python - 跨 LiveServerTestCase 测试方法保留数据？

Question

因为 LiveServerTestCase继承自 TransactionTestCase ，默认行为是在每个测试方法结束时删除测试数据。我想用LiveServerTestCase类，但保留方法之间的测试数据。在本例中，test2失败，因为数据库在 test1 的末尾被截断.

我的理解是，如果我使用 TestCase ，它将在每次测试结束时回滚事务并将数据库返回到其起始状态。我可以在使用 LiveServerTestCase 时模仿这种行为吗？ ?

class TestTheTests(LiveServerTestCase):

    @classmethod
    def setUpTestData(cls):
        print('running setUpTestData')
        call_command('loaddata', 'datasources.yaml' )

    @classmethod
    def setUpClass(cls):
        print('starting setUpClass')
        cls.setUpTestData() # load the data for the entire test class
        super().setUpClass()

    @classmethod
    def tearDownClass(cls):
        print('finished tearDownClass')
        super().tearDownClass()

    def setUp(self):
        self.browser = webdriver.Chrome()

    def tearDown(self):
        self.browser.quit()

当我同时运行这两个测试时，此测试通过:

    def test1(self):
        print('test 1 running')
        self.assertEquals(8, DataSource.objects.count(),'There should be 8 DataSource objects in test1')

此测试失败:

    def test2(self):
        print('test 2 running')
        self.assertEquals(8, DataSource.objects.count(),'There should be 8 DataSource objects in test2')

如果在 test1 末尾没有删除数据库记录，两者都会通过。 .

Answer 1

摘自:https://docs.djangoproject.com/en/3.1/topics/testing/overview/#rollback-emulation

Django can reload that data for you on a per-testcase basis by setting the serialized_rollback option to True in the body of the TestCase or TransactionTestCase, but note that this will slow down that test suite by approximately 3x.

这将解决您的问题:

class TestTheTests(LiveServerTestCase):
    serialized_rollback = True
    ...