Timeline: repair oldest/newest metrics if we fetch nothing

ts/test-node/util/ringrtc/nonRenderedRemoteParticipant_test.ts

@@ -0,0 +1,16 @@
+// Copyright 2020 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import { assert } from 'chai';
+
+import { nonRenderedRemoteParticipant } from '../../../util/ringrtc/nonRenderedRemoteParticipant';
+
+describe('nonRenderedRemoteParticipant', () => {
+  it('returns a video request object a width and height of 0', () => {
+    assert.deepEqual(nonRenderedRemoteParticipant({ demuxId: 123 }), {
+      demuxId: 123,
+      width: 0,
+      height: 0,
+    });
+  });
+});