How to use _clear_instance_cache method in autotest

Best Python code snippet using autotest_python

scheduler_models_unittest.py

Source:scheduler_models_unittest.py

...18    def _do_query(self, sql):19        self._database.execute(sql)20    def _set_monitor_stubs(self):21        # Clear the instance cache as this is a brand new database.22        scheduler_models.DBObject._clear_instance_cache()23        self._database = (24            database_connection.TranslatingDatabase.get_test_database(25                translators=scheduler_lib._DB_TRANSLATORS))26        self._database.connect(db_type='django')27        self._database.debug = _DEBUG28        self.god.stub_with(scheduler_models, '_db', self._database)29    def setUp(self):30        self._frontend_common_setup()31        self._set_monitor_stubs()32    def tearDown(self):33        self._database.disconnect()34        self._frontend_common_teardown()35    def _update_hqe(self, set, where=''):36        query = 'UPDATE afe_host_queue_entries SET ' + set37        if where:38            query += ' WHERE ' + where39        self._do_query(query)40class DBObjectTest(BaseSchedulerModelsTest):41    def test_compare_fields_in_row(self):42        host = scheduler_models.Host(id=1)43        fields = list(host._fields)44        row_data = [getattr(host, fieldname) for fieldname in fields]45        self.assertEqual({}, host._compare_fields_in_row(row_data))46        row_data[fields.index('hostname')] = 'spam'47        self.assertEqual({'hostname': ('host1', 'spam')},48                         host._compare_fields_in_row(row_data))49        row_data[fields.index('id')] = 2350        self.assertEqual({'hostname': ('host1', 'spam'), 'id': (1, 23)},51                         host._compare_fields_in_row(row_data))52    def test_compare_fields_in_row_datetime_ignores_microseconds(self):53        datetime_with_us = datetime.datetime(2009, 10, 07, 12, 34, 56, 7890)54        datetime_without_us = datetime.datetime(2009, 10, 07, 12, 34, 56, 0)55        class TestTable(scheduler_models.DBObject):56            _table_name = 'test_table'57            _fields = ('id', 'test_datetime')58        tt = TestTable(row=[1, datetime_without_us])59        self.assertEqual({}, tt._compare_fields_in_row([1, datetime_with_us]))60    def test_always_query(self):61        host_a = scheduler_models.Host(id=2)62        self.assertEqual(host_a.hostname, 'host2')63        self._do_query('UPDATE afe_hosts SET hostname="host2-updated" '64                       'WHERE id=2')65        host_b = scheduler_models.Host(id=2, always_query=True)66        self.assert_(host_a is host_b, 'Cached instance not returned.')67        self.assertEqual(host_a.hostname, 'host2-updated',68                         'Database was not re-queried')69        # If either of these are called, a query was made when it shouldn't be.70        host_a._compare_fields_in_row = lambda _: self.fail('eek! a query!')71        host_a._update_fields_from_row = host_a._compare_fields_in_row72        host_c = scheduler_models.Host(id=2, always_query=False)73        self.assert_(host_a is host_c, 'Cached instance not returned')74    def test_delete(self):75        host = scheduler_models.Host(id=3)76        host.delete()77        host = self.assertRaises(scheduler_models.DBError, scheduler_models.Host, id=3,78                                 always_query=False)79        host = self.assertRaises(scheduler_models.DBError, scheduler_models.Host, id=3,80                                 always_query=True)81    def test_save(self):82        # Dummy Job to avoid creating a one in the HostQueueEntry __init__.83        class MockJob(object):84            def __init__(self, id, row):85                pass86            def tag(self):87                return 'MockJob'88        self.god.stub_with(scheduler_models, 'Job', MockJob)89        hqe = scheduler_models.HostQueueEntry(90                new_record=True,91                row=[0, 1, 2, 'Queued', None, 0, 0, 0, '.', None, False, None,92                     None])93        hqe.save()94        new_id = hqe.id95        # Force a re-query and verify that the correct data was stored.96        scheduler_models.DBObject._clear_instance_cache()97        hqe = scheduler_models.HostQueueEntry(id=new_id)98        self.assertEqual(hqe.id, new_id)99        self.assertEqual(hqe.job_id, 1)100        self.assertEqual(hqe.host_id, 2)101        self.assertEqual(hqe.status, 'Queued')102        self.assertEqual(hqe.meta_host, None)103        self.assertEqual(hqe.active, False)104        self.assertEqual(hqe.complete, False)105        self.assertEqual(hqe.deleted, False)106        self.assertEqual(hqe.execution_subdir, '.')107        self.assertEqual(hqe.started_on, None)108        self.assertEqual(hqe.finished_on, None)109class HostTest(BaseSchedulerModelsTest):110    def setUp(self):...

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