package com.ruoyi.common.utils;

import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.CsvSource;

import java.util.Locale;

import static org.junit.jupiter.api.Assertions.assertEquals;

class LocaleUtilsTest {
    @ParameterizedTest
    @CsvSource({
            "zh_CN,zh,CN", "zh-CN,zh,CN", "zh,zh,CN",
            "zh_TW,zh,TW", "zh-TW,zh,TW", "tw,zh,TW",
            "en_US,en,US", "en-US,en,US", "en,en,US",
            "vi_VN,vi,VN", "vi-VN,vi,VN", "vi,vi,VN",
            "th_TH,th,TH", "th-TH,th,TH", "th,th,TH"
    })
    void parsesSupportedLanguageAliases(String input, String language, String country) {
        assertEquals(new Locale(language, country), LocaleUtils.parseLocale(input));
    }

    @Test
    void fallsBackToTraditionalChineseForMissingOrUnknownLanguage() {
        Locale expected = new Locale("zh", "TW");
        assertEquals(expected, LocaleUtils.parseLocale(null));
        assertEquals(expected, LocaleUtils.parseLocale("  "));
        assertEquals(expected, LocaleUtils.parseLocale("fr-FR"));
    }
}