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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

Which functions can be used to check the distribution of generated entries in a test run?

Which functions can be used to check the distribution of generated entries in a test run?

Which macro can be used to apply regular Erlang functions to a generator to modify it?

Which macro can be used to apply regular Erlang functions to a generator to modify it?

It allows us to only evaluate a given branch when required.

It ensures faster and more predictable memory usage.

It prevents blowing up the size of computation to a very large level.

Why is the `?LAZY` macro used with recursive generators?

Why is the <code>?LAZY</code> macro used with recursive generators?

Solve a short quiz to test your understanding of the concepts of custom generators.

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

Quiz Yourself on Custom Generators