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"""Tools not exempt from being descended into in tracebacks"""
__all__ = ['make_decorator', 'raises', 'set_trace', 'timed', 'with_setup', 'TimeExpired', 'istest', 'nottest']
""" Wraps a test decorator so as to properly replicate metadata of the decorated function, including nose's additional stuff (namely, setup and teardown). """ def decorate(newfunc): if hasattr(func, 'compat_func_name'): name = func.compat_func_name else: name = func.__name__ newfunc.__dict__ = func.__dict__ newfunc.__doc__ = func.__doc__ newfunc.__module__ = func.__module__ if not hasattr(newfunc, 'compat_co_firstlineno'): newfunc.compat_co_firstlineno = func.__code__.co_firstlineno try: newfunc.__name__ = name except TypeError: # can't set func name in 2.3 newfunc.compat_func_name = name return newfunc return decorate
def raises(*exceptions): """Test must raise one of expected exceptions to pass.
Example use::
@raises(TypeError, ValueError) def test_raises_type_error(): raise TypeError("This test passes")
@raises(Exception) def test_that_fails_by_passing(): pass
If you want to test many assertions about exceptions in a single test, you may want to use `assert_raises` instead. """ valid = ' or '.join([e.__name__ for e in exceptions]) def decorate(func): name = func.__name__ def newfunc(*arg, **kw): try: func(*arg, **kw) except exceptions: pass except: raise else: message = "%s() did not raise %s" % (name, valid) raise AssertionError(message) newfunc = make_decorator(func)(newfunc) return newfunc return decorate
"""Call pdb.set_trace in the calling frame, first restoring sys.stdout to the real output stream. Note that sys.stdout is NOT reset to whatever it was before the call once pdb is done! """ import pdb import sys stdout = sys.stdout sys.stdout = sys.__stdout__ pdb.Pdb().set_trace(sys._getframe().f_back)
"""Test must finish within specified time limit to pass.
Example use::
@timed(.1) def test_that_fails(): time.sleep(.2) """ def decorate(func): def newfunc(*arg, **kw): start = time.time() result = func(*arg, **kw) end = time.time() if end - start > limit: raise TimeExpired("Time limit (%s) exceeded" % limit) return result newfunc = make_decorator(func)(newfunc) return newfunc return decorate
"""Decorator to add setup and/or teardown methods to a test function::
@with_setup(setup, teardown) def test_something(): " ... "
Note that `with_setup` is useful *only* for test functions, not for test methods or inside of TestCase subclasses. """ def decorate(func, setup=setup, teardown=teardown): if setup: if hasattr(func, 'setup'): _old_s = func.setup def _s(): setup() _old_s() func.setup = _s else: func.setup = setup if teardown: if hasattr(func, 'teardown'): _old_t = func.teardown def _t(): _old_t() teardown() func.teardown = _t else: func.teardown = teardown return func return decorate
"""Decorator to mark a function or method as a test """ func.__test__ = True return func
"""Decorator to mark a function or method as *not* a test """ func.__test__ = False return func |