mirror of
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2513357c4b
of the PyUNIT version of the same file. This helps people understand that this version is the same as the version from the independent PyUNIT release (confusion was indicated on the PyUNIT mailing list).
723 lines
25 KiB
Python
723 lines
25 KiB
Python
#!/usr/bin/env python
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'''
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Python unit testing framework, based on Erich Gamma's JUnit and Kent Beck's
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Smalltalk testing framework.
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This module contains the core framework classes that form the basis of
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specific test cases and suites (TestCase, TestSuite etc.), and also a
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text-based utility class for running the tests and reporting the results
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(TextTestRunner).
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Simple usage:
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import unittest
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class IntegerArithmenticTestCase(unittest.TestCase):
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def testAdd(self): ## test method names begin 'test*'
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self.assertEquals((1 + 2), 3)
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self.assertEquals(0 + 1, 1)
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def testMultiply(self):
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self.assertEquals((0 * 10), 0)
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self.assertEquals((5 * 8), 40)
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if __name__ == '__main__':
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unittest.main()
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Further information is available in the bundled documentation, and from
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http://pyunit.sourceforge.net/
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Copyright (c) 1999, 2000, 2001 Steve Purcell
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This module is free software, and you may redistribute it and/or modify
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it under the same terms as Python itself, so long as this copyright message
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and disclaimer are retained in their original form.
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IN NO EVENT SHALL THE AUTHOR BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT,
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SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF
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THIS CODE, EVEN IF THE AUTHOR HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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DAMAGE.
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THE AUTHOR SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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PARTICULAR PURPOSE. THE CODE PROVIDED HEREUNDER IS ON AN "AS IS" BASIS,
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AND THERE IS NO OBLIGATION WHATSOEVER TO PROVIDE MAINTENANCE,
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SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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'''
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__author__ = "Steve Purcell"
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__email__ = "stephen_purcell at yahoo dot com"
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__version__ = "#Revision: 1.43 $"[11:-2]
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import time
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import sys
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import traceback
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import string
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import os
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import types
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##############################################################################
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# Test framework core
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##############################################################################
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class TestResult:
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"""Holder for test result information.
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Test results are automatically managed by the TestCase and TestSuite
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classes, and do not need to be explicitly manipulated by writers of tests.
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Each instance holds the total number of tests run, and collections of
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failures and errors that occurred among those test runs. The collections
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contain tuples of (testcase, exceptioninfo), where exceptioninfo is the
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formatted traceback of the error that occurred.
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"""
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def __init__(self):
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self.failures = []
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self.errors = []
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self.testsRun = 0
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self.shouldStop = 0
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def startTest(self, test):
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"Called when the given test is about to be run"
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self.testsRun = self.testsRun + 1
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def stopTest(self, test):
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"Called when the given test has been run"
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pass
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def addError(self, test, err):
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"""Called when an error has occurred. 'err' is a tuple of values as
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returned by sys.exc_info().
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"""
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self.errors.append((test, self._exc_info_to_string(err)))
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def addFailure(self, test, err):
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"""Called when an error has occurred. 'err' is a tuple of values as
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returned by sys.exc_info()."""
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self.failures.append((test, self._exc_info_to_string(err)))
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def addSuccess(self, test):
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"Called when a test has completed successfully"
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pass
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def wasSuccessful(self):
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"Tells whether or not this result was a success"
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return len(self.failures) == len(self.errors) == 0
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def stop(self):
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"Indicates that the tests should be aborted"
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self.shouldStop = 1
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def _exc_info_to_string(self, err):
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"""Converts a sys.exc_info()-style tuple of values into a string."""
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return string.join(apply(traceback.format_exception, err), '')
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def __repr__(self):
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return "<%s run=%i errors=%i failures=%i>" % \
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(self.__class__, self.testsRun, len(self.errors),
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len(self.failures))
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class TestCase:
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"""A class whose instances are single test cases.
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By default, the test code itself should be placed in a method named
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'runTest'.
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If the fixture may be used for many test cases, create as
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many test methods as are needed. When instantiating such a TestCase
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subclass, specify in the constructor arguments the name of the test method
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that the instance is to execute.
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Test authors should subclass TestCase for their own tests. Construction
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and deconstruction of the test's environment ('fixture') can be
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implemented by overriding the 'setUp' and 'tearDown' methods respectively.
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If it is necessary to override the __init__ method, the base class
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__init__ method must always be called. It is important that subclasses
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should not change the signature of their __init__ method, since instances
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of the classes are instantiated automatically by parts of the framework
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in order to be run.
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"""
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# This attribute determines which exception will be raised when
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# the instance's assertion methods fail; test methods raising this
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# exception will be deemed to have 'failed' rather than 'errored'
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failureException = AssertionError
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def __init__(self, methodName='runTest'):
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"""Create an instance of the class that will use the named test
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method when executed. Raises a ValueError if the instance does
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not have a method with the specified name.
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"""
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try:
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self.__testMethodName = methodName
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testMethod = getattr(self, methodName)
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self.__testMethodDoc = testMethod.__doc__
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except AttributeError:
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raise ValueError, "no such test method in %s: %s" % \
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(self.__class__, methodName)
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def setUp(self):
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"Hook method for setting up the test fixture before exercising it."
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pass
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def tearDown(self):
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"Hook method for deconstructing the test fixture after testing it."
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pass
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def countTestCases(self):
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return 1
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def defaultTestResult(self):
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return TestResult()
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def shortDescription(self):
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"""Returns a one-line description of the test, or None if no
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description has been provided.
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The default implementation of this method returns the first line of
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the specified test method's docstring.
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"""
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doc = self.__testMethodDoc
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return doc and string.strip(string.split(doc, "\n")[0]) or None
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def id(self):
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return "%s.%s" % (self.__class__, self.__testMethodName)
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def __str__(self):
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return "%s (%s)" % (self.__testMethodName, self.__class__)
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def __repr__(self):
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return "<%s testMethod=%s>" % \
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(self.__class__, self.__testMethodName)
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def run(self, result=None):
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return self(result)
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def __call__(self, result=None):
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if result is None: result = self.defaultTestResult()
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result.startTest(self)
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testMethod = getattr(self, self.__testMethodName)
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try:
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try:
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self.setUp()
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except KeyboardInterrupt:
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raise
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except:
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result.addError(self, self.__exc_info())
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return
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ok = 0
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try:
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testMethod()
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ok = 1
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except self.failureException, e:
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result.addFailure(self, self.__exc_info())
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except KeyboardInterrupt:
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raise
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except:
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result.addError(self, self.__exc_info())
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try:
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self.tearDown()
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except KeyboardInterrupt:
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raise
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except:
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result.addError(self, self.__exc_info())
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ok = 0
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if ok: result.addSuccess(self)
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finally:
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result.stopTest(self)
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def debug(self):
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"""Run the test without collecting errors in a TestResult"""
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self.setUp()
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getattr(self, self.__testMethodName)()
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self.tearDown()
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def __exc_info(self):
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"""Return a version of sys.exc_info() with the traceback frame
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minimised; usually the top level of the traceback frame is not
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needed.
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"""
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exctype, excvalue, tb = sys.exc_info()
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if sys.platform[:4] == 'java': ## tracebacks look different in Jython
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return (exctype, excvalue, tb)
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newtb = tb.tb_next
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if newtb is None:
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return (exctype, excvalue, tb)
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return (exctype, excvalue, newtb)
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def fail(self, msg=None):
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"""Fail immediately, with the given message."""
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raise self.failureException, msg
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def failIf(self, expr, msg=None):
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"Fail the test if the expression is true."
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if expr: raise self.failureException, msg
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def failUnless(self, expr, msg=None):
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"""Fail the test unless the expression is true."""
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if not expr: raise self.failureException, msg
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def failUnlessRaises(self, excClass, callableObj, *args, **kwargs):
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"""Fail unless an exception of class excClass is thrown
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by callableObj when invoked with arguments args and keyword
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arguments kwargs. If a different type of exception is
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thrown, it will not be caught, and the test case will be
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deemed to have suffered an error, exactly as for an
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unexpected exception.
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"""
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try:
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apply(callableObj, args, kwargs)
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except excClass:
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return
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else:
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if hasattr(excClass,'__name__'): excName = excClass.__name__
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else: excName = str(excClass)
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raise self.failureException, excName
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def failUnlessEqual(self, first, second, msg=None):
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"""Fail if the two objects are unequal as determined by the '!='
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operator.
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"""
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if first != second:
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raise self.failureException, \
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(msg or '%s != %s' % (`first`, `second`))
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def failIfEqual(self, first, second, msg=None):
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"""Fail if the two objects are equal as determined by the '=='
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operator.
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"""
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if first == second:
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raise self.failureException, \
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(msg or '%s == %s' % (`first`, `second`))
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assertEqual = assertEquals = failUnlessEqual
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assertNotEqual = assertNotEquals = failIfEqual
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assertRaises = failUnlessRaises
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assert_ = failUnless
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class TestSuite:
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"""A test suite is a composite test consisting of a number of TestCases.
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For use, create an instance of TestSuite, then add test case instances.
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When all tests have been added, the suite can be passed to a test
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runner, such as TextTestRunner. It will run the individual test cases
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in the order in which they were added, aggregating the results. When
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subclassing, do not forget to call the base class constructor.
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"""
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def __init__(self, tests=()):
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self._tests = []
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self.addTests(tests)
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def __repr__(self):
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return "<%s tests=%s>" % (self.__class__, self._tests)
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__str__ = __repr__
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def countTestCases(self):
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cases = 0
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for test in self._tests:
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cases = cases + test.countTestCases()
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return cases
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def addTest(self, test):
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self._tests.append(test)
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def addTests(self, tests):
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for test in tests:
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self.addTest(test)
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def run(self, result):
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return self(result)
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def __call__(self, result):
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for test in self._tests:
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if result.shouldStop:
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break
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test(result)
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return result
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def debug(self):
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"""Run the tests without collecting errors in a TestResult"""
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for test in self._tests: test.debug()
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|
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class FunctionTestCase(TestCase):
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"""A test case that wraps a test function.
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|
This is useful for slipping pre-existing test functions into the
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PyUnit framework. Optionally, set-up and tidy-up functions can be
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supplied. As with TestCase, the tidy-up ('tearDown') function will
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always be called if the set-up ('setUp') function ran successfully.
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"""
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def __init__(self, testFunc, setUp=None, tearDown=None,
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description=None):
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TestCase.__init__(self)
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self.__setUpFunc = setUp
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self.__tearDownFunc = tearDown
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self.__testFunc = testFunc
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self.__description = description
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def setUp(self):
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if self.__setUpFunc is not None:
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self.__setUpFunc()
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def tearDown(self):
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if self.__tearDownFunc is not None:
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self.__tearDownFunc()
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def runTest(self):
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self.__testFunc()
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def id(self):
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return self.__testFunc.__name__
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def __str__(self):
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return "%s (%s)" % (self.__class__, self.__testFunc.__name__)
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def __repr__(self):
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return "<%s testFunc=%s>" % (self.__class__, self.__testFunc)
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|
def shortDescription(self):
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if self.__description is not None: return self.__description
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doc = self.__testFunc.__doc__
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return doc and string.strip(string.split(doc, "\n")[0]) or None
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|
|
|
|
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##############################################################################
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# Locating and loading tests
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##############################################################################
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class TestLoader:
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|
"""This class is responsible for loading tests according to various
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|
criteria and returning them wrapped in a Test
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"""
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testMethodPrefix = 'test'
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sortTestMethodsUsing = cmp
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suiteClass = TestSuite
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def loadTestsFromTestCase(self, testCaseClass):
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"""Return a suite of all tests cases contained in testCaseClass"""
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return self.suiteClass(map(testCaseClass,
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self.getTestCaseNames(testCaseClass)))
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def loadTestsFromModule(self, module):
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"""Return a suite of all tests cases contained in the given module"""
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tests = []
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for name in dir(module):
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obj = getattr(module, name)
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if type(obj) == types.ClassType and issubclass(obj, TestCase):
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tests.append(self.loadTestsFromTestCase(obj))
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return self.suiteClass(tests)
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|
|
def loadTestsFromName(self, name, module=None):
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"""Return a suite of all tests cases given a string specifier.
|
|
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|
The name may resolve either to a module, a test case class, a
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test method within a test case class, or a callable object which
|
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returns a TestCase or TestSuite instance.
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|
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The method optionally resolves the names relative to a given module.
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|
"""
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parts = string.split(name, '.')
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if module is None:
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|
if not parts:
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raise ValueError, "incomplete test name: %s" % name
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|
else:
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parts_copy = parts[:]
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|
while parts_copy:
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try:
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|
module = __import__(string.join(parts_copy,'.'))
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|
break
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except ImportError:
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|
del parts_copy[-1]
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|
if not parts_copy: raise
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parts = parts[1:]
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obj = module
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for part in parts:
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|
obj = getattr(obj, part)
|
|
|
|
import unittest
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|
if type(obj) == types.ModuleType:
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|
return self.loadTestsFromModule(obj)
|
|
elif type(obj) == types.ClassType and issubclass(obj, unittest.TestCase):
|
|
return self.loadTestsFromTestCase(obj)
|
|
elif type(obj) == types.UnboundMethodType:
|
|
return obj.im_class(obj.__name__)
|
|
elif callable(obj):
|
|
test = obj()
|
|
if not isinstance(test, unittest.TestCase) and \
|
|
not isinstance(test, unittest.TestSuite):
|
|
raise ValueError, \
|
|
"calling %s returned %s, not a test" % (obj,test)
|
|
return test
|
|
else:
|
|
raise ValueError, "don't know how to make test from: %s" % obj
|
|
|
|
def loadTestsFromNames(self, names, module=None):
|
|
"""Return a suite of all tests cases found using the given sequence
|
|
of string specifiers. See 'loadTestsFromName()'.
|
|
"""
|
|
suites = []
|
|
for name in names:
|
|
suites.append(self.loadTestsFromName(name, module))
|
|
return self.suiteClass(suites)
|
|
|
|
def getTestCaseNames(self, testCaseClass):
|
|
"""Return a sorted sequence of method names found within testCaseClass
|
|
"""
|
|
testFnNames = filter(lambda n,p=self.testMethodPrefix: n[:len(p)] == p,
|
|
dir(testCaseClass))
|
|
for baseclass in testCaseClass.__bases__:
|
|
for testFnName in self.getTestCaseNames(baseclass):
|
|
if testFnName not in testFnNames: # handle overridden methods
|
|
testFnNames.append(testFnName)
|
|
if self.sortTestMethodsUsing:
|
|
testFnNames.sort(self.sortTestMethodsUsing)
|
|
return testFnNames
|
|
|
|
|
|
|
|
defaultTestLoader = TestLoader()
|
|
|
|
|
|
##############################################################################
|
|
# Patches for old functions: these functions should be considered obsolete
|
|
##############################################################################
|
|
|
|
def _makeLoader(prefix, sortUsing, suiteClass=None):
|
|
loader = TestLoader()
|
|
loader.sortTestMethodsUsing = sortUsing
|
|
loader.testMethodPrefix = prefix
|
|
if suiteClass: loader.suiteClass = suiteClass
|
|
return loader
|
|
|
|
def getTestCaseNames(testCaseClass, prefix, sortUsing=cmp):
|
|
return _makeLoader(prefix, sortUsing).getTestCaseNames(testCaseClass)
|
|
|
|
def makeSuite(testCaseClass, prefix='test', sortUsing=cmp, suiteClass=TestSuite):
|
|
return _makeLoader(prefix, sortUsing, suiteClass).loadTestsFromTestCase(testCaseClass)
|
|
|
|
def findTestCases(module, prefix='test', sortUsing=cmp, suiteClass=TestSuite):
|
|
return _makeLoader(prefix, sortUsing, suiteClass).loadTestsFromModule(module)
|
|
|
|
|
|
##############################################################################
|
|
# Text UI
|
|
##############################################################################
|
|
|
|
class _WritelnDecorator:
|
|
"""Used to decorate file-like objects with a handy 'writeln' method"""
|
|
def __init__(self,stream):
|
|
self.stream = stream
|
|
|
|
def __getattr__(self, attr):
|
|
return getattr(self.stream,attr)
|
|
|
|
def writeln(self, *args):
|
|
if args: apply(self.write, args)
|
|
self.write('\n') # text-mode streams translate to \r\n if needed
|
|
|
|
|
|
class _TextTestResult(TestResult):
|
|
"""A test result class that can print formatted text results to a stream.
|
|
|
|
Used by TextTestRunner.
|
|
"""
|
|
separator1 = '=' * 70
|
|
separator2 = '-' * 70
|
|
|
|
def __init__(self, stream, descriptions, verbosity):
|
|
TestResult.__init__(self)
|
|
self.stream = stream
|
|
self.showAll = verbosity > 1
|
|
self.dots = verbosity == 1
|
|
self.descriptions = descriptions
|
|
|
|
def getDescription(self, test):
|
|
if self.descriptions:
|
|
return test.shortDescription() or str(test)
|
|
else:
|
|
return str(test)
|
|
|
|
def startTest(self, test):
|
|
TestResult.startTest(self, test)
|
|
if self.showAll:
|
|
self.stream.write(self.getDescription(test))
|
|
self.stream.write(" ... ")
|
|
|
|
def addSuccess(self, test):
|
|
TestResult.addSuccess(self, test)
|
|
if self.showAll:
|
|
self.stream.writeln("ok")
|
|
elif self.dots:
|
|
self.stream.write('.')
|
|
|
|
def addError(self, test, err):
|
|
TestResult.addError(self, test, err)
|
|
if self.showAll:
|
|
self.stream.writeln("ERROR")
|
|
elif self.dots:
|
|
self.stream.write('E')
|
|
|
|
def addFailure(self, test, err):
|
|
TestResult.addFailure(self, test, err)
|
|
if self.showAll:
|
|
self.stream.writeln("FAIL")
|
|
elif self.dots:
|
|
self.stream.write('F')
|
|
|
|
def printErrors(self):
|
|
if self.dots or self.showAll:
|
|
self.stream.writeln()
|
|
self.printErrorList('ERROR', self.errors)
|
|
self.printErrorList('FAIL', self.failures)
|
|
|
|
def printErrorList(self, flavour, errors):
|
|
for test, err in errors:
|
|
self.stream.writeln(self.separator1)
|
|
self.stream.writeln("%s: %s" % (flavour,self.getDescription(test)))
|
|
self.stream.writeln(self.separator2)
|
|
self.stream.writeln("%s" % err)
|
|
|
|
|
|
class TextTestRunner:
|
|
"""A test runner class that displays results in textual form.
|
|
|
|
It prints out the names of tests as they are run, errors as they
|
|
occur, and a summary of the results at the end of the test run.
|
|
"""
|
|
def __init__(self, stream=sys.stderr, descriptions=1, verbosity=1):
|
|
self.stream = _WritelnDecorator(stream)
|
|
self.descriptions = descriptions
|
|
self.verbosity = verbosity
|
|
|
|
def _makeResult(self):
|
|
return _TextTestResult(self.stream, self.descriptions, self.verbosity)
|
|
|
|
def run(self, test):
|
|
"Run the given test case or test suite."
|
|
result = self._makeResult()
|
|
startTime = time.time()
|
|
test(result)
|
|
stopTime = time.time()
|
|
timeTaken = float(stopTime - startTime)
|
|
result.printErrors()
|
|
self.stream.writeln(result.separator2)
|
|
run = result.testsRun
|
|
self.stream.writeln("Ran %d test%s in %.3fs" %
|
|
(run, run == 1 and "" or "s", timeTaken))
|
|
self.stream.writeln()
|
|
if not result.wasSuccessful():
|
|
self.stream.write("FAILED (")
|
|
failed, errored = map(len, (result.failures, result.errors))
|
|
if failed:
|
|
self.stream.write("failures=%d" % failed)
|
|
if errored:
|
|
if failed: self.stream.write(", ")
|
|
self.stream.write("errors=%d" % errored)
|
|
self.stream.writeln(")")
|
|
else:
|
|
self.stream.writeln("OK")
|
|
return result
|
|
|
|
|
|
|
|
##############################################################################
|
|
# Facilities for running tests from the command line
|
|
##############################################################################
|
|
|
|
class TestProgram:
|
|
"""A command-line program that runs a set of tests; this is primarily
|
|
for making test modules conveniently executable.
|
|
"""
|
|
USAGE = """\
|
|
Usage: %(progName)s [options] [test] [...]
|
|
|
|
Options:
|
|
-h, --help Show this message
|
|
-v, --verbose Verbose output
|
|
-q, --quiet Minimal output
|
|
|
|
Examples:
|
|
%(progName)s - run default set of tests
|
|
%(progName)s MyTestSuite - run suite 'MyTestSuite'
|
|
%(progName)s MyTestCase.testSomething - run MyTestCase.testSomething
|
|
%(progName)s MyTestCase - run all 'test*' test methods
|
|
in MyTestCase
|
|
"""
|
|
def __init__(self, module='__main__', defaultTest=None,
|
|
argv=None, testRunner=None, testLoader=defaultTestLoader):
|
|
if type(module) == type(''):
|
|
self.module = __import__(module)
|
|
for part in string.split(module,'.')[1:]:
|
|
self.module = getattr(self.module, part)
|
|
else:
|
|
self.module = module
|
|
if argv is None:
|
|
argv = sys.argv
|
|
self.verbosity = 1
|
|
self.defaultTest = defaultTest
|
|
self.testRunner = testRunner
|
|
self.testLoader = testLoader
|
|
self.progName = os.path.basename(argv[0])
|
|
self.parseArgs(argv)
|
|
self.runTests()
|
|
|
|
def usageExit(self, msg=None):
|
|
if msg: print msg
|
|
print self.USAGE % self.__dict__
|
|
sys.exit(2)
|
|
|
|
def parseArgs(self, argv):
|
|
import getopt
|
|
try:
|
|
options, args = getopt.getopt(argv[1:], 'hHvq',
|
|
['help','verbose','quiet'])
|
|
for opt, value in options:
|
|
if opt in ('-h','-H','--help'):
|
|
self.usageExit()
|
|
if opt in ('-q','--quiet'):
|
|
self.verbosity = 0
|
|
if opt in ('-v','--verbose'):
|
|
self.verbosity = 2
|
|
if len(args) == 0 and self.defaultTest is None:
|
|
self.test = self.testLoader.loadTestsFromModule(self.module)
|
|
return
|
|
if len(args) > 0:
|
|
self.testNames = args
|
|
else:
|
|
self.testNames = (self.defaultTest,)
|
|
self.createTests()
|
|
except getopt.error, msg:
|
|
self.usageExit(msg)
|
|
|
|
def createTests(self):
|
|
self.test = self.testLoader.loadTestsFromNames(self.testNames,
|
|
self.module)
|
|
|
|
def runTests(self):
|
|
if self.testRunner is None:
|
|
self.testRunner = TextTestRunner(verbosity=self.verbosity)
|
|
result = self.testRunner.run(self.test)
|
|
sys.exit(not result.wasSuccessful())
|
|
|
|
main = TestProgram
|
|
|
|
|
|
##############################################################################
|
|
# Executing this module from the command line
|
|
##############################################################################
|
|
|
|
if __name__ == "__main__":
|
|
main(module=None)
|