def test_nothing_in_common(self):
string1 = 'nothing in'
string2 = 'common'
response = longest_common_prefix(string1, string2)
expected = 0
self.assertEquals(response, expected)
def test_longest_common_prefix_different_sizes(self):
string1 = 'cada'
string2 = 'cadabra$'
response = longest_common_prefix(string1, string2)
expected = 4
self.assertEquals(response, expected)
def test_longest_common_prefix_python_phrases_inverted(self):
string1 = 'python is cool'
string2 = 'python rocks'
response = longest_common_prefix(string1, string2)
expected = 7
self.assertEquals(response, expected)
def test_longest_common_prefix_empty_string(self):
string1 = ''
string2 = 'other string is empty :/'
response = longest_common_prefix(string1, string2)
expected = 0
self.assertEquals(response, expected)
