twisted.trial._synctest._Assertions : API documentation

Known subclasses: twisted.trial.unittest.SynchronousTestCase

Replaces many of the built-in TestCase assertions. In general, these assertions provide better error messages and are easier to use in callbacks.

Method	fail	Absolutely fail the test. Do not pass go, do not collect $200.
Method	assertFalse	Fail the test if `condition` evaluates to True.
Method	assertTrue	Fail the test if `condition` evaluates to False.
Method	assertRaises	Fail the test unless calling the function `f` with the given `args` and `kwargs` raises `exception`. The failure will report the traceback and call stack of the unexpected exception.
Method	assertEqual	Fail the test if `first` and `second` are not equal.
Method	assertIs	Fail the test if `first` is not `second`. This is an obect-identity-equality test, not an object equality (i.e. `__eq__`) test.
Method	assertIsNot	Fail the test if `first` is `second`. This is an obect-identity-equality test, not an object equality (i.e. `__eq__`) test.
Method	assertNotEqual	Fail the test if `first` == `second`.
Method	assertIn	Fail the test if `containee` is not found in `container`.
Method	assertNotIn	Fail the test if `containee` is found in `container`.
Method	assertNotAlmostEqual	Fail if the two objects are equal as determined by their difference rounded to the given number of decimal places (default 7) and comparing to zero.
Method	assertAlmostEqual	Fail if the two objects are unequal as determined by their difference rounded to the given number of decimal places (default 7) and comparing to zero.
Method	assertApproximates	Fail if `first` - `second` > `tolerance`
Method	assertSubstring	Fail if `substring` does not exist within `astring`.
Method	assertNotSubstring	Fail if `astring` contains `substring`.
Method	assertWarns	Fail if the given function doesn't generate the specified warning when called. It calls the function, checks the warning, and forwards the result of the function if everything is fine.
Method	assertIsInstance	Fail if `instance` is not an instance of the given class or of one of the given classes.
Method	assertNotIsInstance	Fail if `instance` is an instance of the given class or of one of the given classes.
Method	successResultOf	Return the current success result of `deferred` or raise `self.failureException`.
Method	failureResultOf	Return the current failure result of `deferred` or raise `self.failureException`.
Method	assertNoResult	Assert that `deferred` does not have a result at this point.
Method	assertRegex	Fail the test if a `regexp` search of `text` fails.

def fail(self, msg=None): (source)

Absolutely fail the test. Do not pass go, do not collect $200.

Parameters msg the message that will be displayed as the reason for the failure

def assertFalse(self, condition, msg=None): (source)

Fail the test if condition evaluates to True.

Parameters condition any object that defines __nonzero__

def assertTrue(self, condition, msg=None): (source)

Fail the test if condition evaluates to False.

Parameters condition any object that defines __nonzero__

def assertRaises(self, exception, *args, f=None, **kwargs): (source)

Fail the test unless calling the function f with the given args and kwargs raises exception. The failure will report the traceback and call stack of the unexpected exception.

Parameters	exception	exception type that is to be expected
	f	the function to call
Returns	If `f` is `None`, a context manager which will make an assertion about the exception raised from the suite it manages. If `f` is not `None`, the exception raised by `f`.
Raises	self.failureException	Raised if the function call does not raise an exception or if it raises an exception of a different type.

def assertEqual(self, first, second, msg=None): (source)

Fail the test if first and second are not equal.

Parameters msg A string describing the failure that's included in the exception.

def assertIs(self, first, second, msg=None): (source)

Fail the test if first is not second. This is an obect-identity-equality test, not an object equality (i.e. __eq__) test.

Parameters msg if msg is None, then the failure message will be '%r is not %r' % (first, second)

def assertIsNot(self, first, second, msg=None): (source)

Fail the test if first is second. This is an obect-identity-equality test, not an object equality (i.e. __eq__) test.

Parameters msg if msg is None, then the failure message will be '%r is %r' % (first, second)

def assertNotEqual(self, first, second, msg=None): (source)

Fail the test if first == second.

Parameters msg if msg is None, then the failure message will be '%r == %r' % (first, second)

def assertIn(self, containee, container, msg=None): (source)

Fail the test if containee is not found in container.

Parameters	containee	the value that should be in `container`
	container	a sequence type, or in the case of a mapping type, will follow semantics of 'if key in dict.keys()'
	msg	if msg is None, then the failure message will be '%r not in %r' % (first, second)

def assertNotIn(self, containee, container, msg=None): (source)

Fail the test if containee is found in container.

Parameters	containee	the value that should not be in `container`
	container	a sequence type, or in the case of a mapping type, will follow semantics of 'if key in dict.keys()'
	msg	if msg is None, then the failure message will be '%r in %r' % (first, second)

def assertNotAlmostEqual(self, first, second, places=7, msg=None): (source)

Fail if the two objects are equal as determined by their difference rounded to the given number of decimal places (default 7) and comparing to zero.

Notes	decimal places (from zero) is usually not the same as significant digits (measured from the most significant digit).
	included for compatibility with PyUnit test cases

def assertAlmostEqual(self, first, second, places=7, msg=None): (source)

Fail if the two objects are unequal as determined by their difference rounded to the given number of decimal places (default 7) and comparing to zero.

Notes	decimal places (from zero) is usually not the same as significant digits (measured from the most significant digit).
	included for compatibility with PyUnit test cases

def assertApproximates(self, first, second, tolerance, msg=None): (source)

Fail if first - second > tolerance

Parameters msg if msg is None, then the failure message will be '%r ~== %r' % (first, second)

def assertSubstring(self, substring, astring, msg=None): (source)

Fail if substring does not exist within astring.

def assertNotSubstring(self, substring, astring, msg=None): (source)

Fail if astring contains substring.

def assertWarns(self, category, message, filename, f, *args, **kwargs): (source)

Fail if the given function doesn't generate the specified warning when called. It calls the function, checks the warning, and forwards the result of the function if everything is fine.

Parameters	category	the category of the warning to check.
	message	the output message of the warning to check.
	filename	the filename where the warning should come from.
	f	the function which is supposed to generate the warning. (type: any callable.)
	args	the arguments to `f`.
	kwargs	the keywords arguments to `f`.
Returns	the result of the original function `f`.

def assertIsInstance(self, instance, classOrTuple, message=None): (source)

Fail if instance is not an instance of the given class or of one of the given classes.

Parameters	instance	the object to test the type (first argument of the `isinstance` call). (type: any.)
	classOrTuple	the class or classes to test against (second argument of the `isinstance` call). (type: class, type, or tuple.)
	message	Custom text to include in the exception text if the assertion fails.

def assertNotIsInstance(self, instance, classOrTuple): (source)

Fail if instance is an instance of the given class or of one of the given classes.

Parameters	instance	the object to test the type (first argument of the `isinstance` call). (type: any.)
	classOrTuple	the class or classes to test against (second argument of the `isinstance` call). (type: class, type, or tuple.)

def successResultOf(self, deferred): (source)

Return the current success result of deferred or raise self.failureException.

Parameters	deferred	A `Deferred` which has a success result. This means `Deferred.callback` or `Deferred.errback` has been called on it and it has reached the end of its callback chain and the last callback or errback returned a non-`failure.Failure`. (type: `Deferred`)
Returns	The result of `deferred`.
Raises	SynchronousTestCase.failureException	If the `Deferred` has no result or has a failure result.

def failureResultOf(self, deferred, *expectedExceptionTypes): (source)

Return the current failure result of deferred or raise self.failureException.

Parameters	deferred	A `Deferred` which has a failure result. This means `Deferred.callback` or `Deferred.errback` has been called on it and it has reached the end of its callback chain and the last callback or errback raised an exception or returned a `failure.Failure`. (type: `Deferred`)
	expectedExceptionTypes	Exception types to expect - if provided, and the exception wrapped by the failure result is not one of the types provided, then this test will fail.
Returns	The failure result of `deferred`. (type: `failure.Failure`)
Raises	SynchronousTestCase.failureException	If the `Deferred` has no result, has a success result, or has an unexpected failure result.

def assertNoResult(self, deferred): (source)

Assert that deferred does not have a result at this point.

If the assertion succeeds, then the result of deferred is left unchanged. Otherwise, any failure.Failure result is swallowed.

Parameters	deferred	A `Deferred` without a result. This means that neither `Deferred.callback` nor `Deferred.errback` has been called, or that the `Deferred` is waiting on another `Deferred` for a result. (type: `Deferred`)
Raises	SynchronousTestCase.failureException	If the `Deferred` has a result.

def assertRegex(self, text, regex, msg=None): (source)

Fail the test if a regexp search of text fails.

Parameters	text	Text which is under test. (type: `str`)
	regex	A regular expression object or a string containing a regular expression suitable for use by re.search(). (type: `str` or `re.RegexObject`)
	msg	Text used as the error message on failure. (type: `str`)

API Documentation for Twisted, generated by pydoctor at 2018-10-15 19:29:43.

twisted.trial._synctest._Assertions(pyunit.TestCase, object) class documentation

`twisted.trial._synctest._Assertions(pyunit.TestCase, object)` class documentation