Sometimes a unit test needs to do more than validate the good or correct path, what about failure scenarios? Let’s consider a search function, it returns an object when it finds what’s being requested but throws an exception when it can’t, any calling method would need to handle that exception and then behave accordingly. Here’s […]
Previously (here, here and here) we looked at users.py and how we can create a set of tests using mocks to validate it’s working as intended. The subject we were mocking in those previous examples was file_utils.py. Here’s what file_utils.py looks like; def write_file(path, content): file_to_write = open(path, "w") file_to_write.write(content) file_to_write.close() def read_file(path): with open(path, […]
Before reading this post I’d recommend reading my previous ones available here and here. In the previous tutorial we used unittest.mock to mock out our test subject’s dependencies, this simplified our tests and allowed us to focus on one piece of functionality at a time. Unfortunately the approach detailed previously has a drawback! Let’s make […]
