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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,8 @@ | ||
| # Development notes | ||
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| ## How to upgrade CLDR data | ||
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| 1. Go to http://cldr.unicode.org/index/downloads to find the latest version. | ||
| 1. Download the latest version of cldr-common (e.g. http://unicode.org/Public/cldr/33/cldr-common-33.0.zip) | ||
| 1. Unzip and copy `common/supplemental/plurals.xml` to `v2/i18n/internal/plural/codegen/plurals.xml` | ||
| 1. Run `generate.sh` in `v2/i18n/internal/plural/codegen/` |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,20 @@ | ||
| package plural | ||
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| import "golang.org/x/text/language" | ||
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| // Rules is a set of plural rules by language tag. | ||
| type Rules map[language.Tag]*Rule | ||
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| // Rule returns the closest matching plural rule for the language tag | ||
| // or nil if no rule could be found. | ||
| func (r Rules) Rule(tag language.Tag) *Rule { | ||
| for { | ||
| if rule := r[tag]; rule != nil { | ||
| return rule | ||
| } | ||
| tag = tag.Parent() | ||
| if tag.IsRoot() { | ||
| return nil | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,61 @@ | ||
| package plural | ||
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| import ( | ||
| "testing" | ||
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| "golang.org/x/text/language" | ||
| ) | ||
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| func TestRules(t *testing.T) { | ||
| expectedRule := &Rule{} | ||
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| testCases := []struct { | ||
| name string | ||
| rules Rules | ||
| tag language.Tag | ||
| rule *Rule | ||
| }{ | ||
| { | ||
| name: "exact match", | ||
| rules: Rules{ | ||
| language.English: expectedRule, | ||
| language.Spanish: &Rule{}, | ||
| }, | ||
| tag: language.English, | ||
| rule: expectedRule, | ||
| }, | ||
| { | ||
| name: "inexact match", | ||
| rules: Rules{ | ||
| language.English: expectedRule, | ||
| }, | ||
| tag: language.AmericanEnglish, | ||
| rule: expectedRule, | ||
| }, | ||
| { | ||
| name: "portuguese doesn't match european portuguese", | ||
| rules: Rules{ | ||
| language.EuropeanPortuguese: &Rule{}, | ||
| }, | ||
| tag: language.Portuguese, | ||
| rule: nil, | ||
| }, | ||
| { | ||
| name: "european portuguese preferred", | ||
| rules: Rules{ | ||
| language.Portuguese: &Rule{}, | ||
| language.EuropeanPortuguese: expectedRule, | ||
| }, | ||
| tag: language.EuropeanPortuguese, | ||
| rule: expectedRule, | ||
| }, | ||
| } | ||
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| for _, testCase := range testCases { | ||
| t.Run(testCase.name, func(t *testing.T) { | ||
| if rule := testCase.rules.Rule(testCase.tag); rule != testCase.rule { | ||
| panic(rule) | ||
| } | ||
| }) | ||
| } | ||
| } |