how to build a complete, real-world application from scratch with Ruby on Rails step by step.
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Here's how to setup Rspec for an open source project
How do we go about writing robust tests with rspec for simple_calendar?
A/B testing (or split testing) is a really common way of testing changes in your app to determine which works best for your users.
In this episode, we add tests for our Basecamp 3 style urls that we built using a Rack middleware
Learn how to write tests for validations on ActiveRecord objects in Ruby on Rails
Test Driven Development, or TDD, is a pretty simple process that allows you to write your code in conjunction with tests to ensure a high level of confidence and code coverage.
You can use Fixtures in Rails to create sample database records for your tests to run against. They're easy to setup and extremely quick.
Adding Devise test helpers allows you to quickly login a user for testing controllers in Rails
Learn how to write integration tests in Rails to test controllers and actions
Learn how to set up GitHub Actions to run Continuous Integration (CI) with Ruby on Rails
WebMock is a fantastic way to stub out and mock your HTTP requests. It will actually throw an exception in your test suite when an HTTP request is made so that you know when you're hitting an external API that you haven't stubbed out correctly.
Testing integrations with external APIs in your Rails app can be hard. You don't know what requests are being made (or even the responses), so how can you properly mock them out? VCR to the rescue.
Learn how to test Active Job in your Ruby on Rails application
Rails provides several helper methods for testing times and dates in your applications. You can now freeze time and time travel like in the movies!
Rails provides several really useful test helpers for ActionMailer so we can quickly iterate on our design, test that our code queues up the right emails, and make sure our emails contain the right content.
Testing ActionCable authentication with Devise is pretty easy, especially when we build our own helpers to stub out Warden
Test suites often become brittle over time where small changes end up breaking various tests. One way to avoid that is by avoiding using hardcoded values in your test suite.
Test stubs are very handy when you want to mock out the response to a method call. This allows your tests to be more reliable and skip long running or unnecessary method calls.
Mocks are a handy tool for writing tests in Ruby. You can use them to fake an object and verify that the correct methods were called against it. Perfect for testing a method that integrates closely with another class or module.
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