032c426ac3
GUI packages, examples, and documentation for building desktop applications with Go and web technologies. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
84 lines
1.7 KiB
Go
84 lines
1.7 KiB
Go
package i18n
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import (
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"testing"
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"github.com/stretchr/testify/assert"
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"golang.org/x/text/language"
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)
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func TestDetectLanguage(t *testing.T) {
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supported := []language.Tag{
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language.English,
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language.French,
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language.Spanish,
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}
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tests := []struct {
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name string
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langEnv string
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supported []language.Tag
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expectedLang string
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expectedError string
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}{
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{
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name: "Exact match",
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langEnv: "fr",
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supported: supported,
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expectedLang: "fr",
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},
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{
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name: "Match with region",
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langEnv: "fr_CA.UTF-8",
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supported: supported,
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expectedLang: "fr",
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},
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{
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name: "Unsupported language",
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langEnv: "de",
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supported: supported,
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expectedLang: "",
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},
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{
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name: "Empty LANG",
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langEnv: "",
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supported: supported,
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expectedLang: "",
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},
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{
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name: "Invalid LANG",
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langEnv: "invalid-lang-tag",
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supported: supported,
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expectedLang: "",
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expectedError: "failed to parse language tag 'invalid-lang-tag': language: tag is not well-formed",
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},
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{
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name: "Empty supported languages",
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langEnv: "en",
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supported: []language.Tag{},
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expectedLang: "",
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},
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{
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name: "Match with low confidence",
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langEnv: "it", // Italian is not supported, confidence should be No or Low?
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supported: supported,
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expectedLang: "",
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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t.Setenv("LANG", tt.langEnv)
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lang, err := detectLanguage(tt.supported)
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if tt.expectedError != "" {
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assert.Error(t, err)
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assert.Contains(t, err.Error(), tt.expectedError)
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} else {
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assert.NoError(t, err)
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assert.Equal(t, tt.expectedLang, lang)
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}
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})
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}
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}
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