def test_01(self): self.assertEqual(Server.reading_length_of_data('asdasd'), 'error', 'error is not returned for nondigits')
def test_05(self): self.assertEqual(Server.handling_data('AB5C00e15helloqwertyuiop'), 'error', 'error should be returned')
def test_04(self): self.assertEqual(Server.handling_data('AB5C0005hello'), 'hello', 'message is not received successfully')
def test_05(self): self.assertEqual(Server.handling_data('AB5C0015helloqwertyuiop'), 'helloqwertyuiop', 'message is not received successfully')
def test_02(self): self.assertEqual(Server.reading_length_of_data('12345'), '1234', 'returned digits are wrong')