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How to use _EmulateWith method in autotest

Best Python code snippet using autotest_python
unittest.py
Source:unittest.py
...72            self.obj = obj73        def __lt__(self, other):74            return mycmp(self.obj, other.obj) == -175    return K76def _EmulateWith(context, func):77    context.__enter__()78    try:79        func()80    except:81        if not context.__exit__(sys.exc_type, sys.exc_value, sys.exc_traceback):82            raise83    else:84        context.__exit__(None, None, None)85##############################################################################86# Test framework core87##############################################################################88def _strclass(cls):89    return "%s.%s" % (cls.__module__, cls.__name__)90class SkipTest(Exception):91    """92    Raise this exception in a test to skip it.93    Usually you can use TestResult.skip() or one of the skipping decorators94    instead of raising this directly.95    """96    pass97class _ExpectedFailure(Exception):98    """99    Raise this when a test is expected to fail.100    This is an implementation detail.101    """102    def __init__(self, exc_info):103        super(_ExpectedFailure, self).__init__()104        self.exc_info = exc_info105class _UnexpectedSuccess(Exception):106    """107    The test was supposed to fail, but it didn't!108    """109    pass110def _id(obj):111    return obj112def skip(reason):113    """114    Unconditionally skip a test.115    """116    def decorator(test_item):117        if isinstance(test_item, type) and issubclass(test_item, TestCase):118            test_item.__unittest_skip__ = True119            test_item.__unittest_skip_why__ = reason120            return test_item121        @functools.wraps(test_item)122        def skip_wrapper(*args, **kwargs):123            raise SkipTest(reason)124        return skip_wrapper125    return decorator126def skipIf(condition, reason):127    """128    Skip a test if the condition is true.129    """130    if condition:131        return skip(reason)132    return _id133def skipUnless(condition, reason):134    """135    Skip a test unless the condition is true.136    """137    if not condition:138        return skip(reason)139    return _id140def expectedFailure(func):141    @functools.wraps(func)142    def wrapper(*args, **kwargs):143        try:144            func(*args, **kwargs)145        except Exception:146            raise _ExpectedFailure(sys.exc_info())147        raise _UnexpectedSuccess148    return wrapper149__unittest = 1150class TestResult(object):151    """Holder for test result information.152    Test results are automatically managed by the TestCase and TestSuite153    classes, and do not need to be explicitly manipulated by writers of tests.154    Each instance holds the total number of tests run, and collections of155    failures and errors that occurred among those test runs. The collections156    contain tuples of (testcase, exceptioninfo), where exceptioninfo is the157    formatted traceback of the error that occurred.158    """159    def __init__(self):160        self.failures = []161        self.errors = []162        self.testsRun = 0163        self.skipped = []164        self.expectedFailures = []165        self.unexpectedSuccesses = []166        self.shouldStop = False167    def startTest(self, test):168        "Called when the given test is about to be run"169        self.testsRun = self.testsRun + 1170    def stopTest(self, test):171        "Called when the given test has been run"172        pass173    def addError(self, test, err):174        """Called when an error has occurred. 'err' is a tuple of values as175        returned by sys.exc_info().176        """177        self.errors.append((test, self._exc_info_to_string(err, test)))178    def addFailure(self, test, err):179        """Called when an error has occurred. 'err' is a tuple of values as180        returned by sys.exc_info()."""181        self.failures.append((test, self._exc_info_to_string(err, test)))182    def addSuccess(self, test):183        "Called when a test has completed successfully"184        pass185    def addSkip(self, test, reason):186        """Called when a test is skipped."""187        self.skipped.append((test, reason))188    def addExpectedFailure(self, test, err):189        """Called when an expected failure/error occured."""190        self.expectedFailures.append(191            (test, self._exc_info_to_string(err, test)))192    def addUnexpectedSuccess(self, test):193        """Called when a test was expected to fail, but succeed."""194        self.unexpectedSuccesses.append(test)195    def wasSuccessful(self):196        "Tells whether or not this result was a success"197        return len(self.failures) == len(self.errors) == 0198    def stop(self):199        "Indicates that the tests should be aborted"200        self.shouldStop = True201    def _exc_info_to_string(self, err, test):202        """Converts a sys.exc_info()-style tuple of values into a string."""203        exctype, value, tb = err204        # Skip test runner traceback levels205        while tb and self._is_relevant_tb_level(tb):206            tb = tb.tb_next207        if exctype is test.failureException:208            # Skip assert*() traceback levels209            length = self._count_relevant_tb_levels(tb)210            return ''.join(traceback.format_exception(exctype, value, tb, length))211        return ''.join(traceback.format_exception(exctype, value, tb))212    def _is_relevant_tb_level(self, tb):213        return '__unittest' in tb.tb_frame.f_globals214    def _count_relevant_tb_levels(self, tb):215        length = 0216        while tb and not self._is_relevant_tb_level(tb):217            length += 1218            tb = tb.tb_next219        return length220    def __repr__(self):221        return "<%s run=%i errors=%i failures=%i>" % \222               (_strclass(self.__class__), self.testsRun, len(self.errors),223                len(self.failures))224class _AssertRaisesContext(object):225    """A context manager used to implement TestCase.assertRaises* methods."""226    def __init__(self, expected, test_case, expected_regexp=None):227        self.expected = expected228        self.failureException = test_case.failureException229        self.expected_regex = expected_regexp230    def __enter__(self):231        pass232    def __exit__(self, exc_type, exc_value, tb):233        if exc_type is None:234            try:235                exc_name = self.expected.__name__236            except AttributeError:237                exc_name = str(self.expected)238            raise self.failureException(239                "%s not raised" % exc_name)240        if not issubclass(exc_type, self.expected):241            # let unexpected exceptions pass through242            return False243        if self.expected_regex is None:244            return True245        expected_regexp = self.expected_regex246        if isinstance(expected_regexp, basestring):247            expected_regexp = re.compile(expected_regexp)248        if not expected_regexp.search(str(exc_value)):249            raise self.failureException('"%s" does not match "%s"' %250                     (expected_regexp.pattern, str(exc_value)))251        return True252class _AssertWrapper(object):253    """Wrap entries in the _type_equality_funcs registry to make them deep254    copyable."""255    def __init__(self, function):256        self.function = function257    def __deepcopy__(self, memo):258        memo[id(self)] = self259class TestCase(object):260    """A class whose instances are single test cases.261    By default, the test code itself should be placed in a method named262    'runTest'.263    If the fixture may be used for many test cases, create as264    many test methods as are needed. When instantiating such a TestCase265    subclass, specify in the constructor arguments the name of the test method266    that the instance is to execute.267    Test authors should subclass TestCase for their own tests. Construction268    and deconstruction of the test's environment ('fixture') can be269    implemented by overriding the 'setUp' and 'tearDown' methods respectively.270    If it is necessary to override the __init__ method, the base class271    __init__ method must always be called. It is important that subclasses272    should not change the signature of their __init__ method, since instances273    of the classes are instantiated automatically by parts of the framework274    in order to be run.275    """276    # This attribute determines which exception will be raised when277    # the instance's assertion methods fail; test methods raising this278    # exception will be deemed to have 'failed' rather than 'errored'279    failureException = AssertionError280    # This attribute determines whether long messages (including repr of281    # objects used in assert methods) will be printed on failure in *addition*282    # to any explicit message passed.283    longMessage = False284    def __init__(self, methodName='runTest'):285        """Create an instance of the class that will use the named test286           method when executed. Raises a ValueError if the instance does287           not have a method with the specified name.288        """289        self._testMethodName = methodName290        try:291            testMethod = getattr(self, methodName)292        except AttributeError:293            raise ValueError("no such test method in %s: %s" % \294                  (self.__class__, methodName))295        self._testMethodDoc = testMethod.__doc__296        # Map types to custom assertEqual functions that will compare297        # instances of said type in more detail to generate a more useful298        # error message.299        self._type_equality_funcs = {}300        self.addTypeEqualityFunc(dict, self.assertDictEqual)301        self.addTypeEqualityFunc(list, self.assertListEqual)302        self.addTypeEqualityFunc(tuple, self.assertTupleEqual)303        self.addTypeEqualityFunc(set, self.assertSetEqual)304        self.addTypeEqualityFunc(frozenset, self.assertSetEqual)305    def addTypeEqualityFunc(self, typeobj, function):306        """Add a type specific assertEqual style function to compare a type.307        This method is for use by TestCase subclasses that need to register308        their own type equality functions to provide nicer error messages.309        Args:310            typeobj: The data type to call this function on when both values311                    are of the same type in assertEqual().312            function: The callable taking two arguments and an optional313                    msg= argument that raises self.failureException with a314                    useful error message when the two arguments are not equal.315        """316        self._type_equality_funcs[typeobj] = _AssertWrapper(function)317    def setUp(self):318        "Hook method for setting up the test fixture before exercising it."319        pass320    def tearDown(self):321        "Hook method for deconstructing the test fixture after testing it."322        pass323    def countTestCases(self):324        return 1325    def defaultTestResult(self):326        return TestResult()327    def shortDescription(self):328        """Returns both the test method name and first line of its docstring.329        If no docstring is given, only returns the method name.330        This method overrides unittest.TestCase.shortDescription(), which331        only returns the first line of the docstring, obscuring the name332        of the test upon failure.333        """334        desc = str(self)335        doc_first_line = None336        if self._testMethodDoc:337            doc_first_line = self._testMethodDoc.split("\n")[0].strip()338        if doc_first_line:339            desc = '\n'.join((desc, doc_first_line))340        return desc341    def id(self):342        return "%s.%s" % (_strclass(self.__class__), self._testMethodName)343    def __eq__(self, other):344        if type(self) is not type(other):345            return NotImplemented346        return self._testMethodName == other._testMethodName347    def __ne__(self, other):348        return not self == other349    def __hash__(self):350        return hash((type(self), self._testMethodName))351    def __str__(self):352        return "%s (%s)" % (self._testMethodName, _strclass(self.__class__))353    def __repr__(self):354        return "<%s testMethod=%s>" % \355               (_strclass(self.__class__), self._testMethodName)356    def run(self, result=None):357        if result is None:358            result = self.defaultTestResult()359        result.startTest(self)360        testMethod = getattr(self, self._testMethodName)361        try:362            try:363                self.setUp()364            except SkipTest, e:365                result.addSkip(self, str(e))366                return367            except Exception:368                result.addError(self, sys.exc_info())369                return370            success = False371            try:372                testMethod()373            except self.failureException:374                result.addFailure(self, sys.exc_info())375            except _ExpectedFailure, e:376                result.addExpectedFailure(self, e.exc_info)377            except _UnexpectedSuccess:378                result.addUnexpectedSuccess(self)379            except SkipTest, e:380                result.addSkip(self, str(e))381            except Exception:382                result.addError(self, sys.exc_info())383            else:384                success = True385            try:386                self.tearDown()387            except Exception:388                result.addError(self, sys.exc_info())389                success = False390            if success:391                result.addSuccess(self)392        finally:393            result.stopTest(self)394    def __call__(self, *args, **kwds):395        return self.run(*args, **kwds)396    def debug(self):397        """Run the test without collecting errors in a TestResult"""398        self.setUp()399        getattr(self, self._testMethodName)()400        self.tearDown()401    def skipTest(self, reason):402        """Skip this test."""403        raise SkipTest(reason)404    def fail(self, msg=None):405        """Fail immediately, with the given message."""406        raise self.failureException(msg)407    def assertFalse(self, expr, msg=None):408        "Fail the test if the expression is true."409        if expr:410            msg = self._formatMessage(msg, "%r is not False" % expr)411            raise self.failureException(msg)412    def assertTrue(self, expr, msg=None):413        """Fail the test unless the expression is true."""414        if not expr:415            msg = self._formatMessage(msg, "%r is not True" % expr)416            raise self.failureException(msg)417    def _formatMessage(self, msg, standardMsg):418        """Honour the longMessage attribute when generating failure messages.419        If longMessage is False this means:420        * Use only an explicit message if it is provided421        * Otherwise use the standard message for the assert422        If longMessage is True:423        * Use the standard message424        * If an explicit message is provided, plus ' : ' and the explicit message425        """426        if not self.longMessage:427            return msg or standardMsg428        if msg is None:429            return standardMsg430        return standardMsg + ' : ' + msg431    def assertRaises(self, excClass, callableObj=None, *args, **kwargs):432        """Fail unless an exception of class excClass is thrown433           by callableObj when invoked with arguments args and keyword434           arguments kwargs. If a different type of exception is435           thrown, it will not be caught, and the test case will be436           deemed to have suffered an error, exactly as for an437           unexpected exception.438           If called with callableObj omitted or None, will return a439           context object used like this::440                with self.assertRaises(some_error_class):441                    do_something()442        """443        context = _AssertRaisesContext(excClass, self)444        if callableObj is None:445            return context446        # XXX (garrcoop): `with context' isn't supported lexigram with 2.4/2.5,447        # even though PEP 343 (sort of) implies that based on the publishing448        # date. There may be another PEP which changed the syntax...449        _EmulateWith(context, lambda: callableObj(*args, **kwargs))450    def _getAssertEqualityFunc(self, first, second):451        """Get a detailed comparison function for the types of the two args.452        Returns: A callable accepting (first, second, msg=None) that will453        raise a failure exception if first != second with a useful human454        readable error message for those types.455        """456        #457        # NOTE(gregory.p.smith): I considered isinstance(first, type(second))458        # and vice versa.  I opted for the conservative approach in case459        # subclasses are not intended to be compared in detail to their super460        # class instances using a type equality func.  This means testing461        # subtypes won't automagically use the detailed comparison.  Callers462        # should use their type specific assertSpamEqual method to compare463        # subclasses if the detailed comparison is desired and appropriate.464        # See the discussion in http://bugs.python.org/issue2578.465        #466        if type(first) is type(second):467            asserter = self._type_equality_funcs.get(type(first))468            if asserter is not None:469                return asserter.function470        return self._baseAssertEqual471    def _baseAssertEqual(self, first, second, msg=None):472        """The default assertEqual implementation, not type specific."""473        if not first == second:474            standardMsg = '%r != %r' % (first, second)475            msg = self._formatMessage(msg, standardMsg)476            raise self.failureException(msg)477    def assertEqual(self, first, second, msg=None):478        """Fail if the two objects are unequal as determined by the '=='479           operator.480        """481        assertion_func = self._getAssertEqualityFunc(first, second)482        assertion_func(first, second, msg=msg)483    def assertNotEqual(self, first, second, msg=None):484        """Fail if the two objects are equal as determined by the '=='485           operator.486        """487        if not first != second:488            msg = self._formatMessage(msg, '%r == %r' % (first, second))489            raise self.failureException(msg)490    def assertAlmostEqual(self, first, second, places=7, msg=None):491        """Fail if the two objects are unequal as determined by their492           difference rounded to the given number of decimal places493           (default 7) and comparing to zero.494           Note that decimal places (from zero) are usually not the same495           as significant digits (measured from the most signficant digit).496        """497        if round(abs(second-first), places) != 0:498            standardMsg = '%r != %r within %r places' % (first, second, places)499            msg = self._formatMessage(msg, standardMsg)500            raise self.failureException(msg)501    def assertNotAlmostEqual(self, first, second, places=7, msg=None):502        """Fail if the two objects are equal as determined by their503           difference rounded to the given number of decimal places504           (default 7) and comparing to zero.505           Note that decimal places (from zero) are usually not the same506           as significant digits (measured from the most signficant digit).507        """508        if round(abs(second-first), places) == 0:509            standardMsg = '%r == %r within %r places' % (first, second, places)510            msg = self._formatMessage(msg, standardMsg)511            raise self.failureException(msg)512    # Synonyms for assertion methods513    # The plurals are undocumented.  Keep them that way to discourage use.514    # Do not add more.  Do not remove.515    # Going through a deprecation cycle on these would annoy many people.516    assertEquals = assertEqual517    assertNotEquals = assertNotEqual518    assertAlmostEquals = assertAlmostEqual519    assertNotAlmostEquals = assertNotAlmostEqual520    assert_ = assertTrue521    # These fail* assertion method names are pending deprecation and will522    # be a DeprecationWarning in 3.2; http://bugs.python.org/issue2578523    def _deprecate(original_func):524        def deprecated_func(*args, **kwargs):525            warnings.warn(526                'Please use %s instead.' % original_func.__name__,527                PendingDeprecationWarning, 2)528            return original_func(*args, **kwargs)529        return deprecated_func530    failUnlessEqual = _deprecate(assertEqual)531    failIfEqual = _deprecate(assertNotEqual)532    failUnlessAlmostEqual = _deprecate(assertAlmostEqual)533    failIfAlmostEqual = _deprecate(assertNotAlmostEqual)534    failUnless = _deprecate(assertTrue)535    failUnlessRaises = _deprecate(assertRaises)536    failIf = _deprecate(assertFalse)537    def assertSequenceEqual(self, seq1, seq2, msg=None, seq_type=None):538        """An equality assertion for ordered sequences (like lists and tuples).539        For the purposes of this function, a valid orderd sequence type is one540        which can be indexed, has a length, and has an equality operator.541        Args:542            seq1: The first sequence to compare.543            seq2: The second sequence to compare.544            seq_type: The expected datatype of the sequences, or None if no545                    datatype should be enforced.546            msg: Optional message to use on failure instead of a list of547                    differences.548        """549        if seq_type != None:550            seq_type_name = seq_type.__name__551            if not isinstance(seq1, seq_type):552                raise self.failureException('First sequence is not a %s: %r'553                                            % (seq_type_name, seq1))554            if not isinstance(seq2, seq_type):555                raise self.failureException('Second sequence is not a %s: %r'556                                            % (seq_type_name, seq2))557        else:558            seq_type_name = "sequence"559        differing = None560        try:561            len1 = len(seq1)562        except (TypeError, NotImplementedError):563            differing = 'First %s has no length.    Non-sequence?' % (564                    seq_type_name)565        if differing is None:566            try:567                len2 = len(seq2)568            except (TypeError, NotImplementedError):569                differing = 'Second %s has no length.    Non-sequence?' % (570                        seq_type_name)571        if differing is None:572            if seq1 == seq2:573                return574            for i in xrange(min(len1, len2)):575                try:576                    item1 = seq1[i]577                except (TypeError, IndexError, NotImplementedError):578                    differing = ('Unable to index element %d of first %s\n' %579                                 (i, seq_type_name))580                    break581                try:582                    item2 = seq2[i]583                except (TypeError, IndexError, NotImplementedError):584                    differing = ('Unable to index element %d of second %s\n' %585                                 (i, seq_type_name))586                    break587                if item1 != item2:588                    differing = ('First differing element %d:\n%s\n%s\n' %589                                 (i, item1, item2))590                    break591            else:592                if (len1 == len2 and seq_type is None and593                    type(seq1) != type(seq2)):594                    # The sequences are the same, but have differing types.595                    return596                # A catch-all message for handling arbitrary user-defined597                # sequences.598                differing = '%ss differ:\n' % seq_type_name.capitalize()599                if len1 > len2:600                    differing = ('First %s contains %d additional '601                                 'elements.\n' % (seq_type_name, len1 - len2))602                    try:603                        differing += ('First extra element %d:\n%s\n' %604                                      (len2, seq1[len2]))605                    except (TypeError, IndexError, NotImplementedError):606                        differing += ('Unable to index element %d '607                                      'of first %s\n' % (len2, seq_type_name))608                elif len1 < len2:609                    differing = ('Second %s contains %d additional '610                                 'elements.\n' % (seq_type_name, len2 - len1))611                    try:612                        differing += ('First extra element %d:\n%s\n' %613                                      (len1, seq2[len1]))614                    except (TypeError, IndexError, NotImplementedError):615                        differing += ('Unable to index element %d '616                                      'of second %s\n' % (len1, seq_type_name))617        standardMsg = differing + '\n'.join(difflib.ndiff(pprint.pformat(seq1).splitlines(),618                                            pprint.pformat(seq2).splitlines()))619        msg = self._formatMessage(msg, standardMsg)620        self.fail(msg)621    def assertListEqual(self, list1, list2, msg=None):622        """A list-specific equality assertion.623        Args:624            list1: The first list to compare.625            list2: The second list to compare.626            msg: Optional message to use on failure instead of a list of627                    differences.628        """629        self.assertSequenceEqual(list1, list2, msg, seq_type=list)630    def assertTupleEqual(self, tuple1, tuple2, msg=None):631        """A tuple-specific equality assertion.632        Args:633            tuple1: The first tuple to compare.634            tuple2: The second tuple to compare.635            msg: Optional message to use on failure instead of a list of636                    differences.637        """638        self.assertSequenceEqual(tuple1, tuple2, msg, seq_type=tuple)639    def assertSetEqual(self, set1, set2, msg=None):640        """A set-specific equality assertion.641        Args:642            set1: The first set to compare.643            set2: The second set to compare.644            msg: Optional message to use on failure instead of a list of645                    differences.646        For more general containership equality, assertSameElements will work647        with things other than sets.    This uses ducktyping to support648        different types of sets, and is optimized for sets specifically649        (parameters must support a difference method).650        """651        try:652            difference1 = set1.difference(set2)653        except TypeError, e:654            self.fail('invalid type when attempting set difference: %s' % e)655        except AttributeError, e:656            self.fail('first argument does not support set difference: %s' % e)657        try:658            difference2 = set2.difference(set1)659        except TypeError, e:660            self.fail('invalid type when attempting set difference: %s' % e)661        except AttributeError, e:662            self.fail('second argument does not support set difference: %s' % e)663        if not (difference1 or difference2):664            return665        lines = []666        if difference1:667            lines.append('Items in the first set but not the second:')668            for item in difference1:669                lines.append(repr(item))670        if difference2:671            lines.append('Items in the second set but not the first:')672            for item in difference2:673                lines.append(repr(item))674        standardMsg = '\n'.join(lines)675        self.fail(self._formatMessage(msg, standardMsg))676    def assertIn(self, member, container, msg=None):677        """Just like self.assertTrue(a in b), but with a nicer default message."""678        if member not in container:679            standardMsg = '%r not found in %r' % (member, container)680            self.fail(self._formatMessage(msg, standardMsg))681    def assertNotIn(self, member, container, msg=None):682        """Just like self.assertTrue(a not in b), but with a nicer default message."""683        if member in container:684            standardMsg = '%r unexpectedly found in %r' % (member, container)685            self.fail(self._formatMessage(msg, standardMsg))686    def assertIs(self, expr1, expr2, msg=None):687        """Just like self.assertTrue(a is b), but with a nicer default message."""688        if expr1 is not expr2:689            standardMsg = '%r is not %r' % (expr1, expr2)690            self.fail(self._formatMessage(msg, standardMsg))691    def assertIsNot(self, expr1, expr2, msg=None):692        """Just like self.assertTrue(a is not b), but with a nicer default message."""693        if expr1 is expr2:694            standardMsg = 'unexpectedly identical: %r' % (expr1,)695            self.fail(self._formatMessage(msg, standardMsg))696    def assertDictEqual(self, d1, d2, msg=None):697        self.assert_(isinstance(d1, dict), 'First argument is not a dictionary')698        self.assert_(isinstance(d2, dict), 'Second argument is not a dictionary')699        if d1 != d2:700            standardMsg = ('\n' + '\n'.join(difflib.ndiff(701                           pprint.pformat(d1).splitlines(),702                           pprint.pformat(d2).splitlines())))703            self.fail(self._formatMessage(msg, standardMsg))704    def assertDictContainsSubset(self, expected, actual, msg=None):705        """Checks whether actual is a superset of expected."""706        missing = []707        mismatched = []708        for key, value in expected.iteritems():709            if key not in actual:710                missing.append(key)711            elif value != actual[key]:712                mismatched.append('%s, expected: %s, actual: %s' % (key, value,                                                                                                       actual[key]))713        if not (missing or mismatched):714            return715        standardMsg = ''716        if missing:717            standardMsg = 'Missing: %r' % ','.join(missing)718        if mismatched:719            if standardMsg:720                standardMsg += '; '721            standardMsg += 'Mismatched values: %s' % ','.join(mismatched)722        self.fail(self._formatMessage(msg, standardMsg))723    def assertSameElements(self, expected_seq, actual_seq, msg=None):724        """An unordered sequence specific comparison.725        Raises with an error message listing which elements of expected_seq726        are missing from actual_seq and vice versa if any.727        """728        try:729            expected = set(expected_seq)730            actual = set(actual_seq)731            missing = list(expected.difference(actual))732            unexpected = list(actual.difference(expected))733            missing.sort()734            unexpected.sort()735        except TypeError:736            # Fall back to slower list-compare if any of the objects are737            # not hashable.738            expected = list(expected_seq)739            actual = list(actual_seq)740            expected.sort()741            actual.sort()742            missing, unexpected = _SortedListDifference(expected, actual)743        errors = []744        if missing:745            errors.append('Expected, but missing:\n    %r' % missing)746        if unexpected:747            errors.append('Unexpected, but present:\n    %r' % unexpected)748        if errors:749            standardMsg = '\n'.join(errors)750            self.fail(self._formatMessage(msg, standardMsg))751    def assertMultiLineEqual(self, first, second, msg=None):752        """Assert that two multi-line strings are equal."""753        self.assert_(isinstance(first, basestring), (754                'First argument is not a string'))755        self.assert_(isinstance(second, basestring), (756                'Second argument is not a string'))757        if first != second:758            standardMsg = '\n' + ''.join(difflib.ndiff(first.splitlines(True), second.splitlines(True)))759            self.fail(self._formatMessage(msg, standardMsg))760    def assertLess(self, a, b, msg=None):761        """Just like self.assertTrue(a < b), but with a nicer default message."""762        if not a < b:763            standardMsg = '%r not less than %r' % (a, b)764            self.fail(self._formatMessage(msg, standardMsg))765    def assertLessEqual(self, a, b, msg=None):766        """Just like self.assertTrue(a <= b), but with a nicer default message."""767        if not a <= b:768            standardMsg = '%r not less than or equal to %r' % (a, b)769            self.fail(self._formatMessage(msg, standardMsg))770    def assertGreater(self, a, b, msg=None):771        """Just like self.assertTrue(a > b), but with a nicer default message."""772        if not a > b:773            standardMsg = '%r not greater than %r' % (a, b)774            self.fail(self._formatMessage(msg, standardMsg))775    def assertGreaterEqual(self, a, b, msg=None):776        """Just like self.assertTrue(a >= b), but with a nicer default message."""777        if not a >= b:778            standardMsg = '%r not greater than or equal to %r' % (a, b)779            self.fail(self._formatMessage(msg, standardMsg))780    def assertIsNone(self, obj, msg=None):781        """Same as self.assertTrue(obj is None), with a nicer default message."""782        if obj is not None:783            standardMsg = '%r is not None' % obj784            self.fail(self._formatMessage(msg, standardMsg))785    def assertIsNotNone(self, obj, msg=None):786        """Included for symmetry with assertIsNone."""787        if obj is None:788            standardMsg = 'unexpectedly None'789            self.fail(self._formatMessage(msg, standardMsg))790    def assertRaisesRegexp(self, expected_exception, expected_regexp,791                           callable_obj=None, *args, **kwargs):792        """Asserts that the message in a raised exception matches a regexp.793        Args:794            expected_exception: Exception class expected to be raised.795            expected_regexp: Regexp (re pattern object or string) expected796                    to be found in error message.797            callable_obj: Function to be called.798            args: Extra args.799            kwargs: Extra kwargs.800        """801        context = _AssertRaisesContext(expected_exception, self, expected_regexp)802        if callable_obj is None:803            return context804        # XXX (garrcoop): See comment above about `with context'.805        _EmulateWith(context, lambda: callable_obj(*args, **kwargs))806    def assertRegexpMatches(self, text, expected_regex, msg=None):807        if isinstance(expected_regex, basestring):808            expected_regex = re.compile(expected_regex)809        if not expected_regex.search(text):810            msg = msg or "Regexp didn't match"811            msg = '%s: %r not found in %r' % (msg, expected_regex.pattern, text)812            raise self.failureException(msg)813def _SortedListDifference(expected, actual):814    """Finds elements in only one or the other of two, sorted input lists.815    Returns a two-element tuple of lists.    The first list contains those816    elements in the "expected" list but not in the "actual" list, and the817    second contains those elements in the "actual" list but not in the818    "expected" list.    Duplicate elements in either input list are ignored.819    """...
Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.