def test_assign_average_using_B(self): self.assertEqual(a.switch_average('B'), 80)
def test_assign_average_using_A(self): self.assertEqual(a.switch_average('A'), 90)
def test_assign_average_using_invalid_key(self): self.assertEqual(a.switch_average('Z'), 'Value not found for Z.')
def test_assign_average_using_F(self): self.assertEqual(a.switch_average('F'), 0)
def test_assign_average_using_D(self): self.assertEqual(a.switch_average('D'), 60)
def test_assign_average_using_C(self): self.assertEqual(a.switch_average('C'), 70)