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

Which of the following is the correct definition for the "I am on the homepage" step:

Which of the following is the correct definition for the “I am on the homepage” step:

Add `root "site#index"` to `config/routes.rb`.

Create a blank file named `app/controllers/site_controller.rb`.

Create `app/views/site/index.html.erb` and add the following code to it:
```ruby
class SiteController < ApplicationController
end
```

Create `app/controllers/site_controller.rb` and add the following code to it:
```ruby
class SiteController < ApplicationController
end
```

What’s the correct way to resolve the following error?
```text
Uninitialized constant SiteController
```


What’s the correct way to resolve the following error?
<pre><code class="language-text">Uninitialized constant SiteController
</code></pre>

Add the following to `config/routes.rb`:
```ruby
get "/registration", to: "registrations#new"
```

Add the following to `config/routes.rb`:
```ruby
devise_for :users
```

Add the following to `config/routes.rb`:
```ruby
get "/registration", to: "registrations#index"
```

Add a `registration` method to `app/controllers/site_controller.rb`:
```ruby
def registration
end
```

What’s the correct way to resolve the following error?
```bash
Undefined local variable or method `registration_path'
```



What’s the correct way to resolve the following error?
<pre><code class="language-bash">Undefined local variable or method `registration_path'
</code></pre>

It eliminates the need to implement email-sending logic

Which of the following is *not* a benefit provided by Devise?


Which of the following is not a benefit provided by Devise?

Create the controller file,` app/controllers/site_controller.rb`.

Create the view file, `app/views/site/index.html.erb`, for the `index` action of the site controller.

Add the following code to `app/controllers/site_controller.rb`:
```ruby
class SiteController < ApplicationController
 def index; end
end
```

Add the following to `config/routes.rb`:
```ruby
get "SiteController#index"
```

What’s the correct way to resolve the following error?
```bash
SiteController#index is missing a template for this request format and variant
```



What’s the correct way to resolve the following error?
<pre><code class="language-bash">SiteController#index is missing a template for this request format and variant
</code></pre>

Test your understanding of feature layer testing.

Before We Start

The Why Behind Testing

The How Behind Testing

Planning

The Feature Layer

The Request Layer

The Unit Layer

Conclusion

Quiz: Feature Layer