JUnit and Mockito Unit Testing for Java Developers from Coursera

Are you looking for a simple guide to learning unit testing? This video course is perfect for you. It includes hands-on exercises and best practices to help you understand JUnit and Mockito unit testing with ease.

-The course starts with an introduction to unit testing and the importance of JUnit.

-You'll create a Java project using JUnit and follow best practices for writing and running unit tests with JUnit and IntelliJ IDEA.

-You'll also write mock object-based unit tests with Mockito and make powerful assertions using the Hamcrest assertions library included with JUnit.

-By the end, you'll have the skills to write better unit tests using JUnit, Mockito, and Hamcrest.

This course is suitable for Java developers and testers with basic Java knowledge who want to write unit tests using JUnit, Mockito, and Hamcrest. Learn modern unit testing concepts, run tests in the IDE, analyze code for quality tests, and compose readable assertions.

What's inside

Syllabus

Introduction

In this module, we will introduce you to the course and its structure. The welcome video provides an overview of what you can expect from the course, setting the stage for your learning journey. Following this, the course structure overview gives a detailed breakdown of each section, ensuring you know how to navigate through the content effectively.

Traffic lights

Read about what's good

what should give you pause

and possible dealbreakers

Uses JUnit, Mockito, and Hamcrest, which are standard tools and libraries for Java developers writing unit tests and ensuring code quality

Teaches how to create mock object-based unit tests with Mockito, which is essential for isolating and testing individual components in complex systems

Explores the Hamcrest assertions library, enabling developers to write more readable and expressive assertions in their unit tests

Covers setting up a project using the Maven Quickstart Archetype, which is a common practice for managing Java projects and dependencies

Requires basic Java knowledge, so learners without prior experience in Java programming may find it challenging to follow along with the course material

Focuses on using IntelliJ IDEA, so learners using other IDEs may need to adapt the instructions to their preferred development environment

Reviews summary

Junit and mockito unit testing

According to learners, this course provides a clear, practical introduction to unit testing in Java using JUnit and Mockito. The hands-on examples are highly valued, particularly the sections on Mockito for mocking. Students found the instructor clear and appreciated the focus on best practices. However, some noted that content or tool versions may feel dated, causing potential setup friction. While offering a solid foundation, it might assume basic prior knowledge and isn't solely for absolute beginners in testing.

Pace can be fast, some prior knowledge assumed

"I struggled with the setup instructions and felt like the course assumed more prior knowledge than stated. Not recommended for absolute beginners in testing."

"The pace was okay, but some explanations were brief. If you're completely new to testing or Java development principles, you might struggle."

"It's a good starting point but don't expect to become an expert. Some topics could have gone deeper; it felt like a quick overview."

Strong coverage of mocking dependencies

"The Mockito section was particularly helpful for understanding how to isolate code for testing."

"Using Mockito to test layered architecture components was insightful."

"The Mockito part was strong. Mockito usage was covered thoroughly, which was great for me."

Provides clear explanations and hands-on practice

"Excellent course! It really clarifies unit testing principles using JUnit and provides practical examples."

"Clear, concise, and practical. Covered all the essentials... The hands-on exercises are excellent."

"I learned a lot about writing effective unit tests... The hands-on exercises were excellent."

Tools or content versions may be outdated

"The course content feels a bit outdated in places. Some dependencies or tools might have newer versions or slightly different usage now."

"Outdated software versions used in the demos caused issues for me trying to follow along."

"I had to look up newer ways of doing things while following along due to older content."

Activities

Be better prepared before your course. Deepen your understanding during and after it. Supplement your coursework and achieve mastery of the topics covered in JUnit and Mockito Unit Testing for Java Developers with these activities:

Review Core Java Concepts

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Reinforce your understanding of core Java concepts like object-oriented programming, data structures, and algorithms to better grasp the examples and exercises in the course.

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Review Java syntax and data types.
Practice writing simple Java programs.
Study object-oriented programming principles.

Read 'Effective Java' by Joshua Bloch

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Gain a deeper understanding of Java best practices to write more testable and maintainable code, complementing the unit testing techniques taught in the course.

View Effective Java (3rd Edition) on Amazon

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Read selected chapters relevant to testing.
Take notes on key concepts and examples.
Apply the principles to your Java projects.

Write Unit Tests for Simple Java Classes

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Practice writing unit tests for simple Java classes to solidify your understanding of JUnit and Mockito syntax and usage.

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Create a simple Java class with methods.
Write JUnit tests for each method.
Use Mockito to mock dependencies.
Run the tests and analyze the results.

Four other activities

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Follow Mockito Tutorials

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Deepen your understanding of Mockito by following online tutorials and examples, focusing on advanced mocking techniques and best practices.

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Find Mockito tutorials online.
Follow the tutorials step-by-step.
Experiment with different mocking scenarios.
Apply the techniques to your projects.

Create a Unit Testing Project

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Start a personal project to apply your JUnit and Mockito skills, creating a well-tested application from scratch.

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Choose a project with clear requirements.
Set up a project with JUnit and Mockito.
Write unit tests for each component.
Refactor code based on test results.

Read 'xUnit Test Patterns' by Gerard Meszaros

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Learn advanced testing patterns to improve the quality and maintainability of your unit tests, expanding on the basic techniques covered in the course.

View xUnit Test Patterns: Refactoring Test Code... on Amazon

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Read selected chapters on unit testing patterns.
Identify patterns applicable to your projects.
Apply the patterns to refactor existing tests.

Contribute to an Open Source Project

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Contribute to an open-source project by writing unit tests, gaining experience with real-world testing scenarios and collaboration.

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Find an open-source project on GitHub.
Identify areas needing unit tests.
Write and submit your unit tests.
Address feedback from maintainers.

Career center

Learners who complete JUnit and Mockito Unit Testing for Java Developers will develop knowledge and skills that may be useful to these careers:

Java Developer

A Java Developer specializes in writing code using the Java programming language. This course on JUnit, Mockito, and Hamcrest is tailored to Java Developers. This course helps a Java Developer write effective unit tests within existing projects. They will learn how to set up projects, run tests, and make assertions about their code. A Java Developer who has this skill provides value to the team by improving the quality of their code and minimizing defects. Having this skill, makes them a more valuable team member.

See salaries and explore the career path for Java Developer

Software Engineer

A Software Engineer designs and builds software systems. This course on JUnit, Mockito, and Hamcrest helps a software engineer write better code. Understanding unit testing is essential to the software engineering process, and this course provides hands-on exercises and best practices. Software engineers who have knowledge of testing and test-driven development write more reliable code, which in turn, reduces the overall cost and time of development. A software engineer with unit testing skills is a valuable asset.

See salaries and explore the career path for Software Engineer

Software Developer

A Software Developer writes code and builds applications. This course helps a software developer write better code, as it focuses on unit testing using JUnit, Mockito, and Hamcrest. As software development is a team effort, a developer who can write good unit tests helps other developers understand their own code and helps prevent bugs, which saves the team time and money overall. This course provides the concepts and tools a software developer needs to write more reliable code, and will make them a more valuable team member given this ability.

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Application Developer

An Application Developer works on creating software applications. This course will help an application developer build a strong foundation in unit testing using JUnit, Mockito, and Hamcrest, which is essential for delivering high-quality applications. This course covers creating projects, writing tests, and using mock objects. An application developer who understands these concepts will be able to build more resilient and reliable applications. This is a skill they can leverage in their role.

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Quality Assurance Engineer

A Quality Assurance Engineer ensures that software meets standards of quality. The work of a quality assurance engineer overlaps with unit testing, which this course covers using JUnit, Mockito, and Hamcrest. This course teaches how to write and run effective unit tests using these tools. Understanding these tools is crucial to any quality assurance engineer, as it helps them build a foundation in testing, which is the core of the role. This knowledge allows them to catch software bugs early, before they make it to production and affect end users.

See salaries and explore the career path for Quality Assurance Engineer

Test Automation Engineer

A Test Automation Engineer automates the testing of software. This course focuses on JUnit, Mockito, and Hamcrest for unit testing, all of which are used in test automation. This course allows a test automation engineer to build a foundation in unit testing, which is a critical component of any test automation efforts. The course teaches best practices for writing unit tests, ensuring that the tests are effective, efficient and reliable. These skills will help a test automation engineer improve the quality of the development pipeline.

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Backend Developer

A Backend Developer focuses on server-side logic and databases. This course introduces how to write effective unit tests using JUnit, Mockito, and Hamcrest, which are essential for building reliable backend systems. This course teaches practices for unit testing various layers of an application. A backend developer needs to have knowledge of testing to ensure the system works as expected and can handle different scenarios. This course can help a backend developer master these practices and write high-quality code.

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Technical Lead

A Technical Lead guides a team of developers. While a technical lead doesn't usually write code, they do shape the direction of how code is written. When the technical lead has knowledge of unit testing, such as the knowledge taught in this course on JUnit, Mockito, and Hamcrest, they can guide their team on best practices. This course may help a technical lead improve the technical skills of their team members by teaching them how to properly write unit tests, which contributes to a more robust software system overall.

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DevOps Engineer

A DevOps Engineer works to automate software deployment and infrastructure management in modern software development. While this role may not write unit tests on a daily basis, an understanding of unit testing with JUnit, Mockito, and Hamcrest can help a Devops engineer understand the software development lifecycle. This course gives them the skills to bridge the gap between development and operations, allowing them to more effectively automate and manage the deployment process. This course may help them to better integrate testing into the deployment pipeline.

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Release Manager

A Release Manager oversees the software release process, including testing. This course, which covers JUnit, Mockito, and Hamcrest, gives a release manager more understanding of the testing process. If the release manager has a better understanding of testing, they can better ensure that software releases meet quality standards. This course may help the release manager better improve the overall release process by ensuring more reliable releases. While a release manager may not directly use these testing tools, their ability to understand them will allow them to manage the release process better.

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Software Architect

A Software Architect designs the high-level structure of a software system. While a software architect does not always write the code itself, understanding unit testing can be valuable. This course on JUnit, Mockito, and Hamcrest provides an understanding of how code is tested at the unit level. This can improve the overall design of a software system. A software architect can influence development practices and improve the quality of a project, especially if they understand unit testing.

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Build Engineer

A Build Engineer is responsible for developing and maintaining the build system for a software project. This course on JUnit, Mockito, and Hamcrest may help a build engineer understand how unit tests are integrated into the software build pipeline. A build engineer can leverage this knowledge to create more efficient build processes. They are responsible for providing a seamless process for developers to run tests, and this course can give them more information about the technical side of testing.

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Database Administrator

A Database Administrator manages databases and data-related resources. While a database administrator is not involved in writing unit tests directly, a general knowledge of software development and testing will benefit them. This course on JUnit, Mockito, and Hamcrest provides a general introduction to how a developer tests their code. Having knowledge of the full software development cycle will help the database administrator in their role, making them a more well-rounded professional.

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Project Manager

A Project Manager oversees and coordinates software development projects. While they don't write code, having a grasp of testing concepts, such as those taught in the JUnit, Mockito, and Hamcrest course, can help them manage a project more effectively. Using this course, a project manager can better understand timelines, deliverables, and risks associated with software testing. They can better facilitate communication and help manage a project more effectively. This course may give them more insight into one piece of the full development cycle.

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Technical Writer

A Technical Writer creates documentation for software products. Having some knowledge of software development, including an understanding of testing practices such as JUnit, Mockito, and Hamscrest can help a technical writer perform their duties. They may need to understand how testing works in order to write about it. This course may provide them with a deeper understanding of the development lifecycle. This may help a technical writer write more accurate documentation.

See salaries and explore the career path for Technical Writer

JUnit and Mockito Unit Testing for Java Developers

What's inside

Syllabus

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Reviews summary

Junit and mockito unit testing

Activities

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