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Back-end Engineering

3 learners

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

Lessons and practices

Lesson 1: Introduction to Dependencies in Testing with Ruby

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

Lesson 2: Using Stubs in Test Driven Development with Ruby

Using Stubs to Simulate Weather Conditions in Ruby

Using Stubs to Handle Temperature Alerts in Ruby

Handling Storm Warnings in WeatherAlertService Using Stubs

Handling Normal Weather Conditions in Weather Alert System Using Stubs

Refactor Weather Alert Service Using RSpec Doubles

Lesson 3: Integrating Spies into TDD with Ruby and RSpec

Verify Notification Send Method with RSpec Spies

Verify Notification Delivery with RSpec Spies

Testing Notification Priority with RSpec Spies

Verify Notification Functionality with RSpec Spies

Lesson 4: Introduction to Mocks with Ruby and RSpec

Testing Pricing Service with Mocked Exchange Rate Values

Isolating Exchange Rate Calls in Pricing Service Test

Testing Pricing Service with Negative Amount Exceptions

Testing Pricing Service with Custom Exchange Rate Mocks

Testing Pricing Service with Bulk Price Calculations

Lesson 5: Introduction to Fakes in TDD with Ruby and RSpec

Implementing User Creation with Fake Repository Using Test-Driven Development

Implementing Duplicate Email Validation during User Registration in TDD

Implementing User Name Update with Test-Driven Development in Ruby

Implementing Exception Handling for Non-Existent User Name Updates in TDD

Implementing Deactivate User Method in TDD with Ruby

Implementing Exception Handling for User Deactivation in TDD

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