def test_duration_init_correctly_initializes_an_object(self):
test1 = Duration('5:55')
test2 = Duration('6:23:11')
self.assertEqual(test1.hours, '0')
self.assertEqual(test1.minutes, '5')
self.assertEqual(test1.seconds, '55')
self.assertEqual(test2.hours, '6')
self.assertEqual(test2.minutes, '23')
self.assertEqual(test2.seconds, '11')
def test_length_validation_raises_exception_if_hours_less_than_zero(self):
length = '-3:45:2'
exc = None
try:
Duration.is_valid_length(length)
except Exception as err:
exc = err
self.assertIsNotNone(exc)
self.assertEqual(str(exc), 'Hours cannot be negative.')
def test_length_validation_raises_exception_if_less_than_4_characters(
self):
length = ':22'
exc = None
try:
Duration.is_valid_length(length)
except Exception as err:
exc = err
self.assertIsNotNone(exc)
self.assertEqual(str(exc), 'Length cannot be less than 4 symbols.')
def test_length_validation_raises_exception_if_seconds_greater_than_sixty(
self):
length = '20:65'
exc = None
try:
Duration.is_valid_length(length)
except Exception as err:
exc = err
self.assertIsNotNone(exc)
self.assertEqual(str(exc), 'Seconds cannot be more than 59.')
def test_length_validation_raises_exception_if_more_than_2_dots(self):
length = '5:3:5:'
exc = None
try:
Duration.is_valid_length(length)
except Exception as err:
exc = err
self.assertIsNotNone(exc)
self.assertEqual(
str(exc), 'Length can only include seconds, minutes and hours.')
def test_length_validation_raises_exception_if_Duration_length_is_zero(
self):
length = '00:00'
exc = None
try:
Duration.is_valid_length(length)
except Exception as err:
exc = err
self.assertIsNotNone(exc)
self.assertEqual(str(exc), "Duration's length cannot be zero.")
def test_length_validation_raises_exception_if_seconds_not_represented_by_two_digits(
self):
length = '45:2'
exc = None
try:
Duration.is_valid_length(length)
except Exception as err:
exc = err
self.assertIsNotNone(exc)
self.assertEqual(str(exc), 'Two digits represent seconds.')
def test_length_validation_raises_exception_if_dots_are_not_placed_correctly(
self):
length = '5::5'
exc = None
try:
Duration.is_valid_length(length)
except Exception as err:
exc = err
self.assertIsNotNone(exc)
self.assertEqual(str(exc),
'Error: Found ":" in an unexpected position.')
def test_length_validation_raises_exception_if_no_dots(self):
length = '5555'
exc = None
try:
Duration.is_valid_length(length)
except Exception as err:
exc = err
self.assertIsNotNone(exc)
self.assertEqual(
str(exc),
'Length must have ":" to distinguish seconds, minutes and hours.')
def test_length_validation_raises_exception_if_mins_not_represented_by_two_digits_if_hour(
self):
length = '1:5:22'
exc = None
try:
Duration.is_valid_length(length)
except Exception as err:
exc = err
self.assertIsNotNone(exc)
self.assertEqual(
str(exc),
"Two digits represent minutes, if duration is more than an hour.")
def test_duration_eq_dunder_correctly_compares_duration_objects(self):
test1 = Duration('5:55')
test2 = Duration('5:55')
test3 = Duration('6:23:11')
self.assertEqual(test1, test2)
self.assertNotEqual(test2, test3)
def test_duration_str_dunder_representation_is_as_expected(self):
test1 = Duration('5:55')
test2 = Duration('6:23:11')
self.assertEqual(str(test1), '5:55')
self.assertEqual(str(test2), '6:23:11')
def test_length_validation_passes_with_correct_input(self):
Duration.is_valid_length('0:01')
Duration.is_valid_length('50:21')
Duration.is_valid_length('1:10:01')
Duration.is_valid_length('10:00')
Duration.is_valid_length('0:55')