Get Your Hands Dirty on Clean Architecture by Tom Hombergs.png

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This course will teach you all about creating a web application in the Hexagonal Architecture style. Hexagonal Architecture promotes the separation of concerns by encapsulating logic in different layers of the application. This enables a higher level of isolation, testability, and control over your business specific code. 

You will learn how to design software modules and complete applications in a clean and maintainable manner, while also learning how to advocate for a certain technique given your application and constraints.

By the end of this course, you will have a greater understanding of how to implement software architecture, a key skill for any senior developer.

Hexagonal Software Architecture for Web Applications

On top of the pyramid are system tests. A system test starts up the whole application and runs requests against its #key# API: Application Programming Interface #key#, verifying that all our layers work in concert. 

## Send money system test

In a system test for the "Send Money" use case, we send an #key# HTTP: Hypertext Transfer Protocol #key# request to the application and validate the response as well as the new balance of the 
account:

On top of the pyramid are system tests. A system test starts up the whole application and runs requests against its #key# API: Application Programming Interface #key#, verifying that all our layers work in concert. 

# Send money system test

In a system test for the "Send Money" use case, we send an #key# HTTP: Hypertext Transfer Protocol #key# request to the application and validate the response as well as the new balance of the 
account:

Learn how to test the main paths of your application with the help of system tests.

Before We Begin

What's Wrong with Layers?

Inverting Dependencies

Organizing Code

Implementing a Use Case

Implementing a Web Adapter

Implementing a Persistence Adapter

Testing Architecture Elements

Mapping Between Boundaries

Assembling the Application

Enforcing Architecture Boundaries

Taking Shortcuts Consciously

Assessment

Conclusion

Appendix

Testing Main Paths with System Tests

Send money system test