open the remotejerootest class and add your own identifying information to the comment at the top. this test class includes a field to represent the island and a field to represent the jeroo. the test class already includes one test written for you. read through it to make sure you understand what it does. note that the testcase base class provides a built-in scanner you can use for test cases. this scanner can be accessed inside any test using the method in(), and its contents can be set inside a test case using setin(). these methods make writing tests of input-driven code easier. by using the existing test method as a model, write a new test method that uses all three movement commands, and that includes appropriate assertions to check that the jeroo ended up in the correct place facing the correct direction. compile and run your tests--they'll both fail, of course, since your jeeroo does not yet actually pay attention to the input stream at all, but you'll fix that later. fix any compilation problems you see.