human
Solve the following python programming problem given the following code:
# %load test_rotation.py
from nose.tools import assert_equal

class TestRotation(object):

    def test_rotation(self):
        assert_equal(is_rotation('o', 'oo'), False)
        assert_equal(is_rotation(None, 'foo'), False)
        assert_equal(is_rotation('', 'foo'), False)
        assert_equal(is_rotation('', ''), True)
        assert_equal(is_rotation('foobarbaz', 'barbazfoo'), True)
        print('Success: test_rotation')

def main():
    test = TestRotation()
    test.test_rotation()

if __name__ == '__main__':
    main()
Given the above code, generate some markdown instructions for it.
assistant
#Here is the Python program you requested.

Unit Test
The following unit test is expected to fail until you solve the challenge.