memoization-jcache/src/test/java/de/xn__ho_hia/memoization/jcache/JCacheBasedDoubleFunctionMemoizerTest.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
  14 import javax.cache.Cache;
  15
  16 import org.junit.Assert;
  17 import org.junit.Rule;
  18 import org.junit.Test;
  19 import org.junit.rules.ExpectedException;
  20 import org.mockito.Mockito;
  21
  22 import de.xn__ho_hia.memoization.shared.MemoizationException;
  23 import de.xn__ho_hia.quality.suppression.CompilerWarnings;
  24
  25 /**
  26  *
  27  */
  28 @SuppressWarnings({ CompilerWarnings.NLS, CompilerWarnings.STATIC_METHOD })
  29 public class JCacheBasedDoubleFunctionMemoizerTest {
  30
  31     /** Captures expected exceptions. */
  32     @Rule
  33     public ExpectedException thrown = ExpectedException.none();
  34
  35     /**
  36     *
  37     */
  38     @Test
  39     public void shouldMemoizeFunction() {
  40         // given
  41         final DoubleFunction<String> function = a -> "test";
  42         final DoubleFunction<String> keyFunction = a -> "key";
  43         try (final Cache<String, String> cache = JCacheMemoize.createCache(DoubleFunction.class)) {
  44             // when
  45             final JCacheBasedDoubleFunctionMemoizer<String, String> loader = new JCacheBasedDoubleFunctionMemoizer<>(
  46                     cache,
  47                     keyFunction, function);
  48
  49             // then
  50             Assert.assertEquals("Memoized value does not match expectation", "test", loader.apply(123));
  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, String> cache = Mockito.mock(Cache.class)) {
  63             final JCacheBasedDoubleFunctionMemoizer<String, String> loader = new JCacheBasedDoubleFunctionMemoizer<>(
  64                     cache,
  65                     keyFunction, null);
  66             given(cache.invoke(any(), any())).willThrow(RuntimeException.class);
  67
  68             // when
  69             thrown.expect(MemoizationException.class);
  70
  71             // then
  72             loader.apply(123);
  73         }
  74     }
  75
  76 }