def test_when_calc_hours_passed_am_start_pm_end_am_cutoff_it_returns_0(self):
self.assertEqual(calc.calc_hours(calc.get_time(2), calc.get_time(18), calc.get_time(1)), 0)
def test_when_calc_hours_passed_pm_start_am_end_pm_cutoff_it_returns_hours(self):
self.assertEqual(calc.calc_hours(calc.get_time(17), calc.get_time(3), calc.get_time(19)), 2)
def test_when_calc_hours_passed_end_one_hour_after_start_it_returns_1(self):
self.assertEqual(calc.calc_hours(calc.get_time(17), calc.get_time(18), calc.get_time(23)), 1)
def test_when_calc_hours_passed_4_to_4_it_returns_0(self):
self.assertEqual(calc.calc_hours(calc.get_time(4), calc.get_time(4), calc.get_time(4)), 0)
def test_when_calc_hours_passed_same_end_start_it_returns_0(self):
self.assertEqual(calc.calc_hours(calc.get_time(17), calc.get_time(17), calc.get_time(18)), 0)
