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57 lines
1.9 KiB
Go
57 lines
1.9 KiB
Go
// Copyright 2015 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 internal
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import (
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"strings"
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"testing"
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"golang.org/x/text/language"
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)
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func TestInheritanceMatcher(t *testing.T) {
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for i, tt := range []struct {
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haveTags string
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wantTags string
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match string
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conf language.Confidence
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}{
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{"und,en,en-US", "en-US", "en-US", language.Exact}, // most specific match
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{"zh-Hant,zh", "zh-TW", "zh-Hant", language.High}, // zh-TW implies Hant.
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{"und,zh", "zh-TW", "und", language.High}, // zh-TW does not match zh.
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{"zh", "zh-TW", "und", language.No}, // zh-TW does not match zh.
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{"iw,en,nl", "he", "he", language.Exact}, // matches after canonicalization
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{"he,en,nl", "iw", "he", language.Exact}, // matches after canonicalization
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// Prefer first match over more specific match for various reasons:
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// a) consistency of user interface is more important than an exact match,
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// b) _if_ und is specified, it should be considered a correct and useful match,
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// Note that a call to this Match will almost always be with a single tag.
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{"und,en,en-US", "he,en-US", "und", language.High},
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} {
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have := parseTags(tt.haveTags)
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m := NewInheritanceMatcher(have)
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tag, index, conf := m.Match(parseTags(tt.wantTags)...)
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want := language.Raw.Make(tt.match)
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if tag != want {
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t.Errorf("%d:tag: got %q; want %q", i, tag, want)
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}
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if conf != language.No {
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if got, _ := language.All.Canonicalize(have[index]); got != want {
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t.Errorf("%d:index: got %q; want %q ", i, got, want)
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}
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}
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if conf != tt.conf {
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t.Errorf("%d:conf: got %v; want %v", i, conf, tt.conf)
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}
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}
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}
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func parseTags(list string) (out []language.Tag) {
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for _, s := range strings.Split(list, ",") {
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out = append(out, language.Raw.Make(strings.TrimSpace(s)))
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}
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return out
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}
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