Gain insights into property-based testing with PropEr in Elixir. Learn foundational principles, custom data generators, and advanced concepts for effective real-world application testing.

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Property-based testing relies on specifying some property of code, unlike unit tests, which specify the expected output in response to some inputs. In this course, we'll cover the concepts we need to feel confident about using even the most advanced features of PropEr with Elixir.

We'll start with the basic and foundational principles of property-based testing, see what the framework offers us to get started, make our way through thinking in properties, write our own custom data generators, and then learn more advanced concepts. We'll also see how you can use property-based testing in a realistic project.

By the time we finish this course, we should feel comfortable testing real-world applications using properties.

Property-Based Testing with PropEr in Elixir

You now have all the knowledge required to use properties to find tricky bugs in all systems, from basic unit tests to larger integration suites. You’re ready to go on and start adding better tests to your software and improve software quality across the board. Keep practicing and enjoy!

# Summary

We went through three basic concepts of property-based testing:
1. __The basics__, which included the foundations of property-based testing, the general concepts required to write properties and generators, and the techniques used to make properties.

2. __Stateless properties__, which introduced us to stateless properties, the concepts of responsible testing, shrinking, and finally targeted properties. 

3. __Stateful properties__, which included the basics of stateful properties and FSM properties. 

Finally, we had a bookstore case study that used all the concepts that we learned to test a working project. It showed us how Property-Based testing could be used along with unit testing to get the best results possible from tests and assure us that a program's quality is not questionable. 

Take a look at a summary of the course as a whole.

Conclusion

Foundations of Property-Based Testing

Writing Properties

Thinking in Properties

Custom Generators

Responsible Testing

Properties-Driven Development

Shrinking

Stateful Properties

Case Study: Bookstore

State Machine Properties

Conclusion

Conclusion