@Test
public void all() {

	Range<Integer> range = Range.all();
	assertThat((IntPredicate) range::contains)
			.accepts(5, Integer.MAX_VALUE, Integer.MIN_VALUE);
	assertThat((Predicate<Range<Integer>>) range::contains)
			.accepts(Range.exactly(5), Range.of(5, 10))
			.rejects(Range.atMost(5), Range.atLeast(6));
}