Gain insights into property-based testing with PropEr in Erlang. Delve into foundational principles, common frameworks, custom data generators, and applying testing in realistic projects for robust code validation.

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Property-based testing relies on specifying some property of code, rather than unit tests which specify the expected output in response to some inputs. In this course, you’ll cover the concepts you need to get started, up to the point where you feel confident enough to use the most advanced features of PropEr with Erlang.

You’ll start smoothly with the basic and foundational principles of property-based testing. From there, you will cover some of the common frameworks, how to think in properties, how to write your own custom data generators, and more. You'll also see how you can use Property-Based Testing in a realistic project.

By the time you finish this course, you will be comfortable testing real-world applications using properties.

Property-Based Testing with PropEr in Erlang

# Summary

We’ve now gone through a little bit of an overview of what property-based testing asks of us and offers in return and have things working in a typical project structure for Erlang. We have our toolbox in order. Even though we’ve successfully run a property (and over 10,000 tests), chances are we’re not quite at a point where you feel like you understand what goes on in the framework and how we could write arbitrary properties.

# What's next
That’s fine, though, because the next chapter will get us there. We’ll look into the specific format of properties, how we can tell the framework what data to generate for them, how to interpret test results, and so on.

Here's a summary of what we learned in this chapter.

Wrapping Up

Foundations of Property-Based Testing

Writing Properties

Thinking in Properties

Custom Generators

Responsible Testing

Properties-Driven Development

Shrinking

Targeted Properties

Stateful Properties

Case Study: Bookstore

State Machine Properties

Conclusion

Wrapping Up

Summary