def test_correct_age_is_calculated(self):
birth_year = 1990
assert ageCalculator(birth_year) == 28
def test_only_integer_is_accepted(self):
birth_year = 'Nineteen Ninty'
self.assertEqual(ageCalculator(birth_year), 'Please enter a number.')
def test_year_less_than_expected(self):#method to test if a year below 1900 is supplied as input.
birth_year = 1800
self.assertEqual(ageCalculator(birth_year), 'Enter valid year' )
def test_string_to_integer_is_accepted(self):
birth_year = '1990'
self.assertEqual(ageCalculator(int(birth_year)), 28)