### Question:
IsLessThanOrEqual implements BinaryPredicate<T, T> { public boolean test(T left, T right) { return comparator.compare(left, right) <= 0; } @SuppressWarnings("unchecked")  IsLessThanOrEqual();  IsLessThanOrEqual(Comparator<? super T> comparator); boolean test(T left, T right); @Override boolean equals(Object obj); @Override int hashCode(); @Override String toString(); static IsLessThanOrEqual<T> instance(); static Predicate<T> instance(T right); static final IsLessThanOrEqual<Comparable<?>> INSTANCE; }### Answer:
@Test public void testTest() throws Exception { IsLessThanOrEqual<Integer> p = new IsLessThanOrEqual<Integer>(); assertTrue(p.test(Integer.valueOf(2),Integer.valueOf(4))); assertTrue(p.test(Integer.valueOf(3),Integer.valueOf(4))); assertTrue(p.test(Integer.valueOf(4),Integer.valueOf(4))); assertFalse(p.test(Integer.valueOf(5),Integer.valueOf(4))); assertFalse(p.test(Integer.valueOf(6),Integer.valueOf(4))); }