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.allOf;
   5 import static org.hamcrest.Matchers.greaterThanOrEqualTo;
   6 import static org.hamcrest.Matchers.lessThanOrEqualTo;
   7 import static org.hamcrest.Matchers.nullValue;
   8 import static org.hamcrest.Matchers.sameInstance;
   9
  10 import java.util.Arrays;
  11 import java.util.Collections;
  12 import java.util.List;
  13
  14 import net.pterodactylus.util.template.Accessor;
  15
  16 import org.junit.Test;
  17
  18 /**
  19  * Unit test for {@link ListAccessorTest}.
  20  *
  21  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  22  */
  23 public class ListAccessorTest {
  24
  25         private final Accessor accessor = new ListAccessor();
  26
  27         @Test
  28         public void gettingARandomElementFromAnEmptyListReturnsNull() {
  29                 assertThat(accessor.get(null, Collections.emptyList(), "random"), nullValue());
  30         }
  31
  32         @Test
  33         public void gettingARandomElementFromAListOfOneWillReturnTheOneElement() {
  34                 Object object = new Object();
  35                 assertThat(accessor.get(null, Arrays.asList(object), "random"), sameInstance(object));
  36         }
  37
  38         @Test
  39         public void gettingRandomElementsFromAListTwoElementsWillReturnBothWithSomeProportion() {
  40                 Object first = new Object();
  41                 Object second = new Object();
  42                 List<?> objects = Arrays.asList(first, second);
  43                 int gotFirst = 0;
  44                 for (int i = 0; i < 10000; i++) {
  45                         if (accessor.get(null, objects, "random") == first) {
  46                                 gotFirst++;
  47                         }
  48                 }
  49                 assertThat(gotFirst, allOf(greaterThanOrEqualTo(4000), lessThanOrEqualTo(6000)));
  50         }
  51
  52 }