Добавлен метод `Equal` для `locales.Locale`

pkg/locales/locale.go

@@ -27,6 +27,10 @@ func (locale *Locale) IsDefault() bool {
 	return locale.ID == DefaultID
 }
 
+func (locale *Locale) Equal(other *Locale) bool {
+	return locale == other || locale != nil && other != nil && *locale == *other
+}
+
 // Возвращает язык локали, например "en", "ru"
 func (locale *Locale) GetLanguage() string {
 	lang, err := language.Parse(locale.Code)

pkg/locales/locale_test.go

@@ -36,3 +36,46 @@ func TestLocale_GetLanguage(t *testing.T) {
 		})
 	}
 }
+
+func TestLocale_Equal(t *testing.T) {
+	tests := []struct {
+		locale *Locale
+		other  *Locale
+		want   bool
+	}{
+		{
+			locale: &Locale{Code: "ru-RU"},
+			other:  &Locale{Code: "ru-RU"},
+			want:   true,
+		},
+		{
+			locale: &Locale{Code: "ru-RU"},
+			other:  &Locale{Code: "ru-RU", Fallback: "en-US"},
+			want:   false,
+		},
+		{
+			locale: &Locale{Code: "ru-RU", Fallback: "en-US"},
+			other:  &Locale{Code: "ru-RU"},
+			want:   false,
+		},
+		{
+			locale: &Locale{Code: "ru-RU"},
+			other:  nil,
+			want:   false,
+		},
+		{
+			locale: nil,
+			other:  &Locale{Code: "ru-RU"},
+			want:   false,
+		},
+		{
+			locale: nil,
+			other:  nil,
+			want:   true,
+		},
+	}
+	for _, tt := range tests {
+		got := tt.locale.Equal(tt.other)
+		require.Equal(t, tt.want, got)
+	}
+}