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