def test_ll(self):
        """test the 'll' alias for 'ls -l'"""
        output = self.run_command("ll", exitcode=0)
        # we cant test the complete output, but we can still test for
        # filename existence and exitcode
        self.assertIn("file1.txt", output)
        self.assertIn("file2.txt", output)
        self.assertIn("otherfile.txt", output)
        self.assertIn(".hidden", output)
test the 'll' alias for 'ls -l'
tests/ls/test_ls.py