def test_long_substr_empty():
data = []
nt.assert_equals(text.long_substr(data), '')
def test_long_substr():
data = ['hi']
nt.assert_equals(text.long_substr(data), 'hi')
def test_long_substr2():
data = ['abc', 'abd', 'abf', 'ab']
nt.assert_equals(text.long_substr(data), 'ab')
def test_long_substr_empty():
data = []
nt.assert_equal(text.long_substr(data), '')
def test_long_substr2():
data = ['abc', 'abd', 'abf', 'ab']
nt.assert_equal(text.long_substr(data), 'ab')
def test_long_substr():
data = ['hi']
nt.assert_equal(text.long_substr(data), 'hi')
def test_long_substr2():
data = ["abc", "abd", "abf", "ab"]
nt.assert_equal(text.long_substr(data), "ab")
def test_long_substr():
data = ["hi"]
nt.assert_equal(text.long_substr(data), "hi")
