m.Set(barID, Failure, pod)
	expectUpdate(Update{barID, Failure, pod.UID}, "new failure")

	// Unchanged results should not send an update.
	m.Set(fooID, Success, pod)
	expectNoUpdate("unchanged foo")

	m.Set(barID, Failure, pod)
	expectNoUpdate("unchanged bar")

	// Changed results should send an update.
	m.Set(fooID, Failure, pod)
	expectUpdate(Update{fooID, Failure, pod.UID}, "changed foo")

	m.Set(barID, Success, pod)

		expectInvalidObjErr bool
		expectNoUpdate      bool
		transformStale      bool
		hasSelfLink         bool
	}{{
		name:                "non-existing key, ignoreNotFound=false",
		key:                 "/non-existing",
		ignoreNotFound:      false,
		precondition:        nil,
		expectNotFoundErr:   true,
		expectInvalidObjErr: false,
		expectNoUpdate:      false,
	}, {