def test_get_department_not_exist(self, mock_get_department, mock_abort):
        """Api should return information about department."""
        mock_get_department.return_value = None
        Department.get(1)

        mock_abort.assert_called_once_with(
            404, message="No such department with ID=1")
    def test_get_department_wrong_id_case2(self, mock_get_department,
                                           mock_abort):
        """Api should return error message if id have wrong format."""
        mock_get_department.return_value = None
        Department.get(1.0)

        mock_abort.assert_called_once_with(
            404, message="No such department with ID=1.0")
    def test_get_department(self, mock_get_department):
        """Api should return information about department."""
        mock_get_department.return_value = self.valid_test_data[0]
        response = Department.get(1)

        self.assertEqual(response.status_code, 200)
        self.assertEqual(response.json['department_id'],
                         self.valid_test_data[0]['department_id'])
        self.assertEqual(response.json['manager'],
                         self.valid_test_data[0]['manager'])
        self.assertEqual(response.json['date_of_creation'],
                         self.valid_test_data[0]['date_of_creation'])
        self.assertEqual(response.json['employees'],
                         self.valid_test_data[0]['employees'])
        self.assertEqual(response.json['department_avg_salary'],
                         self.valid_test_data[0]['department_avg_salary'])
        self.assertEqual(response.json['name'],
                         self.valid_test_data[0]['name'])
    def test_get_department_wrong_id_case1(self, mock_abort):
        """Api should return error message if id have wrong format."""
        Department.get('one')

        mock_abort.assert_called_once_with(
            404, message="No such department with ID=one")