memoization-guava/src/test/java/wtf/metio/memoization/guava/GuavaCacheBasedBiFunctionMemoizerTest.java

   1 /*
   2  * SPDX-FileCopyrightText: The memoization.java Authors
   3  * SPDX-License-Identifier: 0BSD
   4  */
   5 package wtf.metio.memoization.guava;
   6
   7 import com.google.common.cache.Cache;
   8 import com.google.common.cache.CacheBuilder;
   9 import org.junit.jupiter.api.Assertions;
  10 import org.junit.jupiter.api.Test;
  11
  12 import java.util.function.BiFunction;
  13
  14 class GuavaCacheBasedBiFunctionMemoizerTest {
  15
  16     @Test
  17     void shouldAcceptCacheAndKeyFunctionAndBiFunction() {
  18         // given
  19         final BiFunction<String, String, String> biFunction = (first, second) -> first + second;
  20         final BiFunction<String, String, String> keyFunction = (first, second) -> second + first;
  21         final Cache<String, String> cache = CacheBuilder.newBuilder().build();
  22
  23         // when
  24         final var memoizer = new GuavaCacheBasedBiFunctionMemoizer<>(cache, keyFunction, biFunction);
  25
  26         // then
  27         Assertions.assertNotNull(memoizer);
  28     }
  29
  30     @Test
  31     void shouldTransformInput() {
  32         // given
  33         final BiFunction<String, String, String> biFunction = (first, second) -> first + second;
  34         final BiFunction<String, String, String> keyFunction = (first, second) -> second + first;
  35         final Cache<String, String> cache = CacheBuilder.newBuilder().build();
  36
  37         // when
  38         final var memoizer = new GuavaCacheBasedBiFunctionMemoizer<>(cache, keyFunction, biFunction);
  39
  40         // then
  41         Assertions.assertEquals("firstsecond", memoizer.apply("first", "second"));
  42     }
  43
  44 }