Method run

Lib/unittest/case.py:632–695

(self, result=None)

        function(*args, **kwargs)

    def run(self, result=None):
        if result is None:
            result = self.defaultTestResult()
            startTestRun = getattr(result, 'startTestRun', None)
            stopTestRun = getattr(result, 'stopTestRun', None)
            if startTestRun is not None:
                startTestRun()
        else:
            stopTestRun = None

        result.startTest(self)
        try:
            testMethod = getattr(self, self._testMethodName)
            if (getattr(self.__class__, "__unittest_skip__", False) or
                getattr(testMethod, "__unittest_skip__", False)):
                # If the class or method was skipped.
                skip_why = (getattr(self.__class__, '__unittest_skip_why__', '')
                            or getattr(testMethod, '__unittest_skip_why__', ''))
                _addSkip(result, self, skip_why)
                return result

            expecting_failure = (
                getattr(self, "__unittest_expecting_failure__", False) or
                getattr(testMethod, "__unittest_expecting_failure__", False)
            )
            outcome = _Outcome(result)
            start_time = time.perf_counter()
            try:
                self._outcome = outcome

                with outcome.testPartExecutor(self):
                    self._callSetUp()
                if outcome.success:
                    outcome.expecting_failure = expecting_failure
                    with outcome.testPartExecutor(self):
                        self._callTestMethod(testMethod)
                    outcome.expecting_failure = False
                    with outcome.testPartExecutor(self):
                        self._callTearDown()
                self.doCleanups()
                self._addDuration(result, (time.perf_counter() - start_time))

                if outcome.success:
                    if expecting_failure:
                        if outcome.expectedFailure:
                            self._addExpectedFailure(result, outcome.expectedFailure)
                        else:
                            self._addUnexpectedSuccess(result)
                    else:
                        result.addSuccess(self)
                return result
            finally:
                # explicitly break reference cycle:
                # outcome.expectedFailure -> frame -> outcome -> outcome.expectedFailure
                outcome.expectedFailure = None
                outcome = None

                # clear the outcome, no more needed