Testing Episodes - Ruby on Rails Screencast Tutorials

Tests Without Assertions Warning in Rails 7.2

Sep 16, 2024

Rails 7.2 now warns if any test runs without assertions. It helps make tests that may raise errors more explicit and less prone to mistakes.

15m

Writing Tests for Scheduled Blog Posts

Apr 03, 2023

Our scheduled blog posts adds some complexity to our app. In this lesson, we're going to write some tests to make sure that our code does what we want it to do.

23m

Concept Application: Assert Difference Deep Dive

In this video, we will explore how the concepts we looked at in "Flattening Scopes in Ruby" are used in Rails by taking a look at the assert_difference method. We will walk through how the method works while taking note of where the concepts are applied.

Contrasting Colors with YIQ and Helper Tests in Rails

Apr 23, 2021

Ever wondered how to generate contrasting colors in your Rails app? It's easy using the YIQ calculation and we can test it easily with helper tests.

10m

Continuous Deployment with Rails & GitHub Actions

Nov 23, 2020

Continuous Deployment is the automation of deploying any code that gets merged into your main or release branch. We can easily set up GitHub Actions to run CI and CD for us to automate everything.

13m

How to Test Gem Dependencies with Appraisal

Sep 03, 2020

Appraisal lets us test our code against different versions of dependencies. This is fantastic if you're building Rubygems that must work with multiple versions of Rails or other dependencies

11m

Code Coverage with SimpleCov and RailsBytes

Jun 23, 2020

Add code coverage to your app using SimpleCov and RailsBytes. We'll walk through installing simplecov and creating a RailsByte to automate it for us going forward.

Fixing Brittle Tests: Avoid Hardcoded Values

Dec 23, 2019

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.