memoization-jcache/src/test/java/de/xn__ho_hia/memoization/jcache/JCacheBasedDoublePredicateMemoizerTest.java

   1 /*
   2  * This file is part of memoization.java. It is subject to the license terms in the LICENSE file found in the top-level
   3  * directory of this distribution and at http://creativecommons.org/publicdomain/zero/1.0/. No part of memoization.java,
   4  * including this file, may be copied, modified, propagated, or distributed except according to the terms contained
   5  * in the LICENSE file.
   6  */
   7 package de.xn__ho_hia.memoization.jcache;
   8
   9 import static org.mockito.BDDMockito.given;
  10 import static org.mockito.Matchers.any;
  11
  12 import java.util.function.DoubleFunction;
  13 import java.util.function.DoublePredicate;
  14
  15 import javax.cache.Cache;
  16
  17 import org.junit.Assert;
  18 import org.junit.Rule;
  19 import org.junit.Test;
  20 import org.junit.rules.ExpectedException;
  21 import org.mockito.Mockito;
  22
  23 import de.xn__ho_hia.memoization.shared.MemoizationException;
  24 import de.xn__ho_hia.quality.suppression.CompilerWarnings;
  25
  26 /**
  27  *
  28  */
  29 @SuppressWarnings({ CompilerWarnings.NLS, CompilerWarnings.STATIC_METHOD })
  30 public class JCacheBasedDoublePredicateMemoizerTest {
  31
  32     /** Captures expected exceptions. */
  33     @Rule
  34     public ExpectedException thrown = ExpectedException.none();
  35
  36     /**
  37     *
  38     */
  39     @Test
  40     public void shouldMemoizePredicate() {
  41         // given
  42         final DoublePredicate predicate = a -> true;
  43         final DoubleFunction<String> keyFunction = a -> "key";
  44         try (final Cache<String, Boolean> cache = JCacheMemoize.createCache(DoublePredicate.class)) {
  45             // when
  46             final JCacheBasedDoublePredicateMemoizer<String> loader = new JCacheBasedDoublePredicateMemoizer<>(cache,
  47                     keyFunction, predicate);
  48
  49             // then
  50             Assert.assertTrue("Memoized value does not match expectation", loader.test(123.456D));
  51         }
  52     }
  53
  54     /**
  55     *
  56     */
  57     @Test
  58     @SuppressWarnings(CompilerWarnings.UNCHECKED)
  59     public void shouldWrapRuntimeExceptionInMemoizationException() {
  60         // given
  61         final DoubleFunction<String> keyFunction = a -> "key";
  62         try (final Cache<String, Boolean> cache = Mockito.mock(Cache.class)) {
  63             final JCacheBasedDoublePredicateMemoizer<String> loader = new JCacheBasedDoublePredicateMemoizer<>(cache,
  64                     keyFunction, null);
  65             given(cache.invoke(any(), any())).willThrow(RuntimeException.class);
  66
  67             // when
  68             thrown.expect(MemoizationException.class);
  69
  70             // then
  71             loader.test(123.456D);
  72         }
  73     }
  74
  75 }