def test_true_3(self): self.assertTrue(is_valid_HK_phone_number('9684 2396'))
def test_false_10(self): self.assertFalse(is_valid_HK_phone_number('8A65 2986'))
def test_true_1(self): self.assertTrue(is_valid_HK_phone_number('1234 5678'))
def test_false_6(self): self.assertFalse(is_valid_HK_phone_number('836g 2986'))
def test_false_8(self): self.assertFalse(is_valid_HK_phone_number(' 987 634 '))
def test_false_1(self): self.assertFalse(is_valid_HK_phone_number('85748475'))
def test_false_3(self): self.assertFalse(is_valid_HK_phone_number('sklfjsdklfjsf'))
def test_false_7(self): self.assertFalse(is_valid_HK_phone_number('123456789'))
def test_false_5(self): self.assertFalse(is_valid_HK_phone_number('abcd efgh'))
def test_false_2(self): self.assertFalse(is_valid_HK_phone_number('3857 4756'))
def test_true_4(self): self.assertTrue(is_valid_HK_phone_number('0000 0000'))
def test_false_9(self): self.assertFalse(is_valid_HK_phone_number(' 6 '))
def test_false_11(self): self.assertFalse(is_valid_HK_phone_number('8368 2aE6'))
def test_false_12(self): self.assertFalse(is_valid_HK_phone_number('8c65 2i86'))
def test_true_2(self): self.assertTrue(is_valid_HK_phone_number('2359 1478'))