[i].extList = []string{tt.ext}
}
}
return tests
}
// partChecks runs checks for each part by calling the function returned by f.
func partChecks(t *testing.T, f func(*parseTest) (Tag, bool)) {
for i, tt := range parseTests() {
tag, skip := f(&tt)
if skip {
continue
}
if l, _ := language.ParseBase(tt.lang); l != tag.lang() {
t.Errorf("%d: lang was %q; want %q", i, tag.lang(), l)
}
if sc, _ := language.ParseScript(tt.script); sc != tag.script() {
t.Errorf("%d: script was %q; want %q", i, tag.script(), sc)
}
if r, _ := language.ParseRegion(tt.region); r != tag.region() {
t.Errorf("%d: region was %q; want %q", i, tag.region(), r)
}
v := tag.tag().Variants()
if v != "" {
v = v[1:]
}
if v != tt.variants {
t.Errorf("%d: variants was %q; want %q", i, v, tt.variants)
}
if e := strings.Join(tag.tag().Extensions(), "-"); e != tt.ext {
t.Errorf("%d: extensions were %q; want %q", i, e, tt.ext)
}
}
}
func TestParse(t *testing.T) {
partChecks(t, func(tt *parseTest) (id Tag, skip bool) {
id, _ = Raw.Parse(tt.in)
return id, false
})
}
func TestErrors(t *testing.T) {
mkInvalid := func(s string) error {
return language.NewValueError([]byte(s))
}
tests := []struct {
in string
out error
}{
// invalid subtags.
{"ac", mkInvalid("ac")},
{"AC", mkInvalid("ac")},
{"aa-Uuuu", mkInvalid("Uuuu")},
{"aa-AB", mkInvalid("AB")},
// ill-formed wins over invalid.
{"ac-u", errSyntax},
{"ac-u-ca", mkInvalid("ac")},
{"ac-u-ca-co-pinyin", mkInvalid("ac")},
{"noob", errSyntax},
}
for _, tt := range tests {
_, err := Parse(tt.in)
if err != tt.out {
t.Errorf("%s: was %q; want %q", tt.in, err, tt.out)
}
}
}
func TestCompose1(t *testing.T) {
partChecks(t, func(tt *parseTest) (id Tag, skip bool) {
l, _ := ParseBase(tt.lang)
s, _ := ParseScript(tt.script)
r, _ := ParseRegion(tt.region)
v := []Variant{}
for _, x := range strings.Split(tt.variants, "-") {
p, _ := ParseVariant(x)
v = append(v, p)
}
e := []Extension{}
for _, x := range tt.extList {
p, _ := ParseExtension(x)
e = append(e, p)
}
id, _ = Raw.Compose(l, s, r, v, e)
return id, false
})
}
func TestCompose2(t *testing.T) {
partChecks(t, func(tt *parseTest) (id Tag, skip bool) {
l, _ := ParseBase(tt.lang)
s, _ := ParseScript(tt.script)
r, _ := ParseRegion(tt.region)
p := []interface{}{l, s, r, s, r, l}
for _, x := range strings.Split(tt.variants, "-") {
if x != "" {
v, _ := ParseVariant(x)
p = append(p, v)
}
}
for _, x := range tt.extList {
e, _ := ParseExtension(x)
p = append(p, e)
}
id, _ = Raw.Compose(p...)
return id, false
})
}
func TestCompose3(t *testing.T) {
partChecks(t, func(tt *parseTest) (id Tag, skip bool) {
id, _ = Raw.Parse(tt.in)
id, _ = Raw.Compose(id)
return id, false
})
}
func mk(s string) Tag {
return Raw.Make(s)
}
func TestParseAcceptLanguage(t *testing.T) {
type res struct {
t Tag
q float32
}
en := []res{{mk("en"), 1.0}}
tests := []struct {
out []res
in string
ok bool
}{
{en, "en", true},
{en, " en", true},
{en, "en ", true},
{en, " en ", true},
{en, "en,", true},
{en, ",en", true},
{en, ",,,en,,,", true},
{en, ",en;q=1", true},
// We allow an empty input, contrary to spec.
{nil, "", true},
{[]res{{mk("aa"), 1}}, "aa;", true}, // allow unspecified weight
// errors
{nil, ";", false},
{nil, "$", false},
{nil, "e;", false},
{nil, "x;", false},
{nil, "x", false},
{nil, "ac", false}, // non-existing language
{nil, "aa;q", false},
{nil, "aa;q=", false},
{nil, "aa;q=.", false},
{nil, "00-t-0o", false},
// odd fallbacks
{
[]res{{mk("en"), 0.1}},
" english ;q=.1",
true,
},
{
[]res{{mk("it"), 1.0}, {mk("de"), 1.0}, {mk("fr"), 1.0}},
" italian, deutsch, french",
true,
},
// lists
{
[]res{{mk("en"), 0.1}},
"en;q=.1",
true,
},
{
[]res{{mk("mul"), 1.0}},
"*",
true,
},
{
[]res{{mk("en"), 1.0}, {mk("de"), 1.0}},
"en,de",
true,
},
{
[]res{{mk("en"), 1.0}, {mk("de"), .5}},
"en,de;q=0.5",
true,
},
{
[]res{{mk("de"), 0.8}, {mk("en"), 0.5}},
" en ; q = 0.5 , , de;q=0.8",
true,
},
{
[]res{{mk("en"), 1.0}, {mk("de"), 1.0}, {mk("fr"), 1.0}, {mk("tlh"), 1.0}},
"en,de,fr,i-klingon",
true,
},
// sorting
{
[]res{{mk("tlh"), 0.4}, {mk("de"), 0.2}, {mk("fr"), 0.2}, {mk("en"), 0.1}},
"en;q=0.1,de;q=0.2,fr;q=0.2,i-klingon;q=0.4",
true,
},
// dropping
{
[]res{{mk("fr"), 0.2}, {mk("en"), 0.1}},
"en;q=0.1,de;q=0,fr;q=0.2,i-klingon;q=0.0",
true,
},
}
for i, tt := range tests {
tags, qs, e := ParseAcceptLanguage(tt.in)
if e == nil != tt.ok {
t.Errorf("%d:%s:err: was %v; want %v", i, tt.in, e == nil, tt.ok)
}
for j, tag := range tags {
if out := tt.out[j]; !tag.equalTags(out.t) || qs[j] != out.q {
t.Errorf("%d:%s: was %s, %1f; want %s, %1f", i, tt.in, tag, qs[j], out.t, out.q)
break
}
}
}
}
func TestParseAcceptLanguageTooBig(t *testing.T) {
s := strings.Repeat("en-x-a-", 333)
_, _, err := ParseAcceptLanguage(s)
if err != language.ErrSyntax {
t.Errorf("ParseAcceptLanguage() unexpected error: got %v, want %v", err, language.ErrSyntax)
}
s += "en-x-a"
_, _, err = ParseAcceptLanguage(s)
if err != errTagListTooLarge {
t.Errorf("ParseAcceptLanguage() unexpected error: got %v, want %v", err, errTagListTooLarge)
}
}
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