Hello guys, today I am going to talk about JUnit and unit testing, one of the key skills for any software developer. You may already know that JUnit and Mockito are two of the most for Java applications, and you will find them in almost every Java application classpath. popular testing libraries I often meet and work with Java developers who know Java well but haven’t written a single unit test. When I ask them why don’t you write unit tests, they come up with many excuses like they don’t have time for writing unit tests, there is always deadline pressure, and some of the honest guys will tell you that they tried writing but give-up after 10–15 minutes due to difficulty in testing their code. Whatever your reason for not writing a unit test, I don’t think it’s going to work anymore because, in today’s world of and , there is increased focus on code reviews, unit testing, and integration testing, and you just can’t get away with not writing tests. DevOps Automation In fact, every good software developer must know how to write unit tests, and nearly all Java jobs ask for unit testing skills, and those who don’t mention it assume that you already know unit testing. Unit tests are at the lowest level and typically check a single method to confirm that they return the correct result. Don’t worry if you haven’t written any unit tests. As long as you can accept the fact, and you are willing to learn unit testing in Java using and , you are in good shape. JUnit Mockito In the past, I have shared some great books for learning unit testing in Java like the and , and today, I am going to share some of the online courses you can use to learn JUnit 5 or Jupiter, the latest version of JUnit library, and Mockito to write a unit test for your Java application. Test-Driven JUnit in Action You can use these online courses to get up-to-speed with JUnit and Mockito. This will not only help you in your current project but also increase your chances of getting a job with better pay. Believe me, everyone loves a and there is always a demand for a programmer who can code and write good tests. good software developer What Is Unit Testing and Why Do We Write Unit Tests? If you are thinking about why you should write unit tests, shouldn’t we get paid for writing code that adds functionality? Then let me tell you that unit tests are necessary for every good piece of software and every programmer should write a . unit test It increases confidence during development and helps you to write cleaner, more reusable code, and it also helps you catch bugs earlier. Catching mistakes in the development phase is a lot less costly than finding them in production. It not only saves you from embarrassment, but it also saves your company and user from frustration. Now that you are convinced you to want to , you can explore these online courses to get started! learn unit testing Top 5 Online Courses to Learn JUnit in-depth In Java, JUnit is the defacto standard for unit testing, but you often need Mockito, a mocking framework that is often used along with JUnit to make unit testing easier. I have been using JUnit since JUnit 3, which was prior to annotations. Then comes in 2006, and after 11 years of waiting, came out in September 2017. JUnit 4 JUnit 5 As of writing, this is the latest version of JUnit and every Java developer should learn it. Even though a lot of projects are still using JUnit 4, learning JUnit 5 will help you write better tests faster by leveraging new features. Most of these courses cover JUnit 5, but I have also included a course on test-driven development to learn some of the and techniques for improving unit tests. best practices 1. Java Unit Tests for Beginners This is one of the best for learning how to write Java unit tests with JUnit 5 or Jupiter. This course is ideal for all kinds of Java developers — from intermediate developers with several years of experience to beginners who have not written a single unit test before. courses The course is full of practical examples, additional exercises, and a unit testing cheat sheet. It starts from scratch, telling you what a unit test is and why you should use it, then teaching you how to do it step by step. Learn more: Java Unit Tests for Beginners: JUnit 5 for your first IT job The course also teaches you , and their sample project, The HealthyCoder example, makes things really interesting. The course is filled with exercises and an extra JUnit cheatsheet that provides enough knowledge to start writing unit tests on your own. unit testing best practices On top of all of this, instructor, Adrian Więch has an excellent voice, which is just perfect for teaching, and his voice modulation, pace, and skill make things simpler, which makes this course very interesting. I strongly recommend to all Java developers who want to learn unit testing this year. this course 2. Learn Unit Testing With JUnit and Mockito in 30 Steps This is another awesome to learn Mockito and JUnit — the most popular unit testing and mocking frameworks in the Java world — with 25 examples. course I am a big fan of Ranga and his in28-Minutes courses; he typically focuses on 20 percent of the important stuff that is used 80 percent of the time. Having seen his and course, I know that this will also be the good one and it didn’t disappoint me. Spring Masterclass Microservices Learn Mockito and JUnit (Unit Testing in 30 Easy Steps The takes a step-by-step approach, and in 30 steps, it will teach you all you need to know about Mockito and JUnit so you can write your own tests. The first 18 steps are about and the last 12 are about JUnit. course Mockito The course not only covers basic stuff, like writing simple tests, but also covers more advanced concepts like testing static methods, organize JUnit tests into suites, parameterized tests, , and, in general, how to write better tests. testing exceptions in JUnit tests Overall, this course provides a good, hands-on total. , brief course for learning Mockito and JUnit in less than 5 hours 3. Java Unit Testing With JUnit 5 I recently come across this for learning. It’s a bit different from and because it’s interactive and allows you to run code right from the webpage, which makes it very effective. new online platform Udemy Pluralsight Like the previous two courses, this course will also teach you how to write unit tests with JUnit 5, but it also covers topics like why unit tests are important and structure of good unit tests, , assumptions and parameterized tests, and more. assertions If you like interactive learning, then you can check out this course; it comes with three free previous lessons and a 30-day return policy, which is good enough to give it a go. Learn more: Java Unit Testing with JUnit 5 4. Practical Test-Driven Development for Java Programmers Learning JUnit is one thing, but writing unit tests is another. It’s easy to write a trivial unit test for a sample project, but when you go into a real project where TDD has not been used and no unit test is written, you will find a lot of challenges when writing your very first test — that’s where this course comes in handy. Practical Test Driven Development for Java Programmers Course Ratings are calculated from individual students' ratings and a variety of other signals, like age of rating I have purposefully included this because I believe learning TDD and unit testing, in general, is as important as learning . course JUnit and Mockito The instructor Matt Greencroft is very experienced and will teach you how to write unit tests for trickier scenarios and show you use TDD techniques to fix applications that weren’t developed using TDD. My favorite part of this course is because this is something a needs to do in his day-to-day coding. I have learned a lot of good stuff from this course and feel I know unit testing better than before. Chapter 10: Handling Legacy Code Java developer Therefore, I highly recommend this course for all Java developers who want to learn unit testing or improve their TDD skills, btw, if you need books you can also read my list of . JUnit and TDD books for Java Programmers 5. Test-Driven Development Practices in Java This is another I have included on Test-Driven Development (TDD) practices and tools supporting TDD on the Java platform, including JUnit and Mockito. course It nicely complements the previous course and covers things that are not covered in theirs, like and . PowerMock DBUnit Test-Driven Development Practices in Java Overview of Practices, Principles, and Tools Hello. This is Mike Nolan, and welcome to this Pluralsight course Instructor Mike is a solution architect for US Foods and worked in IT for over 15 years, holding roles focused on technical leadership, solution architecture, and enterprise architecture, which means you will learn a lot from his experience. Though, you would need a to access this course, which cost around $29 per month or $299 per year. It may seem costly, but to be honest with you, it’s completely worth it, as it gives you access to 5000+ online courses on Pluralsight and numerous quizzes and exercises to learn anything you want. Pluralsight membership Anyway, even if you don’t have a membership, you can still get access to this course by using their , which allows 200 minutes of access and is enough to complete this course. 10-day FREE pass That’s all for now on some of the best courses for learning Mockito and JUnit. I have told my readers to learn unit testing for a long time. I had included this as the first thing on my list of and also shared some free courses to learn JUnit earlier. If you don’t have any goals for 2019, make unit testing your top priority this year. 10 things Java programmer should learn 10 Things Java Programmers should learn in 2019 It’s also worth noting that JUnit 5 tests will run with or above, so it’s also good to learn Java 8 if you haven’t. Always remember: Writing better unit tests distinguish great programmers from average programmers! Java 8 Other you may like: Java programming articles 10 Free Data Structure and Algorithms Courses 5 Course to learn Java Concurrency in Depth 10 Tools Java Developer Should Learn in 2019 10 Things Java Developer should learn in 2019? 10 Frameworks Java and Web Developer Should learn 10 Essential Testing Tools for Java developers 10 Free Java Courses for Beginners and Experienced Programmers 10 Tips to become a better Java Programmer in 2019 How Spring MVC works internally in Java? 7 Reasons to use Spring for REST API development in Java 10 Books Every Java Developer Should Read in 2019 Top 5 Courses to Learn JVM Internals and Performance Tuning Thanks a lot for reading! If you like these , then please share them with your friends and colleagues. If you have any questions or feedback, or you want another course to add in this list, feel free to drop a note. All the best with your unit testing journey! JUnit 5 online courses

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How to Learn Unit Testing in Java: JUnit and Mockito Courses

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