def test_validation_raises_exception_if_one_of_the_elements_of_the_tuples_is_not_integer(self): fractions = [(1, 5), (1, 2.0)] exc = None try: validate_input_collect(fractions) except Exception as err: exc = err self.assertIsNotNone(exc) self.assertEqual(str(exc), 'Tuple can only contain integers.')
def test_validation_raises_exception_if_one_of_the_elements_has_denominator_zero(self): fractions = [(1, 2), (1, 0)] exc = None try: validate_input_collect(fractions) except Exception as err: exc = err self.assertIsNotNone(exc) self.assertEqual(str(exc), 'Cannot devide by zero.')
def test_validation_raises_exception_if_length_of_element_is_not_two(self): fractions = [(1, 2), (1, 3, 4)] exc = None try: validate_input_collect(fractions) except Exception as err: exc = err self.assertIsNotNone(exc) self.assertEqual(str(exc), 'Tuple can only contain 2 elements.')
def test_validation_raises_exception_if_fractions_is_not_of_type_list(self): fractions = ((1, 3), (4, 5)) exc = None try: validate_input_collect(fractions) except Exception as err: exc = err self.assertIsNotNone(exc) self.assertEqual(str(exc), 'Argument can only be of type "list".')
def test_validation_raises_exception_with_empty_list(self): fractions = [] exc = None try: validate_input_collect(fractions) except Exception as err: exc = err self.assertIsNotNone(exc) self.assertEqual(str(exc), 'List cannot be empty.')
def sort_fractions(fractions, ascending=True):
validate_input_collect(fractions)
validate_ascending(ascending)
length = len(fractions)
for i in range(0, length - 1):
for j in range(0, length - i - 1):
a = fractions[j]
b = fractions[j + 1]
if (a[0] / a[1]) > (b[0] / b[1]):
helper = fractions[j]
fractions[j] = fractions[j + 1]
fractions[j + 1] = helper
if ascending == False:
fractions.reverse()
return fractions
def test_validation_passes_with_correct_input(self): fractions = [(1, 3), (4, 5)] validate_input_collect(fractions)