func TestNew(t *testing.T) {
tests := []struct {
localeID string
lang *language.Language
}{
{"en-US", language.LanguageWithID("en")},
{"en_US", language.LanguageWithID("en")},
{"zh-CN", language.LanguageWithID("zh")},
{"zh-TW", language.LanguageWithID("zh")},
{"pt-BR", language.LanguageWithID("pt-BR")},
{"pt_BR", language.LanguageWithID("pt-BR")},
{"pt-PT", language.LanguageWithID("pt")},
{"pt_PT", language.LanguageWithID("pt")},
{"zh-Hans-CN", nil},
{"zh-Hant-TW", nil},
{"xx-Yyen-US", nil},
{"en US", nil},
{"en-US-en-US", nil},
{".en-US..en-US.", nil},
}
for _, test := range tests {
loc, err := New(test.localeID)
if loc == nil && test.lang != nil {
t.Errorf("New(%q) = <nil>, %q; expected %q, <nil>", test.localeID, err, test.lang)
}
if loc != nil && loc.Language != test.lang {
t.Errorf("New(%q) = %q; expected %q", test.localeID, loc.Language, test.lang)
}
}
}
// New searches s for a valid language tag (RFC 5646)
// of the form xx-YY or xx_YY where
// xx is a 2 character language code and
// YY is a 2 character country code.
//
// It returns an error if s doesn't contain exactly one language tag or
// if the language represented by the tag is not supported by this package.
func New(s string) (*Locale, error) {
parts := tagSplitter.Split(s, -1)
var id, lc string
count := 0
for _, part := range parts {
if tag := tagMatcher.FindStringSubmatch(part); tag != nil {
count += 1
id, lc = tag[0], tag[1]
}
}
if count != 1 {
return nil, fmt.Errorf("%d locales found in string %s", count, s)
}
id = strings.Replace(id, "_", "-", -1)
lang := language.LanguageWithID(id)
if lang == nil {
lang = language.LanguageWithID(lc)
}
if lang == nil {
return nil, fmt.Errorf("unknown language %s", id)
}
return &Locale{id, lang}, nil
}