zyLabUnitTest.java

/**
 * Instructors in our system have the ability to write a *unit test* against their students code
 * using the following interface.  The *only* thing they can edit is the contents of the `passed` function.
 * But, they can create a student's object, run their own code, and pass us a true/false value as to whether
 * the test passed. 
 */
public class zyLabsUnitTest {
    public boolean passed() {
        // Write your code here.  
        // e.g return student_add(4, 2) == 6;
    }
}

/**
 * This has worked well, but now instructors want to give their students more information, ideally by just writing
 * to System.out.println() regarding the test.
 * e.g  Testing your `add` function with 4 and 2.
 * But they dont want to pollute the students output with their output, so we want to provide some sort of method to 
 * allow them to write content, ideally by passing something into the `passed` method.
 * e.g
 */
 public class zyLabsUnitTest {
    public boolean passed(SomeStream s) {
        s.write('Testing your code with a string');
        return some_func('test string');
    }
}