Isolating Dependencies with Test Doubles with Go & Testify

Overview

Discover the pivotal role of test doubles in modern software testing. This introductory session will guide you through the essentials of dummies, stubs, mocks, and fakes. Learn how these powerful tools help you isolate units under test, control behavior, and build reliable, fast, and maintainable tests. Step into the world of test doubles and elevate your software development skills.

Syllabus

Unit 1: Isolating Dependencies with Test Doubles: Dummies

Understanding EmailService in TDD with Dummy Implementations
Enhancing Logger Interface with Severity Parameter
Identifying and Fixing Bugs in EmailService Tests
Implementing Dummy Dependencies in EmailService Tests
Implementing Test Doubles for NewsletterService in C#

Unit 2: Isolating Dependencies with Test Doubles: Stubs

Stubbing for Weather Alerts
Handle freezing conditions with Stubbed data
Replace the hand-built Stub with Testify
Handling stormy conditions
Stubbing Out Lovely Weather
Refactor!

Unit 3: Mocking Dependencies with Testify in TDD

Mock Pricing Service for Testing
Verifying Dependencies Aren't Called using MocksMock Pricing Service for Testing
Expect Errors for Negative Prices
Mocking Multiple Calls with Mock Implementations
Implement and Test Currency Price Conversion