# UseCase Pattern

> UseCase Pattern in the Mobile Action Pro course.

- URL: https://dantech.academy/en/courses/kotlin-accelerator/engineer-builder/06-clean-architecture/lesson-06-usecase-pattern
- Course: [Mobile Action Pro](https://dantech.academy/en/courses/kotlin-accelerator.md)
- Module: Clean Architecture in Depth
- Duration: 25 min
- Difficulty: intermediate
- Access: Enrolled students
- Tiếng Việt: https://dantech.academy/courses/kotlin-accelerator/engineer-builder/06-clean-architecture/lesson-06-usecase-pattern.md

## Objectives

- Write use cases following the convention in UseCase's KDoc: one user intention
- Choose the right shape: extend UseCase, several parameters, return a Flow, several functions
- Bind use cases in SharedDomainModule and test them with hand-written fakes in commonTest

## In this lesson

1. Lesson Goal
2. Part 1: The Convention Lives In The KDoc
3. Part 2: Four Shapes In The Repo
4. Part 3: A Use Case That Orchestrates Several Ports
5. Part 4: Wiring At The Composition Root
6. Part 5: Test With Hand-Written Fakes
7. Practice Exercise
8. Code Reading Path
9. Signs To Avoid
10. References
11. Key Points

## Study with an AI agent

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- [Join the course](https://dantech.academy/en/kotlin-accelerator/checkout)

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