public async Task GetTickerData_CallsTickerClient_ToGetTickerData() { //Arrange _tickerClient.Setup(x => x.GetTickerData()).ReturnsAsync(new HttpResponseMessage { StatusCode = HttpStatusCode.OK, Content = new StringContent(ClientData.TickerResponseContent, System.Text.Encoding.UTF8, "application/json") }); //Act var result = await _service.GetTickerData(); //Assert _tickerClient.Verify(x => x.GetTickerData(), Times.Once); }