Java CollectionUtils.hasUniqueObject Examples

Example #1

File: CollectionUtilsTests.java Project: Canpliy/spring-framework

  @Test
  public void testHasUniqueObject() {
    List<String> list = new LinkedList<>();
    list.add("myElement");
    list.add("myOtherElement");
    assertFalse(CollectionUtils.hasUniqueObject(list));

    list = new LinkedList<>();
    list.add("myElement");
    assertTrue(CollectionUtils.hasUniqueObject(list));

    list = new LinkedList<>();
    list.add("myElement");
    list.add(null);
    assertFalse(CollectionUtils.hasUniqueObject(list));

    list = new LinkedList<>();
    list.add(null);
    list.add("myElement");
    assertFalse(CollectionUtils.hasUniqueObject(list));

    list = new LinkedList<>();
    list.add(null);
    list.add(null);
    assertTrue(CollectionUtils.hasUniqueObject(list));

    list = new LinkedList<>();
    list.add(null);
    assertTrue(CollectionUtils.hasUniqueObject(list));

    list = new LinkedList<>();
    assertFalse(CollectionUtils.hasUniqueObject(list));
  }