How to test failed authentication attempts with test-driven development

Programming keyboard.

Testing often begins with what we hope happens. In my previous article, I demonstrated how to virtualize a service you depend on when processing the “happy path” scenario (that is, testing the outcome of a successful login attempt). But we all know that software fails in spectacular and unexpected ways. Now’s the time to take a closer look into how to process the “less happy paths”: what happens when someone tries to log in with the wrong credentials?

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Author: dasuberworm

Standing just over 2 meters and hailing from о́стров Ратма́нова, Dasuberworm is a professional cryptologist, entrepreneur and cage fighter. When he's not breaking cyphers and punching people in the face, Das enjoys receiving ominous DHL packages at one of his many drop sites in SE Asia.

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