feat: setup test outline for disappearing messages

ts/test/session/unit/disappearing/DisappearingMessage_test.ts

@@ -0,0 +1,42 @@
+import { expect } from 'chai';
+import Sinon from 'sinon';
+import { stubWindowLog } from '../../../test-utils/utils';
+
+describe('Disappearing Messages', () => {
+  stubWindowLog();
+
+  beforeEach(() => {
+    // TODO Stubbing
+  });
+
+  afterEach(() => {
+    Sinon.restore();
+  });
+
+  // ts/util/expiringMessages.ts
+  it('setExpirationStartTimestamp', async () => {
+    expect('TODO').to.be.eq('TODO');
+  });
+
+  it('changeToDisappearingMessageType', async () => {
+    expect('TODO').to.be.eq('TODO');
+  });
+
+  it('changeToDisappearingConversationMode', async () => {
+    expect('TODO').to.be.eq('TODO');
+  });
+
+  it('checkForExpireUpdateInContentMessage', async () => {
+    expect('TODO').to.be.eq('TODO');
+  });
+
+  // ts/models/conversation.ts
+  it('updateExpireTimer', async () => {
+    expect('TODO').to.be.eq('TODO');
+  });
+
+  // ts/models/message.ts
+  it('isExpirationTimerUpdate', async () => {
+    expect('TODO').to.be.eq('TODO');
+  });
+});