Software Engineering

Isolating Dependencies using JUnit and Mockito

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.

JUnit

Kotlin

Mockito

See path

5 lessons

26 practices

3 hours

Course details

Introduction to Dependencies in Testing with Kotlin

Preview

Email Service Validation with TDD

Implementing LogSeverity in EmailService

Debugging and Fixing Unit Tests in EmailService

Creating Dummies for Dependencies in EmailService

Implementing Test Doubles with Interfaces in NewsletterService

Previous Course Next Course: Refactoring by Leveraging Tests with Kotlin & JUnit

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Francisco Aguilar Meléndez

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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.

Alex Bush

Full Stack Engineer

I'm really impressed by the AI tutor Cosmo's feedback about my code. It's honestly kind of insane to me that it's so targeted and specific.

Abbey Helterbran

Tech consultant

I tried Leetcode but it was too disorganized. CodeSignal covers all the topics I'm interested in and is way more structured.

Jonathan Miller

Senior Machine Learning Engineer

+12

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

Isolating Dependencies using JUnit and Mockito

Course details

Unit 15 practices38 min

Unit 26 practices44 min

Unit 34 practices32 min

Unit 45 practices38 min

Unit 56 practices44 min

Turn screen time into skills time

Join the 1M+ learners on CodeSignal

From our community

From our community