The unittest module from PyUNIT, by Steve Purcell.

1 files changed, 689 insertions, 0 deletions

diff --git a/Lib/unittest.py b/Lib/unittest.py
new file mode 100644
index 0000000000..b3eec181e3
--- /dev/null
+++ b/Lib/unittest.py
@@ -0,0 +1,689 @@
+#!/usr/bin/env python
+"""
+Python unit testing framework, based on Erich Gamma's JUnit and Kent Beck's
+Smalltalk testing framework.
+
+Further information is available in the bundled documentation, and from
+
+  http://pyunit.sourceforge.net/
+
+This module contains the core framework classes that form the basis of
+specific test cases and suites (TestCase, TestSuite etc.), and also a
+text-based utility class for running the tests and reporting the results
+(TextTestRunner).
+
+Copyright (c) 1999, 2000, 2001 Steve Purcell
+This module is free software, and you may redistribute it and/or modify
+it under the same terms as Python itself, so long as this copyright message
+and disclaimer are retained in their original form.
+
+IN NO EVENT SHALL THE AUTHOR BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT,
+SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF
+THIS CODE, EVEN IF THE AUTHOR HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+DAMAGE.
+
+THE AUTHOR SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+PARTICULAR PURPOSE.  THE CODE PROVIDED HEREUNDER IS ON AN "AS IS" BASIS,
+AND THERE IS NO OBLIGATION WHATSOEVER TO PROVIDE MAINTENANCE,
+SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+"""
+
+__author__ = "Steve Purcell (stephen_purcell@yahoo.com)"
+__version__ = "$Revision$"[11:-2]
+
+import time
+import sys
+import traceback
+import string
+import os
+
+##############################################################################
+# A platform-specific concession to help the code work for JPython users
+##############################################################################
+
+plat = string.lower(sys.platform)
+_isJPython = string.find(plat, 'java') >= 0 or string.find(plat, 'jdk') >= 0
+del plat
+
+
+##############################################################################
+# Test framework core
+##############################################################################
+
+class TestResult:
+    """Holder for test result information.
+
+    Test results are automatically managed by the TestCase and TestSuite
+    classes, and do not need to be explicitly manipulated by writers of tests.
+
+    Each instance holds the total number of tests run, and collections of
+    failures and errors that occurred among those test runs. The collections
+    contain tuples of (testcase, exceptioninfo), where exceptioninfo is a
+    tuple of values as returned by sys.exc_info().
+    """
+    def __init__(self):
+        self.failures = []
+        self.errors = []
+        self.testsRun = 0
+        self.shouldStop = 0
+
+    def startTest(self, test):
+        "Called when the given test is about to be run"
+        self.testsRun = self.testsRun + 1
+
+    def stopTest(self, test):
+        "Called when the given test has been run"
+        pass
+
+    def addError(self, test, err):
+        "Called when an error has occurred"
+        self.errors.append((test, err))
+
+    def addFailure(self, test, err):
+        "Called when a failure has occurred"
+        self.failures.append((test, err))
+
+    def wasSuccessful(self):
+        "Tells whether or not this result was a success"
+        return len(self.failures) == len(self.errors) == 0
+
+    def stop(self):
+        "Indicates that the tests should be aborted"
+        self.shouldStop = 1
+    
+    def __repr__(self):
+        return "<%s run=%i errors=%i failures=%i>" % \
+               (self.__class__, self.testsRun, len(self.errors),
+                len(self.failures))
+
+
+class TestCase:
+    """A class whose instances are single test cases.
+
+    Test authors should subclass TestCase for their own tests. Construction 
+    and deconstruction of the test's environment ('fixture') can be
+    implemented by overriding the 'setUp' and 'tearDown' methods respectively.
+
+    By default, the test code itself should be placed in a method named
+    'runTest'.
+    
+    If the fixture may be used for many test cases, create as 
+    many test methods as are needed. When instantiating such a TestCase
+    subclass, specify in the constructor arguments the name of the test method
+    that the instance is to execute.
+    """
+    def __init__(self, methodName='runTest'):
+        """Create an instance of the class that will use the named test
+           method when executed. Raises a ValueError if the instance does
+           not have a method with the specified name.
+        """
+        try:
+            self.__testMethod = getattr(self,methodName)
+        except AttributeError:
+            raise ValueError, "no such test method in %s: %s" % \
+                  (self.__class__, methodName)
+
+    def setUp(self):
+        "Hook method for setting up the test fixture before exercising it."
+        pass
+
+    def tearDown(self):
+        "Hook method for deconstructing the test fixture after testing it."
+        pass
+
+    def countTestCases(self):
+        return 1
+
+    def defaultTestResult(self):
+        return TestResult()
+
+    def shortDescription(self):
+        """Returns a one-line description of the test, or None if no
+        description has been provided.
+
+        The default implementation of this method returns the first line of
+        the specified test method's docstring.
+        """
+        doc = self.__testMethod.__doc__
+        return doc and string.strip(string.split(doc, "\n")[0]) or None
+
+    def id(self):
+        return "%s.%s" % (self.__class__, self.__testMethod.__name__)
+
+    def __str__(self):
+        return "%s (%s)" % (self.__testMethod.__name__, self.__class__)
+
+    def __repr__(self):
+        return "<%s testMethod=%s>" % \
+               (self.__class__, self.__testMethod.__name__)
+
+    def run(self, result=None):
+        return self(result)
+
+    def __call__(self, result=None):
+        if result is None: result = self.defaultTestResult()
+        result.startTest(self)
+        try:
+            try:
+                self.setUp()
+            except:
+                result.addError(self,self.__exc_info())
+                return
+
+            try:
+                self.__testMethod()
+            except AssertionError, e:
+                result.addFailure(self,self.__exc_info())
+            except:
+                result.addError(self,self.__exc_info())
+
+            try:
+                self.tearDown()
+            except:
+                result.addError(self,self.__exc_info())
+        finally:
+            result.stopTest(self)
+
+    def debug(self):
+        self.setUp()
+        self.__testMethod()
+        self.tearDown()
+
+    def assert_(self, expr, msg=None):
+        """Equivalent of built-in 'assert', but is not optimised out when
+           __debug__ is false.
+        """
+        if not expr:
+            raise AssertionError, msg
+
+    failUnless = assert_
+
+    def failIf(self, expr, msg=None):
+        "Fail the test if the expression is true."
+        apply(self.assert_,(not expr,msg))
+
+    def assertRaises(self, excClass, callableObj, *args, **kwargs):
+        """Assert that an exception of class excClass is thrown
+           by callableObj when invoked with arguments args and keyword
+           arguments kwargs. If a different type of exception is
+           thrown, it will not be caught, and the test case will be
+           deemed to have suffered an error, exactly as for an
+           unexpected exception.
+        """
+        try:
+            apply(callableObj, args, kwargs)
+        except excClass:
+            return
+        else:
+            if hasattr(excClass,'__name__'): excName = excClass.__name__
+            else: excName = str(excClass)
+            raise AssertionError, excName
+
+    def fail(self, msg=None):
+        """Fail immediately, with the given message."""
+        raise AssertionError, msg
+                                   
+    def __exc_info(self):
+        """Return a version of sys.exc_info() with the traceback frame
+           minimised; usually the top level of the traceback frame is not
+           needed.
+        """
+        exctype, excvalue, tb = sys.exc_info()
+        newtb = tb.tb_next
+        if newtb is None:
+            return (exctype, excvalue, tb)
+        return (exctype, excvalue, newtb)
+
+
+class TestSuite:
+    """A test suite is a composite test consisting of a number of TestCases.
+
+    For use, create an instance of TestSuite, then add test case instances.
+    When all tests have been added, the suite can be passed to a test
+    runner, such as TextTestRunner. It will run the individual test cases
+    in the order in which they were added, aggregating the results. When
+    subclassing, do not forget to call the base class constructor.
+    """
+    def __init__(self, tests=()):
+        self._tests = []
+        self.addTests(tests)
+
+    def __repr__(self):
+        return "<%s tests=%s>" % (self.__class__, self._tests)
+
+    __str__ = __repr__
+
+    def countTestCases(self):
+        cases = 0
+        for test in self._tests:
+            cases = cases + test.countTestCases()
+        return cases
+
+    def addTest(self, test):
+        self._tests.append(test)
+
+    def addTests(self, tests):
+        for test in tests:
+            self.addTest(test)
+
+    def run(self, result):
+        return self(result)
+
+    def __call__(self, result):
+        for test in self._tests:
+            if result.shouldStop:
+                break
+            test(result)
+        return result
+
+    def debug(self):
+        for test in self._tests: test.debug()
+        
+
+
+class FunctionTestCase(TestCase):
+    """A test case that wraps a test function.
+
+    This is useful for slipping pre-existing test functions into the
+    PyUnit framework. Optionally, set-up and tidy-up functions can be
+    supplied. As with TestCase, the tidy-up ('tearDown') function will
+    always be called if the set-up ('setUp') function ran successfully.
+    """
+
+    def __init__(self, testFunc, setUp=None, tearDown=None,
+                 description=None):
+        TestCase.__init__(self)
+        self.__setUpFunc = setUp
+        self.__tearDownFunc = tearDown
+        self.__testFunc = testFunc
+        self.__description = description
+
+    def setUp(self):
+        if self.__setUpFunc is not None:
+            self.__setUpFunc()
+
+    def tearDown(self):
+        if self.__tearDownFunc is not None:
+            self.__tearDownFunc()
+
+    def runTest(self):
+        self.__testFunc()
+
+    def id(self):
+        return self.__testFunc.__name__
+
+    def __str__(self):
+        return "%s (%s)" % (self.__class__, self.__testFunc.__name__)
+
+    def __repr__(self):
+        return "<%s testFunc=%s>" % (self.__class__, self.__testFunc)
+
+    def shortDescription(self):
+        if self.__description is not None: return self.__description
+        doc = self.__testFunc.__doc__
+        return doc and string.strip(string.split(doc, "\n")[0]) or None
+
+
+
+##############################################################################
+# Convenience functions
+##############################################################################
+
+def getTestCaseNames(testCaseClass, prefix, sortUsing=cmp):
+    """Extracts all the names of functions in the given test case class
+       and its base classes that start with the given prefix. This is used
+       by makeSuite().
+    """
+    testFnNames = filter(lambda n,p=prefix: n[:len(p)] == p,
+                         dir(testCaseClass))
+    for baseclass in testCaseClass.__bases__:
+        testFnNames = testFnNames + \
+                      getTestCaseNames(baseclass, prefix, sortUsing=None)
+    if sortUsing:
+        testFnNames.sort(sortUsing)
+    return testFnNames
+
+
+def makeSuite(testCaseClass, prefix='test', sortUsing=cmp):
+    """Returns a TestSuite instance built from all of the test functions
+       in the given test case class whose names begin with the given
+       prefix. The cases are sorted by their function names
+       using the supplied comparison function, which defaults to 'cmp'.
+    """
+    cases = map(testCaseClass,
+                getTestCaseNames(testCaseClass, prefix, sortUsing))
+    return TestSuite(cases)
+
+
+def createTestInstance(name, module=None):
+    """Finds tests by their name, optionally only within the given module.
+
+    Return the newly-constructed test, ready to run. If the name contains a ':'
+    then the portion of the name after the colon is used to find a specific
+    test case within the test case class named before the colon.
+
+    Examples:
+     findTest('examples.listtests.suite')
+        -- returns result of calling 'suite'
+     findTest('examples.listtests.ListTestCase:checkAppend')
+        -- returns result of calling ListTestCase('checkAppend')
+     findTest('examples.listtests.ListTestCase:check-')
+        -- returns result of calling makeSuite(ListTestCase, prefix="check")
+    """
+          
+    spec = string.split(name, ':')
+    if len(spec) > 2: raise ValueError, "illegal test name: %s" % name
+    if len(spec) == 1:
+        testName = spec[0]
+        caseName = None
+    else:
+        testName, caseName = spec
+    parts = string.split(testName, '.')
+    if module is None:
+        if len(parts) < 2:
+            raise ValueError, "incomplete test name: %s" % name
+        constructor = __import__(string.join(parts[:-1],'.'))
+        parts = parts[1:]
+    else:
+        constructor = module
+    for part in parts:
+        constructor = getattr(constructor, part)
+    if not callable(constructor):
+        raise ValueError, "%s is not a callable object" % constructor
+    if caseName:
+        if caseName[-1] == '-':
+            prefix = caseName[:-1]
+            if not prefix:
+                raise ValueError, "prefix too short: %s" % name
+            test = makeSuite(constructor, prefix=prefix)
+        else:
+            test = constructor(caseName)
+    else:
+        test = constructor()
+    if not hasattr(test,"countTestCases"):
+        raise TypeError, \
+              "object %s found with spec %s is not a test" % (test, name)
+    return test
+
+
+##############################################################################
+# Text UI
+##############################################################################
+
+class _WritelnDecorator:
+    """Used to decorate file-like objects with a handy 'writeln' method"""
+    def __init__(self,stream):
+        self.stream = stream
+        if _isJPython:
+            import java.lang.System
+            self.linesep = java.lang.System.getProperty("line.separator")
+        else:
+            self.linesep = os.linesep
+
+    def __getattr__(self, attr):
+        return getattr(self.stream,attr)
+
+    def writeln(self, *args):
+        if args: apply(self.write, args)
+        self.write(self.linesep)
+
+        
+class _JUnitTextTestResult(TestResult):
+    """A test result class that can print formatted text results to a stream.
+
+    Used by JUnitTextTestRunner.
+    """
+    def __init__(self, stream):
+        self.stream = stream
+        TestResult.__init__(self)
+
+    def addError(self, test, error):
+        TestResult.addError(self,test,error)
+        self.stream.write('E')
+        self.stream.flush()
+        if error[0] is KeyboardInterrupt:
+            self.shouldStop = 1
+ 
+    def addFailure(self, test, error):
+        TestResult.addFailure(self,test,error)
+        self.stream.write('F')
+        self.stream.flush()
+ 
+    def startTest(self, test):
+        TestResult.startTest(self,test)
+        self.stream.write('.')
+        self.stream.flush()
+
+    def printNumberedErrors(self,errFlavour,errors):
+        if not errors: return
+        if len(errors) == 1:
+            self.stream.writeln("There was 1 %s:" % errFlavour)
+        else:
+            self.stream.writeln("There were %i %ss:" %
+                                (len(errors), errFlavour))
+        i = 1
+        for test,error in errors:
+            errString = string.join(apply(traceback.format_exception,error),"")
+            self.stream.writeln("%i) %s" % (i, test))
+            self.stream.writeln(errString)
+            i = i + 1
+ 
+    def printErrors(self):
+        self.printNumberedErrors("error",self.errors)
+
+    def printFailures(self):
+        self.printNumberedErrors("failure",self.failures)
+
+    def printHeader(self):
+        self.stream.writeln()
+        if self.wasSuccessful():
+            self.stream.writeln("OK (%i tests)" % self.testsRun)
+        else:
+            self.stream.writeln("!!!FAILURES!!!")
+            self.stream.writeln("Test Results")
+            self.stream.writeln()
+            self.stream.writeln("Run: %i ; Failures: %i ; Errors: %i" %
+                                (self.testsRun, len(self.failures),
+                                 len(self.errors)))
+            
+    def printResult(self):
+        self.printHeader()
+        self.printErrors()
+        self.printFailures()
+
+
+class JUnitTextTestRunner:
+    """A test runner class that displays results in textual form.
+    
+    The display format approximates that of JUnit's 'textui' test runner.
+    This test runner may be removed in a future version of PyUnit.
+    """
+    def __init__(self, stream=sys.stderr):
+        self.stream = _WritelnDecorator(stream)
+
+    def run(self, test):
+        "Run the given test case or test suite."
+        result = _JUnitTextTestResult(self.stream)
+        startTime = time.time()
+        test(result)
+        stopTime = time.time()
+        self.stream.writeln()
+        self.stream.writeln("Time: %.3fs" % float(stopTime - startTime))
+        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)