if (value == null) {
        statsCounter.recordMisses(1);
        return null;
      }
      if (!isExpired(value)) {
        statsCounter.recordHits(1);
        value.updateTimestamp();
        return value.getValue();
      }

      statsCounter.recordEviction();
      statsCounter.recordMisses(1);
      cachingHashMap.remove(key);
    }
    // `key` was in the cache, so it's a K.

    assertThat(response2.body.string()).isEqualTo("A")
    assertThat(response2.header("Allow")).isEqualTo("GET, HEAD")
    val updatedTimestamp = response2.receivedResponseAtMillis
    assertThat((updatedTimestamp - t1).toDouble()).isCloseTo(0.0, 250.0)

    // A full cache hit reads the cache.
    Thread.sleep(10)
    val response3 = get(server.url("/a"))