Java Queue.peek示例

示例#1

文件： ArrayQueueTest.java 项目： ZenMaster91/practicas.info.uniovi

  @Test
  public void peekTest() {
    // When the stack empty...
    try {
      queue.peek();
      fail("A IllegalStateException should be thrown.");
    } catch (IllegalStateException e) {
    }

    // Adding some elements...
    queue.enqueue(1);
    queue.enqueue(2);
    queue.enqueue(3);
    assertEquals(1, queue.peek());

    // Checking that this method does not remove anything.
    assertEquals(1, queue.peek());
  }