Unit Testing in Visual Studio 2022 (UTVS2022) — Lesson 2: Assertions, Data-Driven Tests, Boundaries, and Dependency Isolation

Topics Covered

• Use assertions for values, exceptions, collections, and object state
• Parameterize tests and cover representative normal, boundary, and failure cases
• Isolate dependencies with interfaces, fakes, stubs, and mocking concepts
• Step-by-step implementation workflow and configuration decisions
• Hands-on verification of core features, data, and expected results
• Documentation of assumptions, dependencies, naming, and change controls

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

Expand coverage with parameterized cases and an isolated external dependency.

• 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 Assertions, Data-Driven Tests, Boundaries, and Dependency Isolation within a realistic Unit Testing in Visual Studio 2022 (UTVS2022) scenario and support the result with validation evidence.