src/test/java/net/pterodactylus/sone/utils/OptionalsTest.java

   1 package net.pterodactylus.sone.utils;
   2
   3 import java.util.Arrays;
   4 import java.util.List;
   5
   6 import com.google.common.base.Optional;
   7 import com.google.common.collect.FluentIterable;
   8 import org.hamcrest.MatcherAssert;
   9 import org.hamcrest.Matchers;
  10 import org.junit.Test;
  11
  12 /**
  13  * Unit test for {@link Optionals}.
  14  *
  15  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  16  */
  17 public class OptionalsTest {
  18
  19         private final Object object1 = new Object();
  20         private final Object object2 = new Object();
  21         private final Object object3 = new Object();
  22
  23         @Test
  24         public void canCreateOptionals() {
  25                 new Optionals();
  26         }
  27
  28         @Test
  29         public void isPresentFiltersCorrectOptionals() {
  30                 List<Optional<Object>> optionals = Arrays.asList(
  31                                 Optional.of(object1), Optional.absent(),
  32                                 Optional.of(object2), Optional.absent(),
  33                                 Optional.of(object3), Optional.absent()
  34                 );
  35                 List<Optional<Object>> filteredOptionals =
  36                                 FluentIterable.from(optionals).filter(Optionals.isPresent()).toList();
  37                 MatcherAssert.assertThat(filteredOptionals, Matchers.contains(
  38                                 Optional.of(object1), Optional.of(object2), Optional.of(object3)));
  39         }
  40
  41         @Test
  42         public void getReturnsCorrectValues() {
  43                 List<Optional<Object>> optionals = Arrays.asList(
  44                                 Optional.of(object1),
  45                                 Optional.of(object2),
  46                                 Optional.of(object3)
  47                 );
  48                 List<Object> objects = FluentIterable.from(optionals).transform(Optionals.get()).toList();
  49                 MatcherAssert.assertThat(objects, Matchers.contains(object1, object2, object3));
  50         }
  51
  52 }