base_test_mixins.py

        """
        try:
            storage = self.get_listed_storage_from_response(response)
            print("\n-----------message start (%i total)-------------"
                  % len(storage))
            for m in storage:
                print(m.message)
            print("-----------message end-------------\n")
        except KeyError:
            print("\n-------no message----------")


class SubprocessRunpyContainerMixin(object):
    """
    This mixin is used to fake a runpy container, only needed when
    the TestCase include test(s) for code questions
    """
    @classmethod
    def setUpClass(cls):  # noqa
        if six.PY2:
            from unittest import SkipTest
            raise SkipTest("In process fake container is configured for "
                           "PY3 only, since currently runpy docker only "
                           "provide PY3 envrionment")

        super(SubprocessRunpyContainerMixin, cls).setUpClass()

        python_executable = os.getenv("PY_EXE")

        if not python_executable:
            python_executable = sys.executable

        import subprocess
        args = [python_executable,
                os.path.abspath(
                    os.path.join(
                        os.path.dirname(__file__), os.pardir,
                        "docker-image-run-py", "runpy")),
                ]
        cls.faked_container_process = subprocess.Popen(
            args,
            stdout=subprocess.DEVNULL,

            # because runpy prints to stderr
            stderr=subprocess.DEVNULL
        )

    def setUp(self):
        super(SubprocessRunpyContainerMixin, self).setUp()
        self.faked_container_patch = mock.patch(
            "course.page.code.SPAWN_CONTAINERS_FOR_RUNPY", False)
        self.faked_container_patch.start()
        self.addCleanup(self.faked_container_patch.stop)

    @classmethod
    def tearDownClass(cls):  # noqa
        super(SubprocessRunpyContainerMixin, cls).tearDownClass()

        from course.page.code import SPAWN_CONTAINERS_FOR_RUNPY
        # Make sure SPAWN_CONTAINERS_FOR_RUNPY is reset to True
        assert SPAWN_CONTAINERS_FOR_RUNPY
        if sys.platform.startswith("win"):
            # Without these lines, tests on Appveyor hanged when all tests
            # finished.
            # However, On nix platforms, these lines resulted in test
            # failure when there were more than one TestCases which were using
            # this mixin. So we don't kill the subprocess, and it won't bring
            # bad side effects to remainder tests.
            cls.faked_container_process.kill()


def improperly_configured_cache_patch():
    # can be used as context manager or decorator
    if six.PY3:
        built_in_import_path = "builtins.__import__"
        import builtins  # noqa
    else:
        built_in_import_path = "__builtin__.__import__"
        import __builtin__ as builtins  # noqa
    built_in_import = builtins.__import__

    def my_disable_cache_import(name, globals=None, locals=None, fromlist=(),
                                level=0):
        if name == "django.core.cache":
            raise ImproperlyConfigured()
        return built_in_import(name, globals, locals, fromlist, level)

    return mock.patch(built_in_import_path, side_effect=my_disable_cache_import)


# {{{ admin

ADMIN_TWO_COURSE_SETUP_LIST = deepcopy(TWO_COURSE_SETUP_LIST)
# switch roles
ADMIN_TWO_COURSE_SETUP_LIST[1]["participations"][0]["role_identifier"] = "ta"
ADMIN_TWO_COURSE_SETUP_LIST[1]["participations"][1]["role_identifier"] = "instructor"  # noqa


class AdminTestMixin(TwoCourseTestMixin):
    courses_setup_list = ADMIN_TWO_COURSE_SETUP_LIST
    none_participation_user_create_kwarg_list = (
        NONE_PARTICIPATION_USER_CREATE_KWARG_LIST)

    @classmethod
    def setUpTestData(cls):  # noqa
        super(AdminTestMixin, cls).setUpTestData()  # noqa

        # create 2 participation (with new user) for course1
        from tests.factories import ParticipationFactory

        cls.course1_student_participation2 = (
            ParticipationFactory.create(course=cls.course1))
        cls.course1_student_participation3 = (
            ParticipationFactory.create(course=cls.course1))
        cls.instructor1 = cls.course1_instructor_participation.user
        cls.instructor2 = cls.course2_instructor_participation.user
        assert cls.instructor1 != cls.instructor2

        # grant all admin permissions to instructors
        from django.contrib.auth.models import Permission

        for user in [cls.instructor1, cls.instructor2]:
            user.is_staff = True
            user.save()
            for perm in Permission.objects.all():
                user.user_permissions.add(perm)

    @classmethod
    def get_admin_change_list_view_url(cls, app_name, model_name):
        return reverse("admin:%s_%s_changelist" % (app_name, model_name))

    @classmethod
    def get_admin_change_view_url(cls, app_name, model_name, args=None):
        if args is None:
            args = []
        return reverse("admin:%s_%s_change" % (app_name, model_name), args=args)

    @classmethod
    def get_admin_add_view_url(cls, app_name, model_name, args=None):
        if args is None:
            args = []
        return reverse("admin:%s_%s_add" % (app_name, model_name), args=args)

    def get_admin_form_fields(self, response):
        """
        Return a list of AdminFields for the AdminForm in the response.
        """
        admin_form = response.context['adminform']
        fieldsets = list(admin_form)

        field_lines = []
        for fieldset in fieldsets:
            field_lines += list(fieldset)

        fields = []
        for field_line in field_lines:
            fields += list(field_line)

        return fields

    def get_admin_form_fields_names(self, response):
        return [f.field.name for f in self.get_admin_form_fields(response)]

    def get_changelist(self, request, model, modeladmin):
        from django.contrib.admin.views.main import ChangeList
        return ChangeList(
            request, model, modeladmin.list_display,
            modeladmin.list_display_links, modeladmin.get_list_filter(request),
            modeladmin.date_hierarchy, modeladmin.search_fields,
            modeladmin.list_select_related, modeladmin.list_per_page,
            modeladmin.list_max_show_all, modeladmin.list_editable, modeladmin,
        )

    def get_filterspec_list(self, request, changelist=None, model=None,
                            modeladmin=None):
        if changelist is None:
            assert request and model and modeladmin
            changelist = self.get_changelist(request, model, modeladmin)

        filterspecs = changelist.get_filters(request)[0]
        filterspec_list = []
        for filterspec in filterspecs:
            choices = tuple(c['display'] for c in filterspec.choices(changelist))
            filterspec_list.append(choices)

        return filterspec_list

# }}}

# vim: fdm=marker