> I have worked on codebases where full coverage was obtained using service level tests in a proper pipeline.
Sounds ideal to me. Add testing where it is cheap enough to justify, and maybe just a little more than you think you really need because they pay off so often.
If your mocks and fixtures get too big you might not be testing the code in question meaningfully.
Coverage and test quality/quantity need to scale with the associated risk. Perhaps "Flight planner for Air Force Weather" gets more testing than "Video game User Interface" and that's ok. Even in gaming, the engine team should have more tests than the game teams.
Sounds ideal to me. Add testing where it is cheap enough to justify, and maybe just a little more than you think you really need because they pay off so often.
If your mocks and fixtures get too big you might not be testing the code in question meaningfully.
Coverage and test quality/quantity need to scale with the associated risk. Perhaps "Flight planner for Air Force Weather" gets more testing than "Video game User Interface" and that's ok. Even in gaming, the engine team should have more tests than the game teams.