django TestCase正在引发NotImplementedError

Question

我有以下测试用例

from rest_framework.test import APIClient
from django.test import TestCase
from factories import UserFactory

class TestUserApi(TestCase):
    def setUp(self):
        # Create or get model factory objects
        self.users = UserFactory()
        self.client = APIClient()

    def test_user_list(self):
        response = self.client.get('/api/1/users/')
        self.assertEqual(response.status_code, status.HTTP_200_OK)

    def tearDown(self):
        pass

当我运行上述测试用例时，我收到以下错误，我不明白为什么？

ERROR: test_user_list (test_cases.TestUserApi)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/django/test/testcases.py", line 178, in __call__
    self._pre_setup()
  File "/usr/local/lib/python2.7/dist-packages/django/test/testcases.py", line 749, in _pre_setup
    self._fixture_setup()
  File "/usr/local/lib/python2.7/dist-packages/django/test/testcases.py", line 861, in _fixture_setup
    if not connections_support_transactions():
  File "/usr/local/lib/python2.7/dist-packages/django/test/testcases.py", line 848, in connections_support_transactions
    for conn in connections.all())
  File "/usr/local/lib/python2.7/dist-packages/django/test/testcases.py", line 848, in <genexpr>
    for conn in connections.all())
  File "/usr/local/lib/python2.7/dist-packages/django/utils/functional.py", line 49, in __get__
    res = instance.__dict__[self.func.__name__] = self.func(instance)
  File "/usr/local/lib/python2.7/dist-packages/django/db/backends/__init__.py", line 676, in supports_transactions
    self.connection.leave_transaction_management()
  File "/usr/local/lib/python2.7/dist-packages/django/db/backends/__init__.py", line 324, in leave_transaction_management
    if managed == self.get_autocommit():
  File "/usr/local/lib/python2.7/dist-packages/django/db/backends/__init__.py", line 331, in get_autocommit
    self.ensure_connection()
  File "/usr/local/lib/python2.7/dist-packages/django/db/backends/__init__.py", line 127, in ensure_connection
    self.connect()
  File "/usr/local/lib/python2.7/dist-packages/django/db/backends/__init__.py", line 114, in connect
    conn_params = self.get_connection_params()
  File "/usr/local/lib/python2.7/dist-packages/django/db/backends/__init__.py", line 86, in get_connection_params
    raise NotImplementedError
NotImplementedError:

修改

DATABASES = {
    'default': {
        'ENGINE':   'django.db.backends.mysql',
        'NAME':     'integration_tests',
        'USER':     'root',
        'PASSWORD': 'root',
        'HOST':     '192.16x.xx.x',
        'PORT':     '3306',
    },
}