Unit to make fake requests using a component with the same interface as the real The unit, so does not make real network requests. By definition, a unit test does not include systems outside For example, a unit that retrieves data from an HTTP API depends onĪn HTTP client.

Situations where the unit you are testing depends on some component outside of If you write tests for non-trivial units, you have encountered The dependency context and built-in fakeryĭependency injection mechanism What is dependency injection and why should I care?.Injecting a class that always produces the same object.Injecting a dependency with Twin Sister.(requests, requests_stub)Įxpect(self.post_spy).to(equal(content)) Requests_stub = EndlessFake(pattern_obj=requests) Test_post_something.py from unittest import TestCaseįrom twin_sister import open_dependency_contextįrom twin_sister.fakes import EndlessFake, FunctionSpyįrom post_something import post_something

(or anything else that suits your fancy). Library of test doubles and a pure Python dependency injector to deliver them Read without doing violence to the system-under-test. Its goal is to make unit tests easier to write and easier to Was released as open source in 2017 and has been in continuous and expanding Initially an internal project at ProtectWise in 2016, it To cover the unit's interactions with external components.Įnter Twin Sister. Other hand, writing good unit tests can be hard - especially when they need Would be a Good Thing if those tests were legible enough to show what your codeĭoes and effective enough to tell you when you've broken something. 'code without tests,' you know that you should write unit tests and that it Whether or not you accept Michael Feathers's definition of 'legacy code' as

No, I am Zoot's identical twin sister, Dingo. Twin Sister: A Unit Testing Toolkit with Pure Python Dependency Injection

Project brutality 3.0 test