String text = "Text   with\tmultiple\n\r  spaces";
        String result = languageHelper.getDetectText(text);
        assertEquals("Text with multiple spaces", result);
    }

    public void test_getSupportedLanguage_supported() {
        assertEquals("ja", languageHelper.getSupportedLanguage("ja"));
        assertEquals("en", languageHelper.getSupportedLanguage("en"));
        assertEquals("zh", languageHelper.getSupportedLanguage("zh"));