public async Task TimelineLinkEvent() { var mock = new Mock <ITimelineService>(); TimelineEvent timelineEvent = new TimelineEvent(); timelineEvent.Id = "IDE1"; await timelineEvent.LinkEventAsync(mock.Object, "ID1"); mock.Verify(m => m.PutJsonAsync("Timeline/LinkEvent", It.Is <object>(o => o.VerifyObject("TimelineId", "ID1") && o.VerifyObject("EventId", "IDE1")))); }