A recent project to repair the unit test, I am a little rejection, feel a waste of time, deployed to the server, run again not faster?

Simply include calculation, I can understand, and write a Main method to run again about

But a lot of calls the external services, and to write a lot, but also human control as a result, wouldn't it be easier to go wrong, to the results of this test really useful T_T

Don't understand ah T_T
Clearly faster deployment up to test, test results is also the most complete