assertThat(map.put("One", "11"), is("1"));
        assertThat(map.get("one"), is("11"));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testRemove() throws Exception {
        assertThat(map.remove("ONE"), is("1"));
        assertThat(map.size(), is(1));
        assertThat(map.remove("dummy"), is(nullValue()));
    }

    /**
     * @throws Exception

            assertTrue(EVEN.apply(toAdd));
          } catch (IllegalArgumentException e) {
            assertFalse(EVEN.apply(toAdd));
          }
        }
      }
    }

    public void testRemove() {
      for (List<Integer> contents : SAMPLE_INPUTS) {
        for (int toRemove = 0; toRemove < 10; toRemove++) {
          assertEquals(
              contents.contains(toRemove) && EVEN.apply(toRemove),

        assertThat(list.contains("2"), is(not(true)));
        assertThat(list.contains(null), is(not(true)));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testRemove() throws Exception {
        list.addLast(null);
        list.addLast("1");
        list.addLast("2");
        assertThat(list.remove("3"), is(not(true)));
        assertThat(list.remove("1"), is(true));

     * map.remove(x)} returns the same value which {@code map.get(x)} did immediately beforehand.
     */
    @Override
    public void testRemove() {
      Map<String, Map<Integer, Character>> map;
      try {
        map = makePopulatedMap();
      } catch (UnsupportedOperationException e) {
        return;
      }

    } else {
      assertThrows(UnsupportedOperationException.class, () -> map.putAll(mapToPut));
    }
    assertEquals(initialSize, map.size());
    assertInvariants(map);
  }

  public void testRemove() {
    Map<K, V> map;
    try {
      map = makePopulatedMap();
    } catch (UnsupportedOperationException e) {
      return;
    }
    K keyToRemove = map.keySet().iterator().next();

    assertEquals(3, (int) mmHeap.peek());
    assertEquals(3, (int) mmHeap.poll());
    assertNull(mmHeap.peekLast());
    assertNull(mmHeap.peek());
    assertNull(mmHeap.poll());
  }

  public void testRemove() {
    MinMaxPriorityQueue<Integer> mmHeap = MinMaxPriorityQueue.create();
    mmHeap.addAll(Lists.newArrayList(1, 2, 3, 4, 47, 1, 5, 3, 0));
    assertTrue("Heap is not intact initially", mmHeap.isIntact());