@CollectionFeature.Require(absent = SUPPORTS_ADD)
  public void testSetCount_oneToThree_unsupported() {
    assertSetCountIncreasingFailure(e3(), 3);
  }

  // Unconditional setCount size decreases:

  @CollectionSize.Require(absent = ZERO)
  @CollectionFeature.Require(SUPPORTS_REMOVE)
  public void testSetCount_oneToZero_supported() {
    assertSetCount(e0(), 0);
  }

  @CollectionFeature.Require(absent = SUPPORTS_ADD)
  public void testSetCount_oneToThree_unsupported() {
    assertSetCountIncreasingFailure(e3(), 3);
  }

  // Unconditional setCount size decreases:

  @CollectionSize.Require(absent = ZERO)
  @CollectionFeature.Require(SUPPORTS_REMOVE)
  public void testSetCount_oneToZero_supported() {
    assertSetCount(e0(), 0);
  }

- Memory limits could be decreased with a `NotRequired` resize restart policy. When decreasing memory limits,a best-effort check was performed to prevent limits from decreasing below usage and triggering an OOM-kill. ([#133012](https://github.com/kubernetes/kubernetes/pull/133012),...

- InPlacePodVerticalScaling: Memory limits cannot be decreased unless the memory resize restart policy is set to `RestartContainer`. Container resizePolicy is no longer mutable. ([#130183](https://github.com/kubernetes/kubernetes/pull/130183), [@tallclair](https://github.com/tallclair)) [SIG Apps and Node]

	initial := timeout.Timeout()

	for range dynamicTimeoutLogSize {
		timeout.LogSuccess(20 * time.Second)
	}

	adjusted := timeout.Timeout()

	if initial <= adjusted {
		t.Errorf("Failure to decrease timeout, expected %v to be less than %v", adjusted, initial)
	}
}

func TestDynamicTimeoutDualDecrease(t *testing.T) {
	timeout := newDynamicTimeout(time.Minute, time.Second)

	initial := timeout.Timeout()

- Number of errors reported to the metric `storage_operation_duration_seconds_count` for emptyDir decreased significantly because previously one error was reported for each projected volume created. ([#117022](https://github.com/kubernetes/kubernetes/pull/117022), [@mpatlasov](https://github.com/mpatlasov)) [SIG Storage]

	isClosed = rlk.IsClosed()
	if isClosed {
		t.Fatal("File ref count shouldn't be zero")
	}

	// Decrease reference count by 1.
	if err = rlk.Close(); err != nil {
		t.Fatal(err)
	}

	isClosed = rlk.IsClosed()
	if isClosed {
		t.Fatal("File ref count shouldn't be zero")
	}

	// Decrease reference count by 1.
	if err = rlk.Close(); err != nil {
		t.Fatal(err)
	}

	// Now file should be closed.

- Number of errors reported to the metric `storage_operation_duration_seconds_count` for emptyDir decreased significantly because previously one error was reported for each projected volume created. ([#117022](https://github.com/kubernetes/kubernetes/pull/117022), [@mpatlasov](https://github.com/mpatlasov)) [SIG Storage]

  public void testRemove_present() {
    int initialSize = collection.size();
    assertTrue("remove(present) should return true", collection.remove(e0()));
    assertEquals(
        "remove(present) should decrease a collection's size by one.",
        initialSize - 1,
        collection.size());
    expectMissing(e0());
  }

  @CollectionFeature.Require({SUPPORTS_REMOVE, FAILS_FAST_ON_CONCURRENT_MODIFICATION})

  public void testRemove_present() {
    int initialSize = collection.size();
    assertTrue("remove(present) should return true", collection.remove(e0()));
    assertEquals(
        "remove(present) should decrease a collection's size by one.",
        initialSize - 1,
        collection.size());
    expectMissing(e0());
  }

  @CollectionFeature.Require({SUPPORTS_REMOVE, FAILS_FAST_ON_CONCURRENT_MODIFICATION})