Mastering Flask Web Development - Second Edition

Testing Flask Apps

Throughout the book, every time that we've made a modification to our application's code, we've had to manually load the affected web pages into our browser to test if the code was working correctly. As the application grows, this process becomes more and more tedious, especially if you change something that is low-level and used everywhere, such as SQLAlchemy model code.

In order to automate the process of verifying that our code works the way we want it to, we will use a built-in feature of Python that allows us to write tests, normally named unit tests or integration tests, which are checked against our application's code.

In this chapter, you will learn how to do the following:

• Writing simple tests with Python's unitest ...