The unittest module from PyUNIT, by Steve Purcell.
This commit is contained in:
Fred Drake
parent
46d9fda008
commit
02538200b3
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#!/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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Further information is available in the bundled documentation, and from
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http://pyunit.sourceforge.net/
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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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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 (stephen_purcell@yahoo.com)"
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__version__ = "$Revision$"[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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##############################################################################
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# A platform-specific concession to help the code work for JPython users
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##############################################################################
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plat = string.lower(sys.platform)
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_isJPython = string.find(plat, 'java') >= 0 or string.find(plat, 'jdk') >= 0
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del plat
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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 a
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tuple of values as returned by sys.exc_info().
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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"
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self.errors.append((test, err))
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def addFailure(self, test, err):
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"Called when a failure has occurred"
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self.failures.append((test, err))
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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 __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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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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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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"""
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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.__testMethod = getattr(self,methodName)
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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.__testMethod.__doc__
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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.__testMethod.__name__)
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def __str__(self):
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return "%s (%s)" % (self.__testMethod.__name__, self.__class__)
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def __repr__(self):
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return "<%s testMethod=%s>" % \
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(self.__class__, self.__testMethod.__name__)
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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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try:
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try:
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self.setUp()
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except:
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result.addError(self,self.__exc_info())
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return
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try:
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self.__testMethod()
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except AssertionError, e:
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result.addFailure(self,self.__exc_info())
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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:
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result.addError(self,self.__exc_info())
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finally:
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result.stopTest(self)
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def debug(self):
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self.setUp()
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self.__testMethod()
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self.tearDown()
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def assert_(self, expr, msg=None):
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"""Equivalent of built-in 'assert', but is not optimised out when
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__debug__ is false.
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"""
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if not expr:
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raise AssertionError, msg
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failUnless = assert_
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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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apply(self.assert_,(not expr,msg))
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def assertRaises(self, excClass, callableObj, *args, **kwargs):
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"""Assert that 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 AssertionError, excName
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def fail(self, msg=None):
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"""Fail immediately, with the given message."""
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raise AssertionError, msg
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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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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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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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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)" % (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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# Convenience functions
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##############################################################################
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def getTestCaseNames(testCaseClass, prefix, sortUsing=cmp):
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"""Extracts all the names of functions in the given test case class
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and its base classes that start with the given prefix. This is used
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by makeSuite().
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"""
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testFnNames = filter(lambda n,p=prefix: n[:len(p)] == p,
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dir(testCaseClass))
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for baseclass in testCaseClass.__bases__:
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testFnNames = testFnNames + \
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getTestCaseNames(baseclass, prefix, sortUsing=None)
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if sortUsing:
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testFnNames.sort(sortUsing)
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return testFnNames
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def makeSuite(testCaseClass, prefix='test', sortUsing=cmp):
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"""Returns a TestSuite instance built from all of the test functions
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in the given test case class whose names begin with the given
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prefix. The cases are sorted by their function names
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using the supplied comparison function, which defaults to 'cmp'.
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"""
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cases = map(testCaseClass,
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getTestCaseNames(testCaseClass, prefix, sortUsing))
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return TestSuite(cases)
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def createTestInstance(name, module=None):
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"""Finds tests by their name, optionally only within the given module.
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Return the newly-constructed test, ready to run. If the name contains a ':'
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then the portion of the name after the colon is used to find a specific
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test case within the test case class named before the colon.
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Examples:
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findTest('examples.listtests.suite')
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-- returns result of calling 'suite'
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findTest('examples.listtests.ListTestCase:checkAppend')
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-- returns result of calling ListTestCase('checkAppend')
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findTest('examples.listtests.ListTestCase:check-')
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-- returns result of calling makeSuite(ListTestCase, prefix="check")
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"""
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spec = string.split(name, ':')
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if len(spec) > 2: raise ValueError, "illegal test name: %s" % name
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if len(spec) == 1:
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testName = spec[0]
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caseName = None
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else:
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testName, caseName = spec
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parts = string.split(testName, '.')
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if module is None:
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if len(parts) < 2:
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raise ValueError, "incomplete test name: %s" % name
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constructor = __import__(string.join(parts[:-1],'.'))
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parts = parts[1:]
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else:
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constructor = module
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for part in parts:
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constructor = getattr(constructor, part)
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if not callable(constructor):
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raise ValueError, "%s is not a callable object" % constructor
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if caseName:
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if caseName[-1] == '-':
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prefix = caseName[:-1]
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if not prefix:
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raise ValueError, "prefix too short: %s" % name
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test = makeSuite(constructor, prefix=prefix)
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else:
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test = constructor(caseName)
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else:
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test = constructor()
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if not hasattr(test,"countTestCases"):
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raise TypeError, \
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"object %s found with spec %s is not a test" % (test, name)
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return test
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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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if _isJPython:
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import java.lang.System
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self.linesep = java.lang.System.getProperty("line.separator")
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else:
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self.linesep = os.linesep
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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(self.linesep)
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class _JUnitTextTestResult(TestResult):
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"""A test result class that can print formatted text results to a stream.
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Used by JUnitTextTestRunner.
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"""
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def __init__(self, stream):
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self.stream = stream
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TestResult.__init__(self)
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def addError(self, test, error):
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TestResult.addError(self,test,error)
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self.stream.write('E')
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self.stream.flush()
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if error[0] is KeyboardInterrupt:
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self.shouldStop = 1
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def addFailure(self, test, error):
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TestResult.addFailure(self,test,error)
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self.stream.write('F')
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self.stream.flush()
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def startTest(self, test):
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TestResult.startTest(self,test)
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self.stream.write('.')
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self.stream.flush()
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def printNumberedErrors(self,errFlavour,errors):
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if not errors: return
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if len(errors) == 1:
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self.stream.writeln("There was 1 %s:" % errFlavour)
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else:
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self.stream.writeln("There were %i %ss:" %
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(len(errors), errFlavour))
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i = 1
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for test,error in errors:
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errString = string.join(apply(traceback.format_exception,error),"")
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self.stream.writeln("%i) %s" % (i, test))
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self.stream.writeln(errString)
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i = i + 1
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def printErrors(self):
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self.printNumberedErrors("error",self.errors)
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def printFailures(self):
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self.printNumberedErrors("failure",self.failures)
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def printHeader(self):
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self.stream.writeln()
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if self.wasSuccessful():
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self.stream.writeln("OK (%i tests)" % self.testsRun)
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else:
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self.stream.writeln("!!!FAILURES!!!")
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self.stream.writeln("Test Results")
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self.stream.writeln()
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self.stream.writeln("Run: %i ; Failures: %i ; Errors: %i" %
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(self.testsRun, len(self.failures),
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len(self.errors)))
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def printResult(self):
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self.printHeader()
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self.printErrors()
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self.printFailures()
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class JUnitTextTestRunner:
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"""A test runner class that displays results in textual form.
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The display format approximates that of JUnit's 'textui' test runner.
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This test runner may be removed in a future version of PyUnit.
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"""
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def __init__(self, stream=sys.stderr):
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self.stream = _WritelnDecorator(stream)
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def run(self, test):
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"Run the given test case or test suite."
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result = _JUnitTextTestResult(self.stream)
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startTime = time.time()
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test(result)
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stopTime = time.time()
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self.stream.writeln()
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self.stream.writeln("Time: %.3fs" % float(stopTime - startTime))
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||||
result.printResult()
|
||||
return result
|
||||
|
||||
|
||||
##############################################################################
|
||||
# Verbose text UI
|
||||
##############################################################################
|
||||
|
||||
class _VerboseTextTestResult(TestResult):
|
||||
"""A test result class that can print formatted text results to a stream.
|
||||
|
||||
Used by VerboseTextTestRunner.
|
||||
"""
|
||||
def __init__(self, stream, descriptions):
|
||||
TestResult.__init__(self)
|
||||
self.stream = stream
|
||||
self.lastFailure = None
|
||||
self.descriptions = descriptions
|
||||
|
||||
def startTest(self, test):
|
||||
TestResult.startTest(self, test)
|
||||
if self.descriptions:
|
||||
self.stream.write(test.shortDescription() or str(test))
|
||||
else:
|
||||
self.stream.write(str(test))
|
||||
self.stream.write(" ... ")
|
||||
|
||||
def stopTest(self, test):
|
||||
TestResult.stopTest(self, test)
|
||||
if self.lastFailure is not test:
|
||||
self.stream.writeln("ok")
|
||||
|
||||
def addError(self, test, err):
|
||||
TestResult.addError(self, test, err)
|
||||
self._printError("ERROR", test, err)
|
||||
self.lastFailure = test
|
||||
if err[0] is KeyboardInterrupt:
|
||||
self.shouldStop = 1
|
||||
|
||||
def addFailure(self, test, err):
|
||||
TestResult.addFailure(self, test, err)
|
||||
self._printError("FAIL", test, err)
|
||||
self.lastFailure = test
|
||||
|
||||
def _printError(self, flavour, test, err):
|
||||
errLines = []
|
||||
separator1 = "\t" + '=' * 70
|
||||
separator2 = "\t" + '-' * 70
|
||||
if not self.lastFailure is test:
|
||||
self.stream.writeln()
|
||||
self.stream.writeln(separator1)
|
||||
self.stream.writeln("\t%s" % flavour)
|
||||
self.stream.writeln(separator2)
|
||||
for line in apply(traceback.format_exception, err):
|
||||
for l in string.split(line,"\n")[:-1]:
|
||||
self.stream.writeln("\t%s" % l)
|
||||
self.stream.writeln(separator1)
|
||||
|
||||
|
||||
class VerboseTextTestRunner:
|
||||
"""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):
|
||||
self.stream = _WritelnDecorator(stream)
|
||||
self.descriptions = descriptions
|
||||
|
||||
def run(self, test):
|
||||
"Run the given test case or test suite."
|
||||
result = _VerboseTextTestResult(self.stream, self.descriptions)
|
||||
startTime = time.time()
|
||||
test(result)
|
||||
stopTime = time.time()
|
||||
timeTaken = float(stopTime - startTime)
|
||||
self.stream.writeln("-" * 78)
|
||||
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
|
||||
|
||||
|
||||
# Which flavour of TextTestRunner is the default?
|
||||
TextTestRunner = VerboseTextTestRunner
|
||||
|
||||
|
||||
##############################################################################
|
||||
# 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 [-h|--help] [test[:(casename|prefix-)]] [...]
|
||||
|
||||
Examples:
|
||||
%(progName)s - run default set of tests
|
||||
%(progName)s MyTestSuite - run suite 'MyTestSuite'
|
||||
%(progName)s MyTestCase:checkSomething - run MyTestCase.checkSomething
|
||||
%(progName)s MyTestCase:check- - run all 'check*' test methods
|
||||
in MyTestCase
|
||||
"""
|
||||
def __init__(self, module='__main__', defaultTest=None,
|
||||
argv=None, testRunner=None):
|
||||
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.defaultTest = defaultTest
|
||||
self.testRunner = testRunner
|
||||
self.progName = os.path.basename(argv[0])
|
||||
self.parseArgs(argv)
|
||||
self.createTests()
|
||||
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:], 'hH', ['help'])
|
||||
opts = {}
|
||||
for opt, value in options:
|
||||
if opt in ('-h','-H','--help'):
|
||||
self.usageExit()
|
||||
if len(args) == 0 and self.defaultTest is None:
|
||||
raise getopt.error, "No default test is defined."
|
||||
if len(args) > 0:
|
||||
self.testNames = args
|
||||
else:
|
||||
self.testNames = (self.defaultTest,)
|
||||
except getopt.error, msg:
|
||||
self.usageExit(msg)
|
||||
|
||||
def createTests(self):
|
||||
tests = []
|
||||
for testName in self.testNames:
|
||||
tests.append(createTestInstance(testName, self.module))
|
||||
self.test = TestSuite(tests)
|
||||
|
||||
def runTests(self):
|
||||
if self.testRunner is None:
|
||||
self.testRunner = TextTestRunner()
|
||||
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)
|
||||
Loading…
Reference in New Issue