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732 lines
25 KiB
Python
732 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: 1.46 $"[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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# All classes defined herein are 'new-style' classes, allowing use of 'super()'
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__metaclass__ = type
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def _strclass(cls):
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return "%s.%s" % (cls.__module__, cls.__name__)
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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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(_strclass(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" % (_strclass(self.__class__), self.__testMethodName)
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def __str__(self):
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return "%s (%s)" % (self.__testMethodName, _strclass(self.__class__))
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def __repr__(self):
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return "<%s testMethod=%s>" % \
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(_strclass(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>" % (_strclass(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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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)" % (_strclass(self.__class__), self.__testFunc.__name__)
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def __repr__(self):
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return "<%s testFunc=%s>" % (_strclass(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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# 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 (isinstance(obj, (type, types.ClassType)) and
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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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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)
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import unittest
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if type(obj) == types.ModuleType:
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return self.loadTestsFromModule(obj)
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elif (isinstance(obj, (type, types.ClassType)) and
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issubclass(obj, unittest.TestCase)):
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return self.loadTestsFromTestCase(obj)
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elif type(obj) == types.UnboundMethodType:
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return obj.im_class(obj.__name__)
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elif callable(obj):
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test = obj()
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if not isinstance(test, unittest.TestCase) and \
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not isinstance(test, unittest.TestSuite):
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raise ValueError, \
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"calling %s returned %s, not a test" % (obj,test)
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return test
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else:
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raise ValueError, "don't know how to make test from: %s" % obj
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def loadTestsFromNames(self, names, module=None):
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"""Return a suite of all tests cases found using the given sequence
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of string specifiers. See 'loadTestsFromName()'.
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"""
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suites = []
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for name in names:
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suites.append(self.loadTestsFromName(name, module))
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return self.suiteClass(suites)
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def getTestCaseNames(self, testCaseClass):
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"""Return a sorted sequence of method names found within testCaseClass
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"""
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testFnNames = filter(lambda n,p=self.testMethodPrefix: n[:len(p)] == p,
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dir(testCaseClass))
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for baseclass in testCaseClass.__bases__:
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for testFnName in self.getTestCaseNames(baseclass):
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if testFnName not in testFnNames: # handle overridden methods
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testFnNames.append(testFnName)
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if self.sortTestMethodsUsing:
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testFnNames.sort(self.sortTestMethodsUsing)
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return testFnNames
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defaultTestLoader = TestLoader()
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##############################################################################
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# Patches for old functions: these functions should be considered obsolete
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##############################################################################
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def _makeLoader(prefix, sortUsing, suiteClass=None):
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loader = TestLoader()
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loader.sortTestMethodsUsing = sortUsing
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loader.testMethodPrefix = prefix
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if suiteClass: loader.suiteClass = suiteClass
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return loader
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def getTestCaseNames(testCaseClass, prefix, sortUsing=cmp):
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return _makeLoader(prefix, sortUsing).getTestCaseNames(testCaseClass)
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def makeSuite(testCaseClass, prefix='test', sortUsing=cmp, suiteClass=TestSuite):
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return _makeLoader(prefix, sortUsing, suiteClass).loadTestsFromTestCase(testCaseClass)
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def findTestCases(module, prefix='test', sortUsing=cmp, suiteClass=TestSuite):
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return _makeLoader(prefix, sortUsing, suiteClass).loadTestsFromModule(module)
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##############################################################################
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# Text UI
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##############################################################################
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class _WritelnDecorator:
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"""Used to decorate file-like objects with a handy 'writeln' method"""
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def __init__(self,stream):
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self.stream = stream
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def __getattr__(self, attr):
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return getattr(self.stream,attr)
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def writeln(self, *args):
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if args: apply(self.write, args)
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self.write('\n') # text-mode streams translate to \r\n if needed
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class _TextTestResult(TestResult):
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"""A test result class that can print formatted text results to a stream.
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Used by TextTestRunner.
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"""
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separator1 = '=' * 70
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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 "s" or "", 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)
|