memoization-guava/src/test/java/de/xn__ho_hia/memoization/guava/GuavaCacheBasedBiPredicateMemoizerTest.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.guava;
   8
   9 import java.util.function.BiFunction;
  10 import java.util.function.BiPredicate;
  11
  12 import com.google.common.cache.Cache;
  13 import com.google.common.cache.CacheBuilder;
  14
  15 import org.junit.Assert;
  16 import org.junit.Rule;
  17 import org.junit.Test;
  18 import org.junit.rules.ExpectedException;
  19
  20 import de.xn__ho_hia.quality.suppression.CompilerWarnings;
  21
  22 /**
  23  *
  24  *
  25  */
  26 @SuppressWarnings({ CompilerWarnings.NLS, CompilerWarnings.STATIC_METHOD })
  27 public class GuavaCacheBasedBiPredicateMemoizerTest {
  28
  29     /** Captures expected exceptions. */
  30     @Rule
  31     public ExpectedException thrown = ExpectedException.none();
  32
  33     /**
  34     *
  35     */
  36     @Test
  37     public void shouldAcceptCacheAndKeyFunctionAndBiPredicate() {
  38         // given
  39         final BiPredicate<String, String> biFunction = (first, second) -> true;
  40         final BiFunction<String, String, String> keyFunction = (first, second) -> second + first;
  41         final Cache<String, Boolean> cache = CacheBuilder.newBuilder().build();
  42
  43         // when
  44         final GuavaCacheBasedBiPredicateMemoizer<String, String, String> memoizer = new GuavaCacheBasedBiPredicateMemoizer<>(
  45                 cache, keyFunction, biFunction);
  46
  47         // then
  48         Assert.assertNotNull(memoizer);
  49     }
  50
  51     /**
  52     *
  53     */
  54     @Test
  55     public void shouldTransformInput() {
  56         // given
  57         final BiPredicate<String, String> biFunction = (first, second) -> true;
  58         final BiFunction<String, String, String> keyFunction = (first, second) -> second + first;
  59         final Cache<String, Boolean> cache = CacheBuilder.newBuilder().build();
  60
  61         // when
  62         final GuavaCacheBasedBiPredicateMemoizer<String, String, String> memoizer = new GuavaCacheBasedBiPredicateMemoizer<>(
  63                 cache, keyFunction, biFunction);
  64
  65         // then
  66         Assert.assertTrue(memoizer.test("first", "second"));
  67     }
  68
  69 }