ConcurrentMapBasedDoubleUnaryOperatorMemoizerTest.java 文件源码

/**
*
*/
@Test
public void shouldUseSetCacheKeyAndValue() {
    // given
    final ConcurrentMap<Double, Double> cache = new ConcurrentHashMap<>();
    final DoubleUnaryOperator operator = input -> input;
    final DoubleFunction<Double> keyFunction = Double::valueOf;

    // when
    final ConcurrentMapBasedDoubleUnaryOperatorMemoizer<Double> memoizer = new ConcurrentMapBasedDoubleUnaryOperatorMemoizer<>(
            cache, keyFunction, operator);

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