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Diffstat (limited to 'Doc/library/test.rst')
-rw-r--r-- | Doc/library/test.rst | 33 |
1 files changed, 31 insertions, 2 deletions
diff --git a/Doc/library/test.rst b/Doc/library/test.rst index 8972091..90b4db3 100644 --- a/Doc/library/test.rst +++ b/Doc/library/test.rst @@ -284,8 +284,38 @@ The :mod:`test.test_support` module defines the following functions: This will run all tests defined in the named module. -The :mod:`test.test_support` module defines the following classes: +.. function:: catch_warning() + + This is a context manager that guards the warnings filter from being + permanently changed and records the data of the last warning that has been + issued. + + Use like this:: + + with catch_warning() as w: + warnings.warn("foo") + assert str(w.message) == "foo" + + .. versionadded:: 2.6 + + +.. function:: captured_stdout() + + This is a context manager than runs the :keyword:`with` statement body using + a :class:`StringIO.StringIO` object as sys.stdout. That object can be + retrieved using the ``as`` clause of the with statement. + + Example use:: + + with captured_stdout() as s: + print "hello" + assert s.getvalue() == "hello" + + .. versionadded:: 2.6 + + +The :mod:`test.test_support` module defines the following classes: .. class:: TransientResource(exc[, **kwargs]) @@ -314,4 +344,3 @@ The :mod:`test.test_support` module defines the following classes: .. method:: EnvironmentVarGuard.unset(envvar) Temporarily unset the environment variable ``envvar``. - |