src/test/java/net/pterodactylus/sone/template/ListAccessorTest.java

   1 package net.pterodactylus.sone.template;
   2
   3 import static org.hamcrest.MatcherAssert.assertThat;
   4 import static org.hamcrest.Matchers.greaterThanOrEqualTo;
   5 import static org.hamcrest.Matchers.nullValue;
   6 import static org.hamcrest.Matchers.sameInstance;
   7
   8 import java.util.Arrays;
   9 import java.util.Collections;
  10 import java.util.List;
  11
  12 import net.pterodactylus.util.template.Accessor;
  13
  14 import org.junit.Test;
  15
  16 /**
  17  * Unit test for {@link ListAccessorTest}.
  18  *
  19  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  20  */
  21 public class ListAccessorTest {
  22
  23         private final Accessor accessor = new ListAccessor();
  24
  25         @Test
  26         public void gettingARandomElementFromAnEmptyListReturnsNull() {
  27                 assertThat(accessor.get(null, Collections.emptyList(), "random"), nullValue());
  28         }
  29
  30         @Test
  31         public void gettingARandomElementFromAListOfOneWillReturnTheOneElement() {
  32                 Object object = new Object();
  33                 assertThat(accessor.get(null, Arrays.asList(object), "random"), sameInstance(object));
  34         }
  35
  36         @Test
  37         public void gettingRandomElementsFromAListTwoElementsWillReturnBothWithSomeProportion() {
  38                 Object first = new Object();
  39                 Object second = new Object();
  40                 List<?> objects = Arrays.asList(first, second);
  41                 int gotFirst = 0;
  42                 for (int i = 0; i < 10000; i++) {
  43                         if (accessor.get(null, objects, "random") == first) {
  44                                 gotFirst++;
  45                         }
  46                 }
  47                 assertThat(gotFirst, greaterThanOrEqualTo(4000));
  48         }
  49
  50 }