def METHOD_NAME(self):
    # standard cases
    self.assertEqual(dashboard_extras.languade_code_to_cldr('en'), 'en')
    self.assertEqual(dashboard_extras.languade_code_to_cldr('en-Us'), 'en-US')
    self.assertEqual(dashboard_extras.languade_code_to_cldr('en-gb'), 'en-GB')
    self.assertEqual(dashboard_extras.languade_code_to_cldr('az-latn'), 'az-Latn')
    self.assertEqual(dashboard_extras.languade_code_to_cldr('pa-guru'), 'pa-Guru')
    self.assertEqual(dashboard_extras.languade_code_to_cldr('sr-cyrl'), 'sr-Cyrl')
    self.assertEqual(dashboard_extras.languade_code_to_cldr('sr-cyrl-ba'), 'sr-Cyrl-BA')
    self.assertEqual(dashboard_extras.languade_code_to_cldr('ca-es-valencia'), 'ca-ES-VALENCIA')
    self.assertEqual(dashboard_extras.languade_code_to_cldr('en-us-posix'), 'en-US-POSIX')
    # traditional Chinese cases
    for language_code in ['zh-tw', 'zh-hk', 'zh-mo', 'zh-hant']:
        self.assertEqual(dashboard_extras.languade_code_to_cldr(language_code), 'zh-Hant')
    # simplified Chinese cases
    for language_code in ['zh-cn', 'zh-sg', 'zh-hans']:
        self.assertEqual(dashboard_extras.languade_code_to_cldr(language_code), 'zh')