Loading...

Back-end Engineering

3 learners

Foundations of TDD in Ruby and RSpec: The Fundamentals

This course introduces you to Test-Driven Development (TDD) in Ruby, focusing on the Red-Green-Refactor cycle, embracing the TDD mindset, and setting up a productive environment with RSpec. You'll learn best practices like adhering to SOLID principles and utilizing dependency injection, while understanding TDD's influence on code quality and development speed compared to traditional methods.

RSpec

Ruby

See path

6 lessons

27 practices

4 hours

Programming, Algorithms, and Data Structures

Lessons and practices

Lesson 1: Introduction to Test Driven Development in Ruby

Writing a Test for Non-Existent Method Using TDD

Implement the Sum Function in Minimal TDD Style

Refactoring the Sum Function

Lesson 2: Generalization in TDD with Ruby and RSpec

Testing the Add Function in TDD Red Phase

Transitioning to the Green Phase in TDD: Implementing the add_two_numbers Method

Refactor Unit Tests to Use Parameterized Tests with RSpec

Lesson 3: Introduction to TDD with Ruby and RSpec: Building a `calculate_total` Method

Writing Tests for Shopping Cart Calculation

Implementing Calculate Total for Shopping Cart Task

Shopping Cart Total Calculation Task

Implement Initial Functionality for Calculate Total Function

Refactor the calculate_total Method

Crafting a Failing Test to Achieve TDD Mastery

Calculate Total Cost of Shopping Cart

Refactor to Use Ruby's Inject Method

Lesson 4: Setting Up a Ruby Testing Environment with RSpec

Understanding RSpec with Asynchronous User Models

Verify User Creation with RSpec

Refactor Test Setup with RSpec's Let Method

Grouping Email-Related Tests with Nested Describe Blocks in RSpec

Test Invalid Email Throws Error in User Class

Write an Asynchronous Test for Fetching User in Ruby

Lesson 5: Introduction to Managing Dependencies in TDD with Ruby

Testing a UserManager with Red-Green-Refactor Approach

Implementing a User Manager in Ruby

Refactor Your Tests in UserManager Class

Implementing a User Logging Feature with TDD in Ruby

Implementing Logging with Dependency Injection in UserManager

Refactoring UserManager for Code Quality

Lesson 6: Introduction to the AAA Pattern in TDD with Ruby and RSpec

Refactoring TaskList Tests with AAA Pattern

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.