def test_sample_0_return_2(self):
s1 = 'HARRY'
s2 = 'SALLY'
expected = 2
self.assertEqual(expected, common_child(s1, s2))
def test_sample_s1_equal_s2_return_size_s1(self):
s1 = 'ABCD'
s2 = 'ABCD'
expected = len(s1)
self.assertEqual(expected, common_child(s1, s2))
def test_sample_2_return_3(self):
s1 = 'SHINCHAN'
s2 = 'NOHARAAA'
expected = 3
self.assertEqual(expected, common_child(s1, s2))
def test_sample_3_return_3(self):
s1 = 'ABCDEF'
s2 = 'FBDAMN'
expected = 2
self.assertEqual(expected, common_child(s1, s2))
def test_sample_1_return_0(self):
s1 = 'AA'
s2 = 'BB'
expected = 0
self.assertEqual(expected, common_child(s1, s2))