doneSignal.await();

    assertThat(callCount.get()).isEqualTo(1);
    assertThat(result.get(0)).isEqualTo("barfoo");
    assertThat(result.get(1)).isEqualTo("barfoo");
    assertThat(result.get(2)).isEqualTo("barfoo");
    assertThat(cache.getUnchecked(key)).isEqualTo("barfoo");
  }

  // Test ignored because it is extremely flaky in CI builds

  }

  public void testRemoveFromStringHeap() {
    MinMaxPriorityQueue<String> mmHeap =
        rawtypeToWildcard(MinMaxPriorityQueue.expectedSize(5)).create();
    Collections.addAll(mmHeap, "foo", "bar", "foobar", "barfoo", "larry", "sergey", "eric");
    assertTrue("Heap is not intact initially", mmHeap.isIntact());
    assertEquals("bar", mmHeap.peek());
    assertEquals("sergey", mmHeap.peekLast());
    assertEquals(7, mmHeap.size());

    doneSignal.await();

    assertThat(callCount.get()).isEqualTo(1);
    assertThat(result.get(0)).isEqualTo("barfoo");
    assertThat(result.get(1)).isEqualTo("barfoo");
    assertThat(result.get(2)).isEqualTo("barfoo");
    assertThat(cache.getUnchecked(key)).isEqualTo("barfoo");
  }

  // Test ignored because it is extremely flaky in CI builds

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