Android 更改语言环境以进行测试

Question

我想测试当用户更改语言时字符串是否正确更新。我正在使用 Espresso 来测试字符串是否与正确的语言环境匹配，我目前正在这样更改它:

private fun changeLocale(language: String, country: String) {
    val locale = Locale(language, country)
    Locale.setDefault(locale)
    val configuration = Configuration()
    configuration.locale = locale
    context.activity.baseContext.createConfigurationContext(configuration)


    getInstrumentation().runOnMainSync {
        context.activity.recreate()
    }

}

问题是浓缩咖啡测试 onView(withText(expected)).check(matches(isDisplayed())) 断言为 false 所以我想知道设置默认值的正确方法是什么运行测试之前的语言环境？

Answer 1

根据 this回答，您可以通过编程方式更改语言环境:

public class ResourcesTestCase extends AndroidTestCase {

    private void setLocale(String language, String country) {
        Locale locale = new Locale(language, country);
        // here we update locale for date formatters
        Locale.setDefault(locale);
        // here we update locale for app resources
        Resources res = getContext().getResources();
        Configuration config = res.getConfiguration();
        config.locale = locale;
        res.updateConfiguration(config, res.getDisplayMetrics());
    }

    public void testEnglishLocale() {
        setLocale("en", "EN");
        String cancelString = getContext().getString(R.string.cancel);
        assertEquals("Cancel", cancelString);
    }

    public void testGermanLocale() {
        setLocale("de", "DE");
        String cancelString = getContext().getString(R.string.cancel);
        assertEquals("Abbrechen", cancelString);
    }

    public void testSpanishLocale() {
        setLocale("es", "ES");
        String cancelString = getContext().getString(R.string.cancel);
        assertEquals("Cancelar", cancelString);
    }

}

您可以轻松将该代码转换为 Kotlin。