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


The following error appears when we run the test:
```text
Unable to find link or button "registration-link"
```

No wonder. There is nothing on the homepage. But having the test lead the way feels refreshing. Let's add a link to make this step pass.

# Adding link to the view
Open `app/views/site/index.html.erb` and add a link like the following:

Let’s implement the code to pass the second test.


Passing the Second Test

Let’s implement the code to pass the second test.

Before We Start

The Why Behind Testing

The How Behind Testing

Planning

The Feature Layer

The Request Layer

The Unit Layer

Create a Bill Split Application Using Ruby on Rails

Conclusion

Passing the Second Test