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417 lines
9.2 KiB
Go
417 lines
9.2 KiB
Go
// Copyright 2013 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package language
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type matchTest struct {
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comment string
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supported string
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test []struct{ match, desired string }
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}
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var matchTests = []matchTest{
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{
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"basics",
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"fr, en-GB, en",
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[]struct{ match, desired string }{
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{"en-GB", "en-GB"},
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{"en", "en-US"},
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{"fr", "fr-FR"},
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{"fr", "ja-JP"},
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},
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},
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{
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"script fallbacks",
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"zh-CN, zh-TW, iw",
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[]struct{ match, desired string }{
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{"zh-TW", "zh-Hant"},
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{"zh-CN", "zh"},
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{"zh-CN", "zh-Hans-CN"},
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{"zh-TW", "zh-Hant-HK"},
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{"iw", "he-IT"},
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},
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},
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{
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"language-specific script fallbacks 1",
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"en, sr, nl",
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[]struct{ match, desired string }{
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{"sr", "sr-Latn"},
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{"en", "sh"},
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{"en", "hr"},
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{"en", "bs"},
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{"en", "nl-Cyrl"},
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},
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},
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{
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"language-specific script fallbacks 2",
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"en, sh",
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[]struct{ match, desired string }{
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{"sh", "sr"},
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{"sh", "sr-Cyrl"},
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{"sh", "hr"},
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},
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},
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{
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"both deprecated and not",
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"fil, tl, iw, he",
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[]struct{ match, desired string }{
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{"he", "he-IT"},
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{"he", "he"},
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{"iw", "iw"},
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{"fil", "fil-IT"},
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{"fil", "fil"},
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{"tl", "tl"},
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},
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},
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{
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"nearby languages",
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"en, fil, ro, nn",
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[]struct{ match, desired string }{
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{"fil", "tl"},
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{"ro", "mo"},
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{"nn", "nb"},
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{"en", "ja"}, // make sure default works
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},
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},
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{
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"nearby languages: Nynorsk to Bokmål",
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"en, nb",
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[]struct{ match, desired string }{
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{"nb", "nn"},
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},
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},
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{
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"nearby languages: Danish does not match nn",
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"en, nn",
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[]struct{ match, desired string }{
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{"en", "da"},
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},
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},
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{
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"nearby languages: Danish matches no",
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"en, no",
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[]struct{ match, desired string }{
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{"no", "da"},
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},
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},
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{
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"nearby languages: Danish matches nb",
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"en, nb",
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[]struct{ match, desired string }{
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{"nb", "da"},
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},
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},
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{
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"prefer matching languages over language variants.",
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"nn, en-GB",
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[]struct{ match, desired string }{
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{"en-GB", "no, en-US"},
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{"en-GB", "nb, en-US"},
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},
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},
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{
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"deprecated version is closer than same language with other differences",
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"nl, he, en-GB",
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[]struct{ match, desired string }{
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{"he", "iw, en-US"},
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},
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},
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{
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"macro equivalent is closer than same language with other differences",
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"nl, zh, en-GB, no",
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[]struct{ match, desired string }{
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{"zh", "cmn, en-US"},
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{"no", "nb, en-US"},
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},
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},
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{
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"legacy equivalent is closer than same language with other differences",
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"nl, fil, en-GB",
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[]struct{ match, desired string }{
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{"fil", "tl, en-US"},
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},
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},
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{
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"exact over equivalent",
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"en, ro, mo, ro-MD",
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[]struct{ match, desired string }{
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{"ro", "ro"},
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{"mo", "mo"},
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{"ro-MD", "ro-MD"},
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},
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},
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{
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"maximization of legacy",
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"sr-Cyrl, sr-Latn, ro, ro-MD",
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[]struct{ match, desired string }{
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{"sr-Latn", "sh"},
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{"ro-MD", "mo"},
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},
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},
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{
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"empty",
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"",
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[]struct{ match, desired string }{
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{"und", "fr"},
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{"und", "en"},
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},
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},
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{
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"private use subtags",
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"fr, en-GB, x-bork, es-ES, es-419",
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[]struct{ match, desired string }{
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{"fr", "x-piglatin"},
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{"x-bork", "x-bork"},
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},
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},
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{
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"grandfathered codes",
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"fr, i-klingon, en-Latn-US",
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[]struct{ match, desired string }{
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{"en-Latn-US", "en-GB-oed"},
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{"tlh", "i-klingon"},
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},
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},
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{
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"exact match",
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"fr, en-GB, ja, es-ES, es-MX",
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[]struct{ match, desired string }{
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{"ja", "ja, de"},
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},
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},
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{
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"simple variant match",
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"fr, en-GB, ja, es-ES, es-MX",
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[]struct{ match, desired string }{
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// Intentionally avoiding a perfect-match or two candidates for variant matches.
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{"en-GB", "de, en-US"},
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// Fall back.
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{"fr", "de, zh"},
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},
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},
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{
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"best match for traditional Chinese",
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// Scenario: An application that only supports Simplified Chinese (and some
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// other languages), but does not support Traditional Chinese. zh-Hans-CN
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// could be replaced with zh-CN, zh, or zh-Hans, it wouldn't make much of
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// a difference.
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"fr, zh-Hans-CN, en-US",
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[]struct{ match, desired string }{
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{"zh-Hans-CN", "zh-TW"},
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{"zh-Hans-CN", "zh-Hant"},
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// One can avoid a zh-Hant to zh-Hans match by including a second language
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// preference which is a better match.
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{"en-US", "zh-TW, en"},
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{"en-US", "zh-Hant-CN, en"},
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{"zh-Hans-CN", "zh-Hans, en"},
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},
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},
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// More specific region and script tie-breakers.
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{
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"more specific script should win in case regions are identical",
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"af, af-Latn, af-Arab",
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[]struct{ match, desired string }{
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{"af", "af"},
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{"af", "af-ZA"},
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{"af-Latn", "af-Latn-ZA"},
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{"af-Latn", "af-Latn"},
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},
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},
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{
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"more specific region should win",
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"nl, nl-NL, nl-BE",
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[]struct{ match, desired string }{
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{"nl", "nl"},
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{"nl", "nl-Latn"},
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{"nl-NL", "nl-Latn-NL"},
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{"nl-NL", "nl-NL"},
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},
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},
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{
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"more specific region wins over more specific script",
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"nl, nl-Latn, nl-NL, nl-BE",
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[]struct{ match, desired string }{
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{"nl", "nl"},
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{"nl-Latn", "nl-Latn"},
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{"nl-NL", "nl-NL"},
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{"nl-NL", "nl-Latn-NL"},
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},
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},
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// Region distance tie-breakers.
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{
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"region distance Portuguese",
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"pt, pt-PT",
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[]struct{ match, desired string }{
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{"pt-PT", "pt-ES"},
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},
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},
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{
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"region distance French",
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"en, fr, fr-CA, fr-CH",
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[]struct{ match, desired string }{
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{"fr-CA", "fr-US"},
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},
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},
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{
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"region distance German",
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"de-AT, de-DE, de-CH",
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[]struct{ match, desired string }{
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{"de-DE", "de"},
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},
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},
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{
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"en-AU is closer to en-GB than to en (which is en-US)",
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"en, en-GB, es-ES, es-419",
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[]struct{ match, desired string }{
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{"en-GB", "en-AU"},
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{"es-419", "es-MX"},
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{"es-ES", "es-PT"},
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},
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},
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// Test exceptions with "und".
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// When the undefined language doesn't match anything in the list, return the default, as usual.
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// max("und") = "en-Latn-US", and since matching is based on maximized tags, the undefined
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// language would normally match English. But that would produce the counterintuitive results.
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// Matching "und" to "it,en" would be "en" matching "en" to "it,und" would be "und".
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// To avoid this max("und") is defined as "und"
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{
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"undefined",
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"it, fr",
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[]struct{ match, desired string }{
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{"it", "und"},
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},
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},
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{
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"und does not match en",
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"it, en",
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[]struct{ match, desired string }{
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{"it", "und"},
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},
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},
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{
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"undefined in priority list",
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"it, und",
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[]struct{ match, desired string }{
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{"und", "und"},
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{"it", "en"},
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},
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},
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// Undefined scripts and regions.
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{
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"undefined",
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"it, fr, zh",
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[]struct{ match, desired string }{
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{"fr", "und-FR"},
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{"zh", "und-CN"},
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{"zh", "und-Hans"},
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{"zh", "und-Hant"},
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{"it", "und-Latn"},
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},
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},
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// Early termination conditions: do not consider all desired strings if
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// a match is good enough.
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{
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"match on maximized tag",
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"fr, en-GB, ja, es-ES, es-MX",
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[]struct{ match, desired string }{
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// ja-JP matches ja on likely subtags, and it's listed first,
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// thus it wins over the second preference en-GB.
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{"ja", "ja-JP, en-GB"},
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{"ja", "ja-Jpan-JP, en-GB"},
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},
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},
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{
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"pick best maximized tag",
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"ja, ja-Jpan-US, ja-JP, en, ru",
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[]struct{ match, desired string }{
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{"ja", "ja-Jpan, ru"},
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{"ja-JP", "ja-JP, ru"},
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{"ja-Jpan-US", "ja-US, ru"},
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},
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},
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{
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"termination: pick best maximized match",
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"ja, ja-Jpan, ja-JP, en, ru",
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[]struct{ match, desired string }{
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{"ja-JP", "ja-Jpan-JP, ru"},
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{"ja-Jpan", "ja-Jpan, ru"},
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},
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},
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{
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"no match on maximized",
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"en, de, fr, ja",
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[]struct{ match, desired string }{
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// de maximizes to de-DE.
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// Pick the exact match for the secondary language instead.
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{"fr", "de-CH, fr"},
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},
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},
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// Test that the CLDR parent relations are correctly preserved by the matcher.
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// These matches may change for different CLDR versions.
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{
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"parent relation preserved",
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"en, en-US, en-GB, es, es-419, pt, pt-BR, pt-PT, zh, zh-Hant, zh-Hant-HK",
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[]struct{ match, desired string }{
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{"en-GB", "en-150"},
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{"en-GB", "en-AU"},
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{"en-GB", "en-BE"},
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{"en-GB", "en-GG"},
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{"en-GB", "en-GI"},
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{"en-GB", "en-HK"},
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{"en-GB", "en-IE"},
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{"en-GB", "en-IM"},
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{"en-GB", "en-IN"},
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{"en-GB", "en-JE"},
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{"en-GB", "en-MT"},
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{"en-GB", "en-NZ"},
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{"en-GB", "en-PK"},
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{"en-GB", "en-SG"},
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{"en-GB", "en-DE"},
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{"en-GB", "en-MT"},
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{"es-419", "es-AR"},
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{"es-419", "es-BO"},
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{"es-419", "es-CL"},
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{"es-419", "es-CO"},
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{"es-419", "es-CR"},
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{"es-419", "es-CU"},
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{"es-419", "es-DO"},
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{"es-419", "es-EC"},
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{"es-419", "es-GT"},
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{"es-419", "es-HN"},
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{"es-419", "es-MX"},
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{"es-419", "es-NI"},
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{"es-419", "es-PA"},
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{"es-419", "es-PE"},
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{"es-419", "es-PR"},
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{"es-419", "es-PY"},
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{"es-419", "es-SV"},
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{"es-419", "es-US"},
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{"es-419", "es-UY"},
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{"es-419", "es-VE"},
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{"pt-PT", "pt-AO"},
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{"pt-PT", "pt-CV"},
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{"pt-PT", "pt-GW"},
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{"pt-PT", "pt-MO"},
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{"pt-PT", "pt-MZ"},
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{"pt-PT", "pt-ST"},
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{"pt-PT", "pt-TL"},
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// TODO for CLDR 24+
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// - en-001
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// - {"zh-Hant-HK", "zh-Hant-MO"},
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},
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},
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// Options and variants are inherited from user-defined settings.
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{
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"preserve Unicode extension",
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"en, de, sl-nedis",
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[]struct{ match, desired string }{
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{"de-u-co-phonebk", "de-FR-u-co-phonebk"},
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{"sl-nedis-u-cu-eur", "sl-nedis-u-cu-eur"},
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{"sl-nedis-u-cu-eur", "sl-u-cu-eur"},
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{"sl-nedis-u-cu-eur", "sl-HR-nedis-u-cu-eur"},
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},
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},
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}
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