Hamcrest matchers for Optional class

OptionalMatcher.java

public class OptionalMatcher {

    public static IsPresentMatcher isPresent() {
        return new IsPresentMatcher();
    }

    public static IsEmptyMatcher isEmpty() {
        return new IsEmptyMatcher();
    }

    public static class IsPresentMatcher extends TypeSafeDiagnosingMatcher<Optional> {

        @Override
        protected boolean matchesSafely(Optional optional, Description description) {
            return optional.isPresent();
        }

        @Override
        public void describeTo(Description description) {
            description.appendText("Optional value should be present");
        }
    }

    public static class IsEmptyMatcher extends TypeSafeDiagnosingMatcher<Optional> {

        @Override
        protected boolean matchesSafely(Optional optional, Description description) {
            return !optional.isPresent();
        }

        @Override
        public void describeTo(Description description) {
            description.appendText("Optional value should be empty");
        }
    }
}