Use these concise Copilot prompts to generate deterministic, maintainable unit tests covering edge cases and errors:

1) 'Generate table-driven tests for (language). Include normal, boundary, null/empty, and invalid inputs. Mock external calls; assert specific error types/messages and side effects.'

2) 'Write tests targeting error paths: simulate timeouts, dependency failures, bad input, and permission denials. Use deterministic mocks/fakes and assert exact error values.'

3) 'Produce tests with clear Arrange/Act/Assert, helper builders, descriptive names, and comments explaining each edge case.'

Compare GitHub Copilot vs Cursor for coding workflows: Compare GitHub Copilot and Cursor