HomeCoursesEffective Unit and Integration Testing in Scala

5.0

Beginner

12h

Effective Unit and Integration Testing in Scala

Gain insights into effective unit and integration testing in Scala. Learn about ScalaTest, Mockito, ScalaCheck, and Docker/TestContainers to enhance testing quality and maintainability.

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Overview

Content

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Testing is a fundamental part of writing software. Tests should be written with as much care as we put into designing and coding our applications. Still, writing clean and well-organized test cases can be difficult. In many cases, their quality is lower than that of the rest of the application. This can seriously impact the overall quality and maintainability of the project in the long run. The focus of this course is on unit and integration tests in Scala. First, you’ll learn about the most famous testing framework for Scala—ScalaTest. Then, you’ll move to mocking and property-based testing with Mockito and ScalaCheck. Finally, the course will focus on integration testing, showing how to mock the dependencies on external services with Docker and TestContainers. After taking this course, you’ll have a more comprehensive view of the possibilities to run different tests in Scala, including practical knowledge of some widespread testing libraries.

Testing is a fundamental part of writing software. Tests should be written with as much care as we put into designing and coding...Show More

WHAT YOU'LL LEARN

A working knowledge of ScalaTest and its best practices

An understanding of property-based testing

An understanding of mocking and test doubles

Hands-on experience with mocking infrastructural dependencies via Docker containers

The ability to design and write effective tests in Scala

A working knowledge of ScalaTest and its best practices

TAKEAWAY SKILLS

Unit Testing

Testing via Docker

Content

37 Lessons4 Quizzes3 Assessments

Introduction

2 Lessons

Get familiar with the significance of testing in Scala, focusing on test types and best practices.

Course Objectives and Prerequisites

Types of Tests

Brief Introduction to Scala and sbt

3 Lessons

Look at Scala's paradigms, sbt's build capabilities, and effective project layouts for testing.

What Is Scala and When Should We Use It?

What Is the Scala Build Tool?

Project Layout

Writing Tests with ScalaTest

17 Lessons

Work your way through writing expressive test cases using ScalaTest’s diverse styles and tools.

Meet ScalaTest

Choosing a Testing Style

Assertions

Writing Human-Readable Assertions with Matchers

Collection-Based Matchers

Quiz: ScalaTest Basics

Custom Matchers

Handling Exceptions and Compilation Errors

Adding Human-Readable Information

Fixtures

Quiz: ScalaTest Proficiency

Testing Asynchronous Code

Using the Eventually Trait

Testing Private Methods and Nested Properties

Syntactic Sugar for Common Scenarios

Tagging and Ignoring Tests

Quiz: ScalaTest Advanced

Quiz: ScalaTest

Assessment

Mocking with ScalaMock

5 Lessons

Grasp the fundamentals of using ScalaMock for effective unit testing in Scala.

What Do We Need Mocks For?

Meet Mockito

Mocking Functions and Traits

Mocking Classes

Mocking Objects

Quiz: Mocking

Assessment

Property-Based Testing with ScalaCheck

5 Lessons

Take a closer look at property-based testing concepts, table-driven checks, and ScalaCheck integration.

What’s a Property?

Table-Driven Property Checking

Generators in ScalaCheck

Generator-Driven Property Checking with ScalaCheck

Checking Stateful Properties with ScalaCheck

Quiz: Property-Based Testing

Assessment

Mocking External Services with TestContainers-scala

4 Lessons

Tackle mock external services in integration testing using TestContainers-scala and Docker.

Meet TestContainers

Docker Compose and TestContainers

Programmatically Creating Containers

Quiz: TestContainers

Conclusion

1 Lessons

Build on key ScalaTest practices, advanced features, ScalaCheck, Mockito, and Docker-based integration testing.

The End of the Course

Certificate of Completion

Showcase your accomplishment by sharing your certificate of completion.

Course Author:

Matteo Di Pirro

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