def test_prepare_catch_exception_and_return_it_in_tuple():
f = Mock(side_effect=Exception)
fn = prepare(f)
result = fn()
assert result[0] is None
assert isinstance(result[1], Exception)
def test_prepare_return_result_from_given_function_in_tuple():
f = Mock()
fn = prepare(f)
result = fn()
assert result[0] == f.return_value
assert result[1] is None
def _create_password_validator(app):
return compose(
prepare(
compose(
lambda app: app.config.get('MUSERS_PASSWORD_VALIDATOR'),
import_string
)
),
catch(ImportError, _default_validator),
catch(RuntimeError, _default_validator),
get_or_reraise
)(app)