function test_get_fixtures_for_all_tables()
 {
     $dbh = TestDB::get_instance();
     $data = $dbh->get_test_data();
     $fixtures = new SimpleFixtures($dbh);
     $fixtures->enqueue('users', $data['users'], array('auto_id' => false, 'auto_ref' => false));
     $fixtures->enqueue('user_friends', $data['user_friends'], array('auto_id' => false, 'auto_ref' => false));
     $retrieved_data = $fixtures->get('*');
     assert_true(isset($retrieved_data['users'])) and assert_equal($retrieved_data['users'], $data['users']);
     assert_true(isset($retrieved_data['user_friends'])) and assert_equal($retrieved_data['user_friends'], $data['user_friends']);
 }