ConcurrentMapBasedDoublePredicateMemoizerTest.java 文件源码

/**
*
*/
@Test
@SuppressWarnings(CompilerWarnings.UNUSED)
public void shouldRequireNonNullCache() {
    // given
    final ConcurrentMap<Double, Boolean> cache = null;
    final DoublePredicate predicate = input -> true;
    final DoubleFunction<Double> keyFunction = Double::valueOf;

    // when
    thrown.expect(NullPointerException.class);
    thrown.expectMessage("Provide an empty map instead of NULL.");

    // then
    new ConcurrentMapBasedDoublePredicateMemoizer<>(cache, keyFunction, predicate);
}