ConcurrentMapBasedLongToIntFunctionMemoizerTest.java 文件源码

/**
*
*/
@Test
@SuppressWarnings(CompilerWarnings.UNUSED)
public void shouldRequireNonNullCache() {
    // given
    final ConcurrentMap<Long, Integer> cache = null;
    final LongToIntFunction function = input -> 123;
    final LongFunction<Long> keyFunction = Long::valueOf;

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

    // then
    new ConcurrentMapBasedLongToIntFunctionMemoizer<>(cache, keyFunction, function);
}