when {
      value != null -> LinkedTags(key, value, this)
      else -> this
    }

  override fun <T : Any> get(key: KClass<T>): T? = null

  override fun toString() = "{}"
}

/**
 * An invariant of this implementation is that [next] must not contain a mapping for [key].
 * Otherwise, we would have two values for the same key.
 */
private class LinkedTags<K : Any>(
  private val key: KClass<K>,

    assertThat(cache.size()).isEqualTo(1);
    assertThat(cache.getUnchecked("b")).isEqualTo("b");
  }

  // "Basher tests", where we throw a bunch of stuff at a LoadingCache and check basic invariants.

  /**
   * This is a less carefully-controlled version of {@link #testRemovalNotification_clear} - this is
   * a black-box test that tries to create lots of different thread-interleavings, and asserts that

     */
    static boolean hashFloodingDetected(@Nullable Object[] hashTable) {
      int maxRunBeforeFallback = maxRunBeforeFallback(hashTable.length);
      int mask = hashTable.length - 1;

      // Invariant: all elements at indices in [knownRunStart, knownRunEnd) are nonnull.
      // If knownRunStart == knownRunEnd, this is vacuously true.
      // When knownRunEnd exceeds hashTable.length, it "wraps", detecting runs around the end

    assertIntact(q);
    assertThat(result).containsExactly(1, 15, 13, 8, 14);
  }

  /**
   * This tests a special case of the removeAt() call. Moving an element sideways on the heap could
   * break the invariants. Sometimes we need to bubble an element up instead of trickling down. See
   * implementation.
   */
  public void testInvalidatingRemove() {
    MinMaxPriorityQueue<Integer> mmHeap = MinMaxPriorityQueue.create();

- Introduced end-to-end tests to verify component invariant metrics across the entire test suite. ([#133394](https://github.com/kubernetes/kubernetes/pull/133394), [@BenTheElder](https://github.com/BenTheElder))
- Introduced new kubelet metrics for the Ensure Secret Pulled Images KEP, including: