def test_last(self):
s = StringList(initial=["A", "list", "of", "strings"])
self.assertEqual(s.last, "strings")
with self.assertRaises(IndexError):
s.pop()
s.pop()
s.pop()
s.pop()
s.last
def test_pop(self):
s = StringList(initial=["A", "list", "of", "strings"])
s1 = s.pop()
self.assertTrue(len(s) == 3)
self.assertTrue(s1 == "strings")
s1 = s.pop()
self.assertTrue(len(s) == 2)
self.assertTrue(s1 == "of")
s1 = s.pop()
self.assertTrue(len(s) == 1)
self.assertTrue(s1 == "list")
s1 = s.pop()
self.assertTrue(len(s) == 0)
self.assertTrue(s1 == "A")
with self.assertRaises(IndexError):
s.pop()