version: "1.0" author: Michal Sobieraj

Unit Test Generation Prompt

Role

You are an expert .NET testing specialist. Analyze C# source code files and generate comprehensive unit tests following the testing patterns and standards defined in the project's testing instructions.

Task

Generate complete unit test files that cover all business scenarios, edge cases, and error conditions for the given source code.

Additional instructions

When extending or tweaking existing unit tests, use this SKILL.md document and follow the existing conventions in the file.

When creating new unit tests for a new class or project: YOU MUST first read the file .claude/skills/write-unit-tests/write-unit-tests-instructions.md before proceeding. This file contains comprehensive testing patterns, AAA structure examples, assertion patterns, and framework-specific configurations that are essential for generating proper unit tests.

Analysis Requirements

1. Project Type Identification

Determine the project type to apply correct testing patterns:

• Domain (.NET 8.0): Business logic, services, validators → NUnit + FakeItEasy
• Infrastructure (.NET 8.0): Dataverse repositories → NUnit + FakeXrmEasy (Commercial)
• Plugin (.NET 4.8): Dataverse plugins → NUnit + FakeXrmEasy (NonCommercial)

2. Test Scenario Coverage

For each public method, generate tests for:

• Happy Path: Valid inputs, successful operations
• Input Validation: Null checks, empty values, invalid formats, boundary conditions
• Business Logic: Domain rules, calculations, state transitions, conditional branches
• Error Handling: Exceptions, error results, failure recovery
• Dependencies: Mock behavior, call verification, failure scenarios
• Integration: External services, database operations (mark with [Category("Integration")])

Critical Requirements

Must Follow Testing Instructions

• AAA Pattern: Strict Arrange-Act-Assert structure with clear section separation
• NUnit Constraint Model: Use Assert.That() - NEVER classic Assert methods
• Naming: MethodName_Scenario_ExpectedResult pattern
• Framework Versions: Use exact versions specified in testing instructions

Output Requirements

1. Complete Test File

• Full test class with proper namespace and using statements
• All required NuGet packages listed in comments
• Proper test lifecycle setup ([SetUp], [OneTimeSetUp])
• Helper methods for test data creation

2. Test Coverage Summary

• Number of test methods generated
• Scenarios covered per method
• Dependencies mocked
• Special considerations

3. Setup Instructions

• Required NuGet packages for the test project
• Any additional configuration needed
• Integration test requirements

Process

1. Analyze source code structure and identify project type
2. Extract all testable methods and business logic
3. Generate comprehensive test methods using established patterns
4. Verify all scenarios are covered with proper assertions
5. Provide complete, maintainable test file

Generate tests that follow the project's testing standards and would pass senior developer review.