Unit Testing in Visual Studio 2022 (UTVS2022) — Lesson 3: Debugging, Async Tests, Coverage, and Test Maintainability

Topics Covered

• Test asynchronous code, exceptions, and state transitions
• Use Test Explorer, filtering, grouping, playlists, and diagnostics
• Debug failing tests and distinguish product defects from test defects
• Security, reliability, performance, support, and operational controls
• Common failure patterns, diagnostic evidence, and root-cause analysis
• Corrective actions, rollback considerations, and reusable runbook updates

Guided Practice Steps

1. Translate the lesson requirement into a clear Unit Testing in Visual Studio 2022 (UTVS2022) implementation or analysis objective.
2. Document assumptions, selected tools or features, dependencies, risks, and expected results.
3. Perform the guided task, capture evidence, and compare the result with the acceptance criteria.
4. Record issues, corrective actions, and a reusable operational or development note.

Practical Activity

Debug flaky and failing tests, then refactor the suite for deterministic execution.

• Define the scenario, inputs, constraints, and expected outcome.
• Complete the activity and preserve screenshots, outputs, logs, code, or decision evidence.
• Review the result, identify gaps, and document corrective or improvement actions.

Validation Checklist

• The stated requirement and expected outcome are clear.
• Configuration, code, data, or design decisions are documented.
• Normal, boundary, failure, security, and operational considerations are reviewed.
• Evidence supports the conclusion and the next action is prioritized.

Lesson Outcome

Learners can explain and apply Debugging, Async Tests, Coverage, and Test Maintainability within a realistic Unit Testing in Visual Studio 2022 (UTVS2022) scenario and support the result with validation evidence.