Data: { streamId: firstTypingActivityId, streamSequence: 3, streamType: 'streaming' },
          from: { id: 'u-00001', name: 'Bot', role: 'bot' },
          id: 't-00003',
          text: 'A quick brown fox jumped over',
          timestamp: 3,
          type: 'typing'
        });

        // THEN: Should display 2 messages.
        await pageConditions.numActivitiesShown(2);
        expect(pageElements.typingIndicator()).toBeFalsy();
        expect(pageElements.activityContents()[0]).toHaveProperty(
     