Gain insights into good testing practices in Ruby on Rails. Learn the testing mindset, convert requirements into user stories, and master feature, request, and unit tests for comprehensive coverage.

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This course aims to teach you how to write better Rails applications by applying good testing practices. You’ll learn about the reasoning behind testing and the process of applying good testing practices. 

In the first half of the course, you’ll learn about the testing mindset and understand its importance. Next, you’ll learn to turn business requirements into user stories. These user stories will become the basis of the code and tests you’ll write.

Once you understand the reasoning and process, you’ll proceed to write the actual tests. You’ll test what is most important to the end user first. So, the first set of tests you’ll learn to write will be feature tests. Finally, you’ll learn to write request tests and unit tests ensuring end-to-end coverage of our application.

Bulletproof Ruby on Rails Applications

# Why did the test fail?
Now, we need to find out why the test is failing.

We could look at the `test.log` file, but it’s of no help in this case. So, we’ll have to check out the registrations controller. To do that, we’’ll use the generator that Devise provides.
```bash
$ rails g devise:controllers users -c=registrations
create  app/controllers/users/registrations_controller.rb
```

The generator also gives us some code to add into our `config/routes.rb` file.


Rails.application.routes.draw do
  devise_for :users, controllers: {
    registrations: 'users/registrations'
  }
  root "site#index"
end

It's now a lot easier to see what happens with the request. 

Let's uncomment the `create` action in the registrations controller and add a breakpoint (with pry).



def create
  require "pry"; binding.pry
  super
end



The test should now stop at the breakpoint we've just added.


Let’s learn how to implement the code to pass the test.


Passing the Request Test

Let’s learn how to implement the code to pass the test.

Before We Start

The Why Behind Testing

The How Behind Testing

Planning

The Feature Layer

The Request Layer

The Unit Layer

Conclusion

Passing the Request Test

Why did the test fail?