The parent above you didn't necessarily imply that the whole microservice was being integrated before testing it. It is reasonable that a microservice can exist

The parent above you didn't necessarily imply that the whole microservice was being integrated before testing it. It is reasonable that a microservice can exist as whole, but nonintegrated with its other deliverable components, and remains sufficiently unit-testable. It's also extremely likely that the microservice needs to be integrated to test it :)