def METHOD_NAME(self, env, result, a, b):
    # It's a good practice to generate a description
    # with the parametrized arguments as well.
    # So that you can have more context when you inspect the test report.
    result.equal(
        actual=a + b,
        expected=b + a,
        description="{a} + {b} == {b} + {a}".format(a=a, b=b),
    )
    # Generated testcases will have the following contexts:
    # result.equal(1 + 0, 0 + 1, ...)
    # result.equal(10 + 0, 0 + 10, ...)
    # result.equal(-5 + 0, 0 + -5, ...)
    # ...
    # ...
    # result.equal(3e12 + -.231, 3e12 + -.231, ...)
    # result.equal(3e12 + 5.5e5, 3e12 + 5.5e5, ...)