Loading...

Back-end Engineering

Isolating Dependencies with Test Doubles in Ruby & RSpec

Explore the critical role of test doubles in modern software testing. This session introduces you to dummies, stubs, spies, mocks, and fakes. Gain expertise in isolating units under test, managing behavior, and constructing fast, reliable, maintainable tests. Step into using test doubles to enhance your development practices.

RSpec

Ruby

See path

5 lessons

25 practices

3 hours

Programming, Algorithms, and Data Structures

Course details

Introduction to Dependencies in Testing with Ruby

Preview

Testing Email Parameters with Dummies

Enhancing DummyLogger with Severity Parameter in EmailService

Fixing Test Suite for EmailService with Test Doubles

Enhancing EmailService Tests with Dummies

Enhancing NewsletterService Tests with Dummies

Previous Course

Next Course: Refactoring with Confidence Using Tests in Ruby & RSpec

Meet Cosmo:

The smartest AI guide in the universe

Our built-in AI guide and tutor, Cosmo, prompts you with challenges that are built just for you and unblocks you when you get stuck.

From our community

Hear what our customers have to say about CodeSignal Learn

I'm impressed by the quality and can't stop recommending it. It's also a lot of fun!

Francisco Aguilar Meléndez

Data Scientist

+11

I love that it's personalized. When I'm stuck, I don't have to hope my Google searches come out successful. The AI mentor Cosmo knows exactly what I need.

Faith Yim

Software Engineer

+14

It's an amazing product and exceeded my expectations, helping me prepare for my job interviews. Hands-on learning requires you to actually know what you are doing.