148 lines
4.6 KiB
Python
148 lines
4.6 KiB
Python
"""
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exception classes and constants handling test outcomes
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as well as functions creating them
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"""
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from __future__ import absolute_import, division, print_function
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import py
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import sys
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class OutcomeException(BaseException):
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""" OutcomeException and its subclass instances indicate and
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contain info about test and collection outcomes.
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"""
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def __init__(self, msg=None, pytrace=True):
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BaseException.__init__(self, msg)
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self.msg = msg
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self.pytrace = pytrace
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def __repr__(self):
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if self.msg:
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val = self.msg
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if isinstance(val, bytes):
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val = py._builtin._totext(val, errors='replace')
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return val
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return "<%s instance>" % (self.__class__.__name__,)
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__str__ = __repr__
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TEST_OUTCOME = (OutcomeException, Exception)
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class Skipped(OutcomeException):
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# XXX hackish: on 3k we fake to live in the builtins
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# in order to have Skipped exception printing shorter/nicer
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__module__ = 'builtins'
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def __init__(self, msg=None, pytrace=True, allow_module_level=False):
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OutcomeException.__init__(self, msg=msg, pytrace=pytrace)
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self.allow_module_level = allow_module_level
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class Failed(OutcomeException):
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""" raised from an explicit call to pytest.fail() """
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__module__ = 'builtins'
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class Exit(KeyboardInterrupt):
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""" raised for immediate program exits (no tracebacks/summaries)"""
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def __init__(self, msg="unknown reason"):
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self.msg = msg
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KeyboardInterrupt.__init__(self, msg)
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# exposed helper methods
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def exit(msg):
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""" exit testing process as if KeyboardInterrupt was triggered. """
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__tracebackhide__ = True
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raise Exit(msg)
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exit.Exception = Exit
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def skip(msg="", **kwargs):
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""" skip an executing test with the given message. Note: it's usually
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better to use the pytest.mark.skipif marker to declare a test to be
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skipped under certain conditions like mismatching platforms or
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dependencies. See the pytest_skipping plugin for details.
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:kwarg bool allow_module_level: allows this function to be called at
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module level, skipping the rest of the module. Default to False.
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"""
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__tracebackhide__ = True
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allow_module_level = kwargs.pop('allow_module_level', False)
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if kwargs:
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keys = [k for k in kwargs.keys()]
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raise TypeError('unexpected keyword arguments: {}'.format(keys))
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raise Skipped(msg=msg, allow_module_level=allow_module_level)
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skip.Exception = Skipped
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def fail(msg="", pytrace=True):
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""" explicitly fail a currently-executing test with the given Message.
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:arg pytrace: if false the msg represents the full failure information
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and no python traceback will be reported.
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"""
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__tracebackhide__ = True
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raise Failed(msg=msg, pytrace=pytrace)
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fail.Exception = Failed
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class XFailed(fail.Exception):
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""" raised from an explicit call to pytest.xfail() """
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def xfail(reason=""):
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""" xfail an executing test or setup functions with the given reason."""
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__tracebackhide__ = True
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raise XFailed(reason)
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xfail.Exception = XFailed
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def importorskip(modname, minversion=None):
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""" return imported module if it has at least "minversion" as its
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__version__ attribute. If no minversion is specified the a skip
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is only triggered if the module can not be imported.
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"""
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import warnings
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__tracebackhide__ = True
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compile(modname, '', 'eval') # to catch syntaxerrors
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should_skip = False
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with warnings.catch_warnings():
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# make sure to ignore ImportWarnings that might happen because
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# of existing directories with the same name we're trying to
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# import but without a __init__.py file
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warnings.simplefilter('ignore')
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try:
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__import__(modname)
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except ImportError:
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# Do not raise chained exception here(#1485)
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should_skip = True
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if should_skip:
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raise Skipped("could not import %r" % (modname,), allow_module_level=True)
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mod = sys.modules[modname]
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if minversion is None:
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return mod
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verattr = getattr(mod, '__version__', None)
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if minversion is not None:
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try:
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from pkg_resources import parse_version as pv
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except ImportError:
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raise Skipped("we have a required version for %r but can not import "
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"pkg_resources to parse version strings." % (modname,),
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allow_module_level=True)
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if verattr is None or pv(verattr) < pv(minversion):
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raise Skipped("module %r has __version__ %r, required is: %r" % (
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modname, verattr, minversion), allow_module_level=True)
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return mod
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