Join the 1-day Testing & QA Summit featuring 15+ Expert Speakers.Register for FREE! Join TestMu Conference

How to use assert_warns_such_that method in Testify

Best Python code snippet using Testify_python

assertions_test.py

Source:assertions_test.py

...705        Test that assert_warns_such_that (used as a context manager)706        fails when the warnings_test method raises an exception.707        """708        with assertions.assert_raises(RuntimeError):709            with assertions.assert_warns_such_that(self._raise_exception):710                self._create_user_warning()711    def test_passes_when_warnings_test_returns_true(self):712        """713        Test that assert_warns_such_that (used as a context manager)714        passes when the warnings_test method returns True.715        This should happen if warnings is populated correctly.716        """717        def one_user_warning_caught(warnings):718            assert_equal([UserWarning], [w.category for w in warnings])719        with assertions.assert_warns_such_that(one_user_warning_caught):720            self._create_user_warning()721    def test_fails_when_warnings_test_raises_exception_with_callable(self):722        """723        Test that assert_warns_such_that (when given a callable object)724        fails when the warnings_test method raises an exception.725        """726        with assertions.assert_raises(RuntimeError):727            assertions.assert_warns_such_that(self._raise_exception,728                                              self._create_user_warning)729    def test_passes_when_warnings_test_returns_true_with_callable(self):730        """731        Test that assert_warns_such_that (when given a callable object)732        passes when the warnings_test method returns True.733        This should happen if warnings is populated correctly.734        """735        def create_multiple_warnings(warnings_count):736            for _ in range(warnings_count):737                self._create_user_warning()738        def three_warnings_caught(warnings):739            assert_equal(len(warnings), 3)740        assertions.assert_warns_such_that(three_warnings_caught,741                                          create_multiple_warnings, 3)742class DocTest(DocTestCase):743    module = assertions744if __name__ == '__main__':745    run()...

assertions.py

Source:assertions.py

...601        return _assert_warns_context_manager(warning_class=warning_class)602    else:603        with _assert_warns_context_manager(warning_class=warning_class):604            callable(*args, **kwargs)605def assert_warns_such_that(warnings_test, callable=None, *args, **kwargs):606    """607    Assert that the given warnings_test function returns True when608    called with a full list of warnings that were generated by either609    a code block (when this is used as a context manager in a `with` statement)610    or the given callable (when called with the appropriate args and kwargs).611    As a context manager:612    >>> def two_warnings_thrown(warnings):613    ...     assert len(warnings) == 2614    >>> with assert_warns_such_that(two_warnings_thrown):615    ...     warnings.warn('Hey!')616    ...     warnings.warn('Seriously!')617    Passing in a callable:618    >>> def throw_warnings(count):619    ...     for n in range(count):620    ...         warnings.warn('Warning #%i' % n)621    >>> assert_warns_such_that(two_warnings_thrown, throw_warnings, 2)622    """623    if callable is None:624        return _assert_warns_context_manager(warnings_test=warnings_test)625    else:626        with _assert_warns_context_manager(warnings_test=warnings_test):627            callable(*args, **kwargs)628def _to_characters(x):629    """Return characters that represent the object `x`, come hell or high water."""630    if isinstance(x, six.text_type):631        return x632    try:633        return six.text_type(x, 'UTF-8')634    except UnicodeDecodeError:635        return six.text_type(x, 'latin1')...

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.