Method loadTestsFromName

Lib/unittest/loader.py:120–200

Return a suite of all test cases given a string specifier. The name may resolve either to a module, a test case class, a test method within a test case class, or a callable object which returns a TestCase or TestSuite instance. The method optionally resolves the nam

(self, name, module=None)

        return tests

    def loadTestsFromName(self, name, module=None):
        """Return a suite of all test cases given a string specifier.

        The name may resolve either to a module, a test case class, a
        test method within a test case class, or a callable object which
        returns a TestCase or TestSuite instance.

        The method optionally resolves the names relative to a given module.
        """
        parts = name.split('.')
        error_case, error_message = None, None
        if module is None:
            parts_copy = parts[:]
            while parts_copy:
                try:
                    module_name = '.'.join(parts_copy)
                    module = __import__(module_name)
                    break
                except ImportError:
                    next_attribute = parts_copy.pop()
                    # Last error so we can give it to the user if needed.
                    error_case, error_message = _make_failed_import_test(
                        next_attribute, self.suiteClass)
                    if not parts_copy:
                        # Even the top level import failed: report that error.
                        self.errors.append(error_message)
                        return error_case
            parts = parts[1:]
        obj = module
        for part in parts:
            try:
                parent, obj = obj, getattr(obj, part)
            except AttributeError as e:
                # We can't traverse some part of the name.
                if (getattr(obj, '__path__', None) is not None
                    and error_case is not None):
                    # This is a package (no __path__ per importlib docs), and we
                    # encountered an error importing something. We cannot tell
                    # the difference between package.WrongNameTestClass and
                    # package.wrong_module_name so we just report the
                    # ImportError - it is more informative.
                    self.errors.append(error_message)
                    return error_case
                else:
                    # Otherwise, we signal that an AttributeError has occurred.
                    error_case, error_message = _make_failed_test(
                        part, e, self.suiteClass,
                        'Failed to access attribute:\n%s' % (
                            traceback.format_exc(),))
                    self.errors.append(error_message)
                    return error_case

        if isinstance(obj, types.ModuleType):
            return self.loadTestsFromModule(obj)
        elif (
            isinstance(obj, type)
            and issubclass(obj, case.TestCase)
            and obj not in (case.TestCase, case.FunctionTestCase)