Unit

This post about unit testing is part of the Setting up a full stack for web testing series. Introduction A modern application is split up in many functions, classes or modules. In unit testing you test the individual components and make sure they work as specified. This contrasts with functional or integration testing where you test multiple components at once. As an example let’s assume you’re writing a web based address book. There will be functions to get a list of addresses from the database, update an address in the database, verify credentials of a user who wants to log in, etc. All of these will be tested with unit tests. A functional test on the other hand would for example test the web frontend by creating an address using the web form and then check if it can by found by the integrated search. So a functional test will rely on many of the base units. ...