Pragmatic Unit Testing in Java with JUnit, 3rd Edition

Final Cleanup

Let’s return to the fun and see how tight you can make the code.

First, replace the old-school loops with Java streams. Start with anyMatches:

utj3-refactor/13/src/main/java/iloveyouboss/Profile.java

private boolean anyMatches(Criteria criteria) {
    return criteria.stream()
        .anyMatch(criterion ->
            criterion.isMatch(profileAnswerMatching(criterion)));
}

To get that compiling and passing, you’ll need to add a stream method to the Criteria record:

utj3-refactor/13/src/main/java/iloveyouboss/Criteria.java

public Stream<Criterion> stream() {
    return criteria.stream();
}

Next, rework the calculateScore method:

utj3-refactor/13/src/main/java/iloveyouboss/Profile.java

private void calculateScore(Criteria criteria) ...