ConcurrentMapBasedLongFunctionMemoizerTest.java 文件源码

/**
 *
 */
@Test
@SuppressWarnings(CompilerWarnings.UNUSED)
public void shouldRequireNonNullCache() {
    // given
    final ConcurrentMap<String, String> cache = null;
    final LongFunction<String> function = input -> "output";
    final LongFunction<String> keyFunction = input -> "key";

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

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