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UdemyBestseller on UdemyJava Spring FrameworkPaid courseIntermediate levelCertificate

Spring Boot Unit Testing with JUnit, Mockito and MockMvc (Udemy.com)

Develop Real-Time Spring Boot Unit Tests: JUnit, Mockito, MockMvc, TDD, JsonPath, Hamcrest, H2 Embedded DB, MySQL

Created by: Chad Darby

Last updated January 2026

Our take

Based on the ratings of 4,042 students, a sample of their written reviews and the syllabus, as the course stood in January 2026. No course pays to be reviewed.

This is a 9.9 hour course built around one job: teaching Spring Boot developers to write real tests. It moves through JUnit 5 fundamentals, test driven development, Mockito mocking, and MockMvc for both MVC controllers and REST APIs, with JsonPath and Hamcrest along the way. Chad Darby teaches it with Eric Roby credited as co-instructor, and the syllabus assumes Java 17, Spring Boot 3.x and Maven, so this is not a first Spring course.

Reviewers consistently praise Darby's clarity and pacing; one reviewer notes this is already their fourth course with him and calls the explanations organized and easy to follow. The complaints cluster around structure: a few reviewers wanted one project that expands over time rather than separate GradeBook and grades apps, and one flagged repetition, similar test classes (MathGrade, ScienceGrade) built out individually instead of using shared abstractions. A three-star review noted the course leans code-along in its second half with lighter explanation, and said some topics need outside research to fully land.

At 135 lectures and just under 10 hours, it stays narrowly focused rather than trying to be a full curriculum, which makes it a faster way to fill a specific testing gap. It was updated in January 2026, so the Spring Boot 3 material is current. With a 4.8 rating across more than 4,000 reviews, it holds up as the go-to pick for this narrow topic on Udemy.

Best forSpring Boot developers who already build apps and now need to test them properly.
Skip it ifYou want a single project that grows section by section instead of separate demo apps.

Pros

  • Covers JUnit 5, Mockito, MockMvc, TDD and JsonPath/Hamcrest in one course
  • Chad Darby's teaching gets consistent praise for clarity across reviews
  • Recently updated for Spring Boot 3 and Java 17, dated January 2026
  • Source code and lecture PDFs are downloadable for offline review

Cons

  • Uses separate demo apps (GradeBook, MathGrade, ScienceGrade) instead of one growing project
  • Second half leans more code-along with lighter explanation, per at least one reviewer
  • Some advanced assertion distinctions, like assertIterableEquals vs assertLinesMatch, aren't spelled out
Great course for learning JUnit and Mockito. Clear explanations, practical examples, and hands-on exercises make it easy to apply concepts in real projects.
Anonymized User, a student

Listed as Intermediate, and the reviews back that up: it's for developers already writing Spring Boot apps, not learning Spring itself.

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What you will learn

  • Explore the architecture of the Spring Boot 3 testing framework and write integration tests
  • Develop unit tests with JUnit 5 and supporting JUnit Assertions
  • Mock Spring container dependencies using Mockito
  • Apply Test Driven Development (TDD) using JUnit 5, Mockito and Spring Boot 3
  • Test Spring Boot MVC web applications with MockMvc and ModelView assertions
  • Test Spring Boot REST APIs with MockMvc, JsonPath and Hamcrest
  • Develop integration tests for Spring Data JPA including database init and cleanup
  • We are RESPONSIVE INSTRUCTORS ... post your questions and we will RESPOND in 24 hours.
  • Spring Boot developers with JUnit and Mockito testing are in HIGH-DEMAND. Level up your career!
  • You can DOWNLOAD all source code and PDFs. Perfect for offline LEARNING and REVIEW.

Course content

15 sections · 135 lectures · 9.9 hours of video 4 articles

  1. 1Introduction 1 free preview3 lectures · 5 min
  2. 2JUnit Review 1 free preview28 lectures · 2.5 hours
  3. 3Test Driven Development (TDD) 1 free preview9 lectures · 47 min
  4. 4Spring Boot Unit Testing Support 1 free preview7 lectures · 35 min
  5. 5Unit Testing - Mocking with Mockito 2 free previews10 lectures · 43 min
  6. 6Unit Testing - Reflection Test Utils 1 free preview4 lectures · 13 min
  7. 7Testing Spring Boot MVC Web Apps - Database Integration Testing 1 free preview11 lectures · 52 min
  8. 8Testing Spring Boot MVC Web Apps - MVC Controller Testing 1 free preview10 lectures · 49 min
  9. 9Testing Spring Boot MVC Web Apps - GradeBook App - Student Grades 1 free preview14 lectures · 1 hour
  10. 10Testing Spring Boot MVC Web Apps - Set Up SQL Scripts in properties file 1 free preview4 lectures · 17 min

Who it is for

The instructor says it suits

  • The course is appropriate for all Spring Boot developers.

What you need before you start

  • Java: Java 17 or higher
  • Spring Boot: version 3.x or higher
  • Maven: version 3.9 or higher

How it compares

Against the other 101 rated Udemy courses in Java Spring Framework on CourseDuck:

  • Rating4.8 out of 5higher than 99% of them
  • Reviews4,042#28 of 102 by number of reviews
  • Length9.9 hoursshorter than 56% of them
  • Last updatedJanuary 2026more recently than 50% of them

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Course Description

Spring Boot is the most popular framework for building enterprise Java applications. Spring Boot includes testing support to develop unit tests and integration tests using JUnit, Mockito and MockMvc. By developing tests, you can create applications with better code design, fewer bugs, and higher reliability. This course shows you how to take full advantage of Spring Boot's testing support.

You will also use modern development tools such as IntelliJ (free version) and Maven. All of the projects are based on Maven, so you are free to use any IDE tool that you want.

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In this course, you will get:

- All source code is available for download

- Responsive Instructors: All questions answered within 24 hours

- PDFs of all lectures are available for download

- Professional video and audio recordings (check the free previews)

- High quality closed-captions / subtitles available for English and 14 other languages (new!)

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Over 3,000+ Reviews!

- (the most reviews for any Spring Boot Unit Testing course on Udemy, nearly DOUBLE the nearest competitor)


Students love this course! 5-star reviews

Chad Darby and Eric Roby are great at delivering the materials and giving good real-world examples of concepts. they make the course a very enjoyable class, This course is very thorough and detailed. Thank you - Ninos


Great course, the material is explained in such a clear way. I enjoy it a lot. Highly recommendable. - Ardak Sydyknazar


Chad Darby's courses are the best on Udemy. Thanks him I've got my first work and got promotion on the second one. Good job, my friend! (c) :) - Andrii Hryhoriev


this is my 4th Course with Mr. Darby, and his courses are so special. Organized, clear concepts, amazing material. and the most important his Knowledge of the Topic and he really deliver the information's for us. just amazing. - Ra'ed Abu Sa'da

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In this course, you will learn how to:

JUnit

  • Develop JUnit Tests

  • Set up projects to use JUnit

  • Apply JUnit assertions: Equals/Not Equals and Null/NotNull

  • Apply JUnit assertions: Same/Not Same and True/False

  • Leverage JUnit lifecycle annotations

  • Define custom display names for JUnit tests

  • Check for exceptions and timeouts

  • Define execution order in JUnit tests

  • Perform code coverage analysis for JUnit tests

  • Apply conditionals with JUnit tests


Test Driven Development (TDD)

  • Apply Test Driven Development for build tests and application code

  • Create a failing test first

  • Update your code to make the tests pass

  • Take your tests from RED to GREEN

  • Apply TDD to a coding project

  • Leverage parameterized tests with TDD


Spring Boot Unit Testing Support

  • Explore annotations for Spring Boot Unit Testing support

  • Apply the @SpringBootTest annotation

  • Read Spring Boot application properties and inject values using the @TestPropertySource annotation

  • Perform assertEquals and assertNotEquals

  • Leverage Spring Boot singleton beans and prototype beans


Mocking with Mockito

  • Identify the need for mocking during test development

  • Leverage Mockito in JUnit tests

  • Applying the @MockitoBean annotation for injection (new in Spring Boot 3.4)

  • Throwing exceptions with Mocks


Spring Reflection Utils

  • Identify use cases for applying reflection in your JUnit tests

  • Apply ReflectionTestUtils to access non-public fields and methods

  • Integrate Spring Reflection Utils in your JUnit tests


Database Integration Testing

  • Identify the need for database integration testing during test development

  • Add database setup and clean code using @BeforeEach and @AfterEach

  • Leverage an embedded database to ease with testing setup and maintenance.

  • External SQL statements using @Sql annotation


Testing Spring Boot MVC Web Apps with MockMvc

  • Apply Spring Boot using testing for a Spring MVC CRUD web app

  • Identify use cases for testing Spring MVC @Controller

  • Configure the JUnit test case using @AutoConfigureMockMvc

  • Inject the MockMvc dependency for testing Spring MVC Controllers

  • Send HTTP Requests to Spring MVC Controllers and assert the results

  • Assert the view name returned by the Spring MVC Controller

  • Assert model attributes for the desired values


Testing Spring Boot REST APIs with MockMvc

  • Apply Spring Boot using testing for a Spring REST CRUD API

  • Inject the MockMvc dependency for testing Spring MVC @RestController

  • Send HTTP Requests to Spring MVC @RestController and assert the results

  • Leverage Jackson Object Mapper to send JSON data to REST API endpoint

  • Expect successful response and desired content type

  • Apply JsonPath to verify contents of JSON response



Compared to other Spring Boot Unit Testing courses

This course is up to date and covers recent versions of Spring Boot 3. We make use of modern development tools such as IntelliJ (free version) and Maven.

We are very responsive instructors and we are available to answer your questions and help you work through any problems.

Finally, all source code is provided with the course along with setup instructions.


Student Reviews Prove This Course's Worth

Those who have reviewed the course have pointed out that the instruction is clear and easy to follow, as well as thorough and highly informative. 

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Instructor Details

Chad Darby

Chád (shod) Darby is an author, instructor and speaker in the Java development world. 

Chád is a contributing author to several Java books, including  Professional Java E-Commerce (Wrox Press), Beginning Java Networking  (Wrox Press), and XML and Web Services Unleashed (Sams Publishing). 

Chád has Java certifications from Oracle and IBM. 

He holds a B.S. in Computer Science from Carnegie Mellon University. 

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Reviews

4.8

4,042 ratings on Udemy

Select a bar to show only those reviews.Select the bar again to show every rating.

By Ricardo Mediavilla on 4/5/2026

Excellent quality course on TDD, Java, Spring Boot and unit testing. Highly recommend it for anyone new to the subject or those looking to refresh or stay sharp.

By James Biswell on 4/1/2026

This is an excellent course with comprehensive explanations and learning materials throughout, incrementally increasing its knowledge outcomes and complexity in a carefully thought out and logical way that is very well presented. Thank you!

By Anonymized User on 11/12/2025

Great course for learning JUnit and Mockito. Clear explanations, practical examples, and hands-on exercises make it easy to apply concepts in real projects. Could use a few more advanced scenarios, but overall very helpful and well-structured.

By Juan Felipe Cardona Lora on 11/6/2025

Very good course, I think it covers most of what is used when developing tests in an application. Perhaps one area for improvement would be the number of projects created or divided; it would be ideal to build everything within a single project that grows over time, as this would better illustrate where each library or API is used for certain tests in the context of a real project.

By Daniel Martínez Salvador on 10/5/2025

Very useful and well-explained course. It covers everything you need to write professional tests in Spring Boot 3 with JUnit 5 and Mockito. Ideal for improving your understanding of TDD, MockMvc, and testing with embedded databases. Highly recommended.

By Jose Fidel Diaz on 9/16/2025

Very educational and well-explained course. The examples really help you understand the concepts introduced, and I was able to learn concepts I didn't know before. I love how Chad Darby structures his courses.

By Hardik Gupta on 10/5/2024

This is the nice Course Who Wants to Understand Working Environment of Junit5 and Mockito . Kudos to Instructor Chad Dary for creating such amazing Course.

By Trevor Muhammad on 7/21/2023

A++ level course on unit testing. I am migrating away from using print statements to confirm my program works. Now, I can use unit testing with confidence. I stop after several video sections to build a separate and different program to test my recall of the skills taught.

By Nikhil on 12/11/2022

Chad is a wonderful instructor. He is excellent in explaining everything that is useful in terms of small packages that we need to run the unit tests in this course. I recommend everyone to view and learn the full course.

By Luiz carlos on 11/4/2022

The best course about the subject, the instructor Chad Darby is the best explaining, i already bought the course about springboot and angular and also the courses is really good to understand.

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Read all 4,042 reviews on Udemy

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Quality Score

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Overall Score : 96 / 100