def test_first_argument_not_number(self): self.assertEquals(divide('asd', 2), 'error')
def test_second_argument_not_number(self): self.assertEquals(divide(3, 'asd'), 'error')
def test_divide_number_by_zero(self): self.assertEquals(divide(10, 0), 'error')
def test_divide_zero_by_number(self): self.assertEquals(divide(0, 123), 0)
def test_divide_positive_and_negative(self): self.assertEquals(divide(60, -6), -10)
def test_divide_negative_numbers(self): self.assertEquals(divide(-60, -6), 10)
def test_divide_positive_numbers(self): self.assertEquals(divide(60, 6), 10)