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error if message ids mismatch #132

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merged 1 commit into from
Sep 26, 2018
Merged

error if message ids mismatch #132

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12 changes: 12 additions & 0 deletions v2/i18n/localizer.go
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Original file line number Diff line number Diff line change
Expand Up @@ -91,10 +91,22 @@ func (e *pluralizeErr) Error() string {
return fmt.Sprintf("unable to pluralize %q because there no plural rule for %q", e.messageID, e.tag)
}

type messageIDMismatchErr struct {
messageID string
defaultMessageID string
}

func (e *messageIDMismatchErr) Error() string {
return fmt.Sprintf("message id %q does not match default message id %q", e.messageID, e.defaultMessageID)
}

// Localize returns a localized message.
func (l *Localizer) Localize(lc *LocalizeConfig) (string, error) {
messageID := lc.MessageID
if lc.DefaultMessage != nil {
if messageID != "" && messageID != lc.DefaultMessage.ID {
return "", &messageIDMismatchErr{messageID: messageID, defaultMessageID: lc.DefaultMessage.ID}
}
messageID = lc.DefaultMessage.ID
}

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27 changes: 27 additions & 0 deletions v2/i18n/localizer_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,33 @@ func TestLocalizer_Localize(t *testing.T) {
expectedErr error
expectedLocalized string
}{
{
name: "message id mismatch",
defaultLanguage: language.English,
acceptLangs: []string{"en"},
conf: &LocalizeConfig{
MessageID: "HelloWorld",
DefaultMessage: &Message{
ID: "DefaultHelloWorld",
},
},
expectedErr: &messageIDMismatchErr{messageID: "HelloWorld", defaultMessageID: "DefaultHelloWorld"},
},
{
name: "message id not mismatched",
defaultLanguage: language.English,
messages: map[language.Tag][]*Message{
language.English: {{ID: "HelloWorld", Other: "Hello!"}},
},
acceptLangs: []string{"en"},
conf: &LocalizeConfig{
MessageID: "HelloWorld",
DefaultMessage: &Message{
ID: "HelloWorld",
},
},
expectedLocalized: "Hello!",
},
{
name: "missing translation from default language",
defaultLanguage: language.English,
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