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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propert-based-testing.tar.gz

Erlang

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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

# Code

To run the shell, we’ll use the command `rebar3 shell`. With this, the shell will start running and we can test the functions that we have created. 

Let's start off with a few basic functions:

1. `bookstore_db:setup().`
2. `bookstore_db:add_book("978-0-7546-7834-2", "Behind Human Error", "David D Woods").`
3. `bookstore_db:find_book_by_author("Woods").`
4. `bookstore_db:teardown().`

Take a look at how to start the application and test the functionality in the shell. 

The Application: Running the Code

Take a look at how to start the application and test the functionality in the shell.

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

The Application: Running the Code

Code