class TestViewModelFakeLogging(unittest.TestCase):
def setUp(self):
self.view_model = VectorMetricsViewModel(FakeLogger())
def test_logging_init(self):
self.assertEqual('Welcome to The Float Vector Metrics Calculator!',
self.view_model.logger.get_last_message())
def test_logging_changing_x(self):
self.view_model.set_x('[0, 1, 2]')
self.assertEqual('Setting x vector to [0, 1, 2]', self.view_model.logger.get_last_message())
def test_logging_changing_y(self):
self.view_model.set_y('[0, 1, 2]')
self.assertEqual('Setting y vector to [0, 1, 2]', self.view_model.logger.get_last_message())
def test_logging_changing_metric(self):
self.view_model.set_metric('L1')
self.assertEqual('Setting metric to L1', self.view_model.logger.get_last_message())
def test_logging_changing_uncorrect_x(self):
self.view_model.set_x('{0, 1, 2}')
self.assertEqual('Error: Only list notations supported', self.view_model.logger.get_last_message())
def test_logging_changing_uncorrect_y(self):
self.view_model.set_y('[2, x, 1]')
self.assertEqual('Error: Incorrect expression, only list of float or int values supported',
self.view_model.logger.get_last_message())
def test_logging_uncorrect_compute(self):
expected_messages = ['Button clicked',
'Error: Vectors of different lengths obtained. Distance can only be '
'calculated between vectors of equal length.']
self.view_model.set_x('[1, 0, 2]')
self.view_model.set_y('[1, 1, 1, 3]')
self.view_model.set_metric('L1')
self.view_model.compute()
self.assertEqual(expected_messages, self.view_model.logger.get_log_messages()[-2:])
def test_logging_performing_operation(self):
expected_messages = ['Button clicked', 'Result: 2']
self.view_model.set_x('[1, 0, 2]')
self.view_model.set_y('[1, 1, 1]')
self.view_model.set_metric('L1')
self.view_model.compute()
self.assertEqual(expected_messages, self.view_model.logger.get_log_messages()[-2:])
class TestVectorMetricsViewModel(unittest.TestCase):
def setUp(self):
self.viewmodel = VectorMetricsViewModel()
def test_button_disabled_by_default(self):
self.assertEqual('disabled', self.viewmodel.get_button_state())
def test_button_enabled_when_metric_set(self):
self.viewmodel.set_metric('L1')
self.assertEqual('active', self.viewmodel.get_button_state())
def test_button_disabled_when_x_value_erased(self):
self.viewmodel.set_x('')
self.assertEqual('disabled', self.viewmodel.get_button_state())
def test_button_disabled_when_incorrect_x_value(self):
self.viewmodel.set_x('!')
self.assertEqual('disabled', self.viewmodel.get_button_state())
def test_set_button_state_changes_state(self):
self.viewmodel.set_button_state('active')
self.assertEqual('active', self.viewmodel.get_button_state())
def test_error_message_on_incorrect_value(self):
self.viewmodel.set_y('!')
self.assertEqual(
'Error: Incorrect expression, only list of float or int values supported',
self.viewmodel.get_error_message())
def test_error_message_on_incorrect_type(self):
self.viewmodel.set_y('3')
self.assertEqual('Error: Only list notations supported',
self.viewmodel.get_error_message())
def test_button_enabled_when_correct_x_value(self):
self.viewmodel.set_x('[1, 2, 3]')
self.assertEqual('active', self.viewmodel.get_button_state())
def test_error_message_is_empty_on_correct_value(self):
self.viewmodel.set_y('[1, 2, 3]')
self.assertEqual('', self.viewmodel.get_error_message())
def test_can_change_x_value(self):
self.viewmodel.set_x('[3, 2, 1]')
self.assertEqual('[3, 2, 1]', self.viewmodel.get_x())
def test_can_change_y_value(self):
self.viewmodel.set_y('[4, 5, 1]')
self.assertEqual('[4, 5, 1]', self.viewmodel.get_y())
def test_error_message_is_shown_when_length_unequal(self):
self.viewmodel.set_x('[1, 2, 3]')
self.viewmodel.set_y('[1, 2, 3, 4]')
self.viewmodel.set_metric('L1')
self.viewmodel.compute()
self.assertEqual(
'Error: Vectors of different lengths obtained. Distance can only be '
'calculated between vectors of equal length.',
self.viewmodel.get_error_message())
def test_can_compute_metric(self):
self.viewmodel.set_x('[1.2, 1.5, 1.8]')
self.viewmodel.set_y('[2.2, 2.5, 2.8]')
self.viewmodel.set_metric('L1')
self.viewmodel.compute()
self.assertEqual('Result: 3.0', self.viewmodel.get_result())