diff options
Diffstat (limited to 'Doc/library/unittest.rst')
| -rw-r--r-- | Doc/library/unittest.rst | 52 |
1 files changed, 38 insertions, 14 deletions
diff --git a/Doc/library/unittest.rst b/Doc/library/unittest.rst index beed4de..191d5b9 100644 --- a/Doc/library/unittest.rst +++ b/Doc/library/unittest.rst @@ -723,7 +723,7 @@ Test cases Here, we create two instances of :class:`WidgetTestCase`, each of which runs a single test. - .. versionchanged:: + .. versionchanged:: 3.2 `TestCase` can be instantiated successfully without providing a method name. This makes it easier to experiment with `TestCase` from the interactive interpreter. @@ -792,11 +792,14 @@ Test cases Run the test, collecting the result into the test result object passed as *result*. If *result* is omitted or ``None``, a temporary result object is created (by calling the :meth:`defaultTestResult` method) and - used. The result object is not returned to :meth:`run`'s caller. + used. The result object is returned to :meth:`run`'s caller. The same effect may be had by simply calling the :class:`TestCase` instance. + .. versionchanged:: 3.3 + Previous versions of ``run`` did not return the result. Neither did + calling an instance. .. method:: skipTest(reason) @@ -857,10 +860,11 @@ Test cases | <TestCase.assertNotIsInstance>` | | | +-----------------------------------------+-----------------------------+---------------+ - All the assert methods (except :meth:`assertRaises`, - :meth:`assertRaisesRegex`, :meth:`assertWarns`, :meth:`assertWarnsRegex`) - accept a *msg* argument that, if specified, is used as the error message on - failure (see also :data:`longMessage`). + All the assert methods accept a *msg* argument that, if specified, is used + as the error message on failure (see also :data:`longMessage`). + Note that the *msg* keyword argument can be passed to :meth:`assertRaises`, + :meth:`assertRaisesRegex`, :meth:`assertWarns`, :meth:`assertWarnsRegex` + only when they are used as a context manager. .. method:: assertEqual(first, second, msg=None) @@ -954,7 +958,7 @@ Test cases +---------------------------------------------------------+--------------------------------------+------------+ .. method:: assertRaises(exception, callable, *args, **kwds) - assertRaises(exception) + assertRaises(exception, msg=None) Test that an exception is raised when *callable* is called with any positional or keyword arguments that are also passed to @@ -963,12 +967,16 @@ Test cases To catch any of a group of exceptions, a tuple containing the exception classes may be passed as *exception*. - If only the *exception* argument is given, returns a context manager so - that the code under test can be written inline rather than as a function:: + If only the *exception* and possibly the *msg* arguments are given, + return a context manager so that the code under test can be written + inline rather than as a function:: with self.assertRaises(SomeException): do_something() + When used as a context manager, :meth:`assertRaises` accepts the + additional keyword argument *msg*. + The context manager will store the caught exception object in its :attr:`exception` attribute. This can be useful if the intention is to perform additional checks on the exception raised:: @@ -985,9 +993,12 @@ Test cases .. versionchanged:: 3.2 Added the :attr:`exception` attribute. + .. versionchanged:: 3.3 + Added the *msg* keyword argument when used as a context manager. + .. method:: assertRaisesRegex(exception, regex, callable, *args, **kwds) - assertRaisesRegex(exception, regex) + assertRaisesRegex(exception, regex, msg=None) Like :meth:`assertRaises` but also tests that *regex* matches on the string representation of the raised exception. *regex* may be @@ -1004,12 +1015,16 @@ Test cases .. versionadded:: 3.1 under the name ``assertRaisesRegexp``. + .. versionchanged:: 3.2 Renamed to :meth:`assertRaisesRegex`. + .. versionchanged:: 3.3 + Added the *msg* keyword argument when used as a context manager. + .. method:: assertWarns(warning, callable, *args, **kwds) - assertWarns(warning) + assertWarns(warning, msg=None) Test that a warning is triggered when *callable* is called with any positional or keyword arguments that are also passed to @@ -1018,12 +1033,16 @@ Test cases To catch any of a group of warnings, a tuple containing the warning classes may be passed as *warnings*. - If only the *warning* argument is given, returns a context manager so - that the code under test can be written inline rather than as a function:: + If only the *warning* and possibly the *msg* arguments are given, + returns a context manager so that the code under test can be written + inline rather than as a function:: with self.assertWarns(SomeWarning): do_something() + When used as a context manager, :meth:`assertRaises` accepts the + additional keyword argument *msg*. + The context manager will store the caught warning object in its :attr:`warning` attribute, and the source line which triggered the warnings in the :attr:`filename` and :attr:`lineno` attributes. @@ -1041,9 +1060,12 @@ Test cases .. versionadded:: 3.2 + .. versionchanged:: 3.3 + Added the *msg* keyword argument when used as a context manager. + .. method:: assertWarnsRegex(warning, regex, callable, *args, **kwds) - assertWarnsRegex(warning, regex) + assertWarnsRegex(warning, regex, msg=None) Like :meth:`assertWarns` but also tests that *regex* matches on the message of the triggered warning. *regex* may be a regular expression @@ -1061,6 +1083,8 @@ Test cases .. versionadded:: 3.2 + .. versionchanged:: 3.3 + Added the *msg* keyword argument when used as a context manager. There are also other methods used to perform more specific checks, such as: |