xUnit.net - Quick Reference Deep Knowledge : Use with technology: for comprehensive documentation. Basic Tests Theory (Parameterized Tests) Mocking with Moq Mocking with NSubstitute Fixtures (Shared Context) FluentAssertions (Optional) Anti-Patterns | Anti-Pattern | Why It's Bad | Correct Approach | |--------------|--------------|------------------| | Testing implementation details | Brittle tests | Test behavior | | Shared mutable state | Flaky tests | Use fresh fixtures per test | | No assertion message | Hard to debug | Use descriptive assertions | | Testing private methods | Coupling to i…