Master JUnit 5 & Mockito: Complete 2025 Testing Guide

2025 Mastering JUnit 5 and Mockito: From Basics to Advanced Testing

Master Unit Testing and Mocking with JUnit 5 and Mockito for Reliable Java Applications

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Last Updated: 2025-01-24 09:01:55 English Course Type: Self Learning

The fundamentals of JUnit 5 and how it differs from earlier versions.
Writing unit tests using JUnit 5 annotations and assertions.
Understanding Mockito and its role in mocking dependencies.
Implementing Test-Driven Development (TDD) to enhance code reliability.
Testing Spring Boot applications with JUnit 5 and Mockito.
Handling exceptions, mocking methods, and verifying interactions with Mockito.
Writing database-related tests using JPA and ensuring data consistency.
Creating integration tests to validate end-to-end functionality.
Debugging test failures and improving application quality.
Best practices for test automation and writing maintainable test cases.

This comprehensive course is designed to help developers, testers, and software engineers master the art of unit testing and mocking with JUnit 5 and Mockito. Through hands-on examples, detailed explanations, and best practices, you'll gain a deep understanding of unit testing, test-driven development (TDD), annotations, assertions, mocking techniques, and exception handling. Whether new to testing or looking to refine your skills, this course provides everything you need to build robust and reliable applications.

Basic understanding of Java programming and object-oriented concepts.
Familiarity with IDEs like IntelliJ IDEA, Eclipse, or Java IDE.
A basic understanding of database operations (JPA or JDBC) is helpful but not mandatory.
Eagerness to learn practical unit testing and mocking techniques.

Java developers and software engineers looking to improve their testing skills.
QA engineers and testers are eager to understand and implement unit testing in Java.
Students and beginners interested in learning the basics of JUnit 5 and Mockito.
Professionals aiming to implement Test-Driven Development (TDD) practices in real-world projects.
Developers working on Spring Boot applications who want to build more reliable and maintainable code.

Section 1 : Module 1 13 Lectures 00:38:19
Lecture 1 :
introduction Practical Junit Mockito Preview
Lecture 2 :
What is Unit Testing and Test Driven Development
Lecture 3 :
What is Junit
Lecture 4 :
What are Annotations in Java
Lecture 5 :
BeforeEach Annotation
Lecture 6 :
AfterEach Annotation
Lecture 7 :
BeforeAll and AfterAll Annotation
Lecture 8 :
Test Annotation
Lecture 9 :
Disabled Annotation
Lecture 10 :
DisplayName Annotation
Lecture 11 :
Parameterized Test and ValueSource Annotation
Lecture 12 :
Repeated Test Annotation
Lecture 13 :
Tag Annotation
Section 2 : Module 2 3 Lectures 00:11:35
Lecture 1 :
Life cycle of a Junit Test
Lecture 2 :
What is meant by Assertion
Lecture 3 :
Different Assertion methods
Section 3 : Module 3 7 Lectures 00:45:42
Lecture 1 :
Package structure and Dependency
Lecture 2 :
Writing Our First Junit and Mockito Test
Lecture 3 :
Applying BeforeEach and AfterEach to our Test scenarios
Lecture 4 :
Applying BeforeAll and AfterAll to the test scenarios
Lecture 5 :
Code Coverage By Writing Test for Different Scenarios
Lecture 6 :
Static Import of Assert Function
Lecture 7 :
Writing Test for Complex Object with multiple Assertions
Section 4 : Module 4 4 Lectures 00:34:39
Lecture 1 :
Usage of Mock Annotation to avoid dependencies getting null value
Lecture 2 :
Using When Then to bypass the dependency in our testing logic
Lecture 3 :
Test case for Get All Properties method in controller
Lecture 4 :
Test case for update price method in controller
Section 5 : Module 5 6 Lectures 00:44:10
Lecture 1 :
Test case for Converter DTO to Entity
Lecture 2 :
Test case for Converter Entity to DTO
Lecture 3 :
Testing Saved Property of Service Layer
Lecture 4 :
Test case for Get All Properties in Service
Lecture 5 :
Test case for Update All Properties in Service
Lecture 6 :
Test case for Update Descriptionfor Property in Service
Section 6 : Module 6: 3 Lectures 00:15:13
Lecture 1 :
Testing Exception Scenario -Part-1
Lecture 2 :
Testing Exception Scenario - Part-2
Lecture 3 :
Testing the Model or DTO classes

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AKHIL VYDYULA,

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