ConcurrentMapBasedLongToDoubleFunctionMemoizerTest.java 文件源码

/**
*
*/
@Test
public void shouldUseSetCacheKeyAndValue() {
    // given
    final ConcurrentMap<Long, Double> cache = new ConcurrentHashMap<>();
    final LongToDoubleFunction function = input -> 123;
    final LongFunction<Long> keyFunction = Long::valueOf;

    // when
    final ConcurrentMapBasedLongToDoubleFunctionMemoizer<Long> memoizer = new ConcurrentMapBasedLongToDoubleFunctionMemoizer<>(
            cache, keyFunction, function);

    // then
    memoizer.applyAsDouble(123);
    Assert.assertFalse("Cache is still empty after memoization", memoizer.viewCacheForTest().isEmpty());
    Assert.assertEquals("Memoization key does not match expectations", 123,
            memoizer.viewCacheForTest().keySet().iterator().next().intValue());
    Assert.assertEquals("Memoization value does not match expectations", 123D,
            memoizer.viewCacheForTest().values().iterator().next().doubleValue(), 0.0D);
}