In order to run these tests, you must copy the included api_details_blank.py
file to api_details.py and substitute the API credential placeholders with your
own PayPal test account credentials. All tests will fail unless you do this.

Once your credentials are in place, you'll want to install nose:

    pip install nose

Then either run all of the tests:

    nosetests tests

Or only run one of the suites:

    nosetests tests/test_buttons.py
