Test-Driven Development in Scala 3, ScalaTest, and Mockito | CodeSignal Learn

intermediate

Test-Driven Development in Scala 3, ScalaTest, and Mockito

Back-end Engineering

4 courses

99 practices

13 hours

Master Test-Driven Development (TDD) in Scala 3 using ScalaTest—write tests first, implement code, and refactor. Learn to use test doubles with the Mockito-Scala framework to isolate components. Create cleaner, more maintainable Scala code while reducing bugs and improving development efficiency.

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Earn a shareable

Certificate of Achievement

Verified skills you'll gain

INTERMEDIATE

Programming, Algorithms, and Data Structures

INTERMEDIATE

Computer Science Fundamentals

Tools you'll use

Mockito

Scala

ScalaTest

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Course 1

Foundations of TDD in Scala 3 with ScalaTest: The Principles

6 lessons

27 practices

This course introduces Test-Driven Development (TDD) for Scala 3 projects, covering the Red-Green-Refactor workflow, TDD mindset, and setup with ScalaTest. Learn best practices like SOLID principles and dependency injection, and explore TDD's impact on code quality and speed compared to traditional approaches.

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Course 2

Red-Green-Refactor: Practicing TDD with Scala & ScalaTest

5 lessons

25 practices

This course focuses on practicing the core TDD workflow: "Red-Green-Refactor." You'll write failing tests (Red), implement code to pass them (Green), and refactor while keeping tests passing (Refactor). No new concepts are introduced—just hands-on practice with various requirements to sharpen your TDD skills.

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Course 3

Isolating Dependencies with Test Doubles in Scala

5 lessons

26 practices

Discover the pivotal role of test doubles in modern software testing. This introductory session will guide you through the essentials of dummies, stubs, spies, 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.

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Course 4

Refactoring by Leveraging Tests with Scala & ScalaTest

5 lessons

21 practices

This course focuses on the Refactor step in TDD, teaching developers to spot code smells and resolve them through refactoring. Using real-world examples, you'll identify common issues, apply refactoring techniques, and ensure functionality is preserved with existing tests.

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