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

class TestMaximingXor(object):

    def test_maximizing_xor(self):
        assert_equal(max_xor(10, 15), 7)
        print('Success: test_maximizing_xor')

def main():
    test = TestMaximingXor()
    test.test_maximizing_xor()

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

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