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Functional REST API testing in ASP.NET Core

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The document discusses functional REST API testing in ASP.NET Core, highlighting common pitfalls such as incorrect API routing and the importance of testing various aspects like API contracts, resource access, and response formats. It suggests using modern tools and frameworks, including self-hosting the API during tests, and emphasizes the separation of unit tests from business logic tests. The document concludes by advocating for rigorous testing practices to ensure API reliability.

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Functional REST API testing in ASP.NET Core
Does anyone know why the API isnโ€™t working anymore?
Because api/product/1 is not the same as api/products/1
SystemTests Integration Unit
FunctionalTests
How to test controllers and actions
How to test controllers and actionsโ€ฆ Not!
What we DO want to test โ€ข The API contract โ€ข Resource access (routing) โ€ข Accepted verbs โ€ข Response codes โ€ข Response format/representation โ€ข API versioning and backwards compatibility โ€ข Validation โ€ข Access control
How it used to be back in the day
Nancy had the right ideea
But we just usedWebApi and Postman
WebApi self hosting with HttpSelfHostServer
Why not start a host and server the API during tests?
Functional REST API testing in ASP.NET Core
OWIN, Katana andTestServer
Nowadays โ€“ ASP.NET Core 2.1
Pick your testing framework
Add some nuget packages
Start writing tests (DEMO) https://github.com/sdamian/RestApiTestingDemo
Separate the API (unit) tests from your business logic tests
Friends donโ€™t let friends use untested APIโ€™s
Thank you!

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Functional REST API testing in ASP.NET Core

Editor's Notes

  • #3: I โ€žfixedโ€ some resource names Oops I donโ€™t remember changing that Typing in the wrong window
  • #11: htps://github.com/NancyFx/Nancy/wiki/Testing-your-application
  • #16: Open web interface for dotnet Katana was Microsoftโ€™s implementation that eventually evolved into asp.net core
  • #19: The extension methods are in microsoft.aspnet.webapi.client
  • #21: If you want isolated โ€unitโ€ tests