def test_env_setting_returns_nicer_error_for_type_failure():
func = settings.EnvSetting('port', 'PORT', type=int)
with pytest.raises(settings.SettingError):
func({'PORT': 'notanint'})
def test_env_setting(setting, varname, type, environ, expected):
func = settings.EnvSetting(setting, varname, type)
result = func(environ)
assert result == expected