This file is a "navigation hub" that helps find the correct sub-skill. Sub-skills contain detailed code examples, best practices, and common pitfalls. Loading the correct sub-skill ensures users receive the most complete guidance.
Match the corresponding sub-skill based on user needs, load it using the Skill tool, and let the sub-skill provide professional testing guidance.
Quick Skill Reference Table
Keywords mentioned by the user → Sub-skill to load
Most Commonly Used Skills
| User says... | Load command | Purpose description |
|---|---|---|
| Validator, validator, CreateUserValidator | /skill dotnet-testing-fluentvalidation-testing |
FluentValidation testing |
| Mock, mocking, IRepository, IService | /skill dotnet-testing-nsubstitute-mocking |
Mock external dependencies |
| AutoFixture, test data generation | /skill dotnet-testing-autofixture-basics |
Automatically generate test data |
| Assertions、Should()、BeEquivalentTo | /skill dotnet-testing-awesome-assertions-guide |
Fluent assertions (must-learn) |
| DateTime, time testing, TimeProvider | /skill dotnet-testing-datetime-testing-timeprovider |
Time-related testing |
| File, file system, IFileSystem | /skill dotnet-testing-filesystem-testing-abstractions |
File system testing |
| Bogus, fake data, Faker | /skill dotnet-testing-bogus-fake-data |
Realistic data generation |
| Builder Pattern、WithXxx | /skill dotnet-testing-test-data-builder-pattern |
Test Data Builder |
| Deep comparison, DTO comparison, Excluding | /skill dotnet-testing-complex-object-comparison |
Complex object comparison |
Foundational Introductory Skills
| User says... | Load command | Purpose description |
|---|---|---|
| From scratch, testing fundamentals, FIRST principles | /skill dotnet-testing-unit-test-fundamentals |
Unit testing fundamentals |
| Test naming, how to name tests | /skill dotnet-testing-test-naming-conventions |
Naming conventions |
| Create test project, xUnit setup | /skill dotnet-testing-xunit-project-setup |
Project setup |
Advanced Skill Combinations
| User says... | Load command | Purpose description |
|---|---|---|
| AutoFixture custom rules | /skill dotnet-testing-autofixture-customization |
ISpecimenBuilder customization |
| AutoFixture + Bogus | /skill dotnet-testing-autofixture-bogus-integration |
Automation + realistic data |
| AutoFixture + NSubstitute | /skill dotnet-testing-autofixture-nsubstitute-integration |
Automatically create Mocks |
| AutoData, Theory testing | /skill dotnet-testing-autodata-xunit-integration |
Parameterized testing |
| Test output, ITestOutputHelper | /skill dotnet-testing-test-output-logging |
Test logging |
| Coverage, Coverlet | /skill dotnet-testing-code-coverage-analysis |
Code coverage |
Usage Flow Example
使用者：請幫我建立 CreateUserValidator 的測試
AI：我注意到您需要測試 Validator。根據快速對照表，
我應該載入 dotnet-testing-fluentvalidation-testing skill。
[使用 Skill tool 載入子技能]
AI：現在按照 FluentValidation Testing skill 的指引為您建立測試...
Complete Skill List
To view the complete list of 19 foundational skills, detailed decision tree, and learning path recommendations, please continue reading the subsequent content of this file.
Quick Decision Tree
Where should I start?
Scenario 1: Complete beginner, has never written tests
Recommended learning path：
dotnet-testing-unit-test-fundamentals- Understand FIRST principles and the 3A Patterndotnet-testing-test-naming-conventions- Learn naming conventionsdotnet-testing-xunit-project-setup- Create your first test project
Why learn this way：
- The FIRST principles are the foundation of all testing; establish the correct concepts first
- Naming conventions make tests easy to read and maintain
- Get hands-on and create a project, turning theory into practice
Scenario 2: You can write basic tests, but preparing test data is very troublesome
Recommended skills (choose one or combine)：
Option A - Automation first
→ dotnet-testing-autofixture-basics
Suitable for: needing large amounts of test data and reducing boilerplate code
Option B - Realistic data first
→ dotnet-testing-bogus-fake-data
Suitable for: needing realistic test data (names, addresses, Email, etc.)
Option C - Semantic clarity first
→ dotnet-testing-test-data-builder-pattern
Suitable for: needing high readability and clearly expressing test intent
Option D - Both
→ dotnet-testing-autofixture-basics + dotnet-testing-autofixture-bogus-integration
Suitable for: needing both automation and realistic data
Scenario 3: There are external dependencies (databases, APIs, third-party services) that need to be simulated
Recommended skill combination：
dotnet-testing-nsubstitute-mocking- NSubstitute Mock framework basicsdotnet-testing-autofixture-nsubstitute-integration- (Optional) Integrate AutoFixture with NSubstitute
When you need the second skill：
- If you are already using AutoFixture to generate test data
- Want to automatically create Mock objects and reduce manual setup
Scenario 4: There are special scenarios in testing
Time-related testing
→ dotnet-testing-datetime-testing-timeprovider
Handling: DateTime.Now, time zone conversion, time calculations
File system testing
→ dotnet-testing-filesystem-testing-abstractions
Handling: file reading and writing, directory operations, path handling
Private/internal member testing
→ dotnet-testing-private-internal-testing
Handling: need to test private and internal members (but should be used with caution)
Scenario 5: You need a better assertion approach
Basic need - fluent assertions
→ dotnet-testing-awesome-assertions-guide
All projects should use this to improve test readability
Advanced need - complex object comparison
→ dotnet-testing-complex-object-comparison
Handling: deep object comparison, DTO validation, Entity comparison
Validation rule testing
→ dotnet-testing-fluentvalidation-testing
Handling: testing FluentValidation validators
Scenario 6: You want to understand test coverage
→ dotnet-testing-code-coverage-analysis
Learn: use Coverlet to analyze code coverage and generate reports
Skill classification map
Divide the 19 foundational skills into 7 major categories (testing fundamentals, test data generation, test doubles, assertion validation, special scenarios, test metrics, framework integration), each containing a skill comparison table, learning path, and code examples.
For details, please refer to references/skill-classification-map.md
Common task mapping table
Provides skill combination recommendations, implementation steps, and prompt examples for 7 common testing tasks (building a project from scratch, service dependency testing, time logic testing, etc.).
For details, please refer to references/task-mapping-table.md
Learning path suggestions
Plan daily learning schedules for a beginner path (1-2 weeks) and an advanced path (2-3 weeks), including skills, learning focus, and hands-on exercises.
For details, please refer to references/learning-paths.md
Guided conversation examples
Show how AI interacts with you to help you choose the right skills, including 4 common conversation scenarios: beginner onboarding, handling dependencies, specific problems, and improving tests.
For details, please refer to references/conversation-examples.md
Relationship with advanced skills
After completing the foundational skills, if you need to perform integration testing, API testing, containerized testing, or microservices testing, please refer to:
Advanced Integration Testing → dotnet-testing-advanced
- ASP.NET Core Integration Testing
- Containerized Testing (Testcontainers)
- Microservices Testing (.NET Aspire)
- Test Framework Upgrade and Migration
Output Format
- Recommend specific sub-skill names and load commands based on user needs
- Provide a brief rationale explaining why that skill was chosen
- If multiple skills are combined, list the recommended learning order
Related Resources
Original Data Sources
-
iThome Ironman Series Articles：An Old-School Software Engineer's Testing Training - 30-Day Challenge 2025 iThome Ironman Software Development Group Champion
-
Complete Sample Code：30Days_in_Testing_Samples Executable code containing all sample projects
Learning Documentation
This skill set is distilled from the following complete teaching materials:
-
Agent Skills: From Architecture Design to Practical Application (docs/Agent_Skills_Mastery.pdf) A complete coverage of Agent Skills from theory to practice
-
Claude Code Skills: Turning AI into a Professional Craftsman (docs/Agent_Skills_Architecture.pdf) An in-depth analysis of Agent Skills' architecture design
-
.NET Testing: Write Better, Run Faster (docs/NET_Testing_Write_Better_Run_Faster.pdf) Test execution optimization and debugging techniques
Next Steps
Choose a skill that meets your needs to start learning, or tell me your specific situation, and I will recommend the most suitable learning path!
Quick Start：
- Beginner → Start with
dotnet-testing-unit-test-fundamentalsto begin - Experienced → Tell me the specific problem you are encountering
- Not sure → Tell me about your project situation, and I will help you analyze it