How to cover the project with tests?

Question

Software testing

There is a project on Laravel that interacts (mostly pulls data, passes authentication / authorization ...) with a REST service (based on Laravel and Passport). How to properly cover it with tests? What types of tests are generally better to write for such a project? Share your experience and opinions.

Answer 1

It is necessary to lock the rest service so that it always responds with a data set known in advance in the test, and test the logic.