Introduction to Java unit testing with JUnit5 framework

Name: Introduction to Java unit testing with JUnit5 framework
Rating: 4.2 (36 reviews)

Hands-on experience with JUnit5 for absolute beginners

Created byDmitrijs Finaskins

Last updated 4/2020

English

What you'll learn

JUnit5 framework basics
How to create unit tests for a given class
How to run unit tests
How to interpret results of unit tests
How to make changes in the class code and/or unit tests to fix failing tests
How to find out whether all methods are covered by unit tests

Course content

2 sections • 9 lectures • 1h 13m total length

Course introduction3:40
In this introduction lecture we will talk about topics which are covered in this course. Presentation is also available for download in the resource section
Why do we need unit testing6:48
In this lecture we will discuss why unit testing is so important and we should create a test class for each and every class in our application. Presentation is also available for download in the resource section
First unit test creation10:36
In this lecture we will define our first unit test using JUnit5 framework for a simple Java class

Create a new Java class to write tests for10:36
In this lecture we create a new mock Java class Car, define class variables and methods. In the next lectures we will use this class to explore in more details the capabilities of JUnit framework
Basics methods of JUnit5 for tests creation7:40
In this lecture you will learn how to use methods defined in JUnit5 to assert expected vs actual result:
assertEquals(primitive, primitive)
assertEquals(Object, Object)
assertArrayEquals(Object[], Object[])
assertTrue(boolean expression)
assertFalse(boolean expression)
Basic JUnit annotations6:43
In this lecture you will learn some commonly used annotations in JUnit and when to use each of them:
@Test
@Disabled
@DisplayName
@BeforeEach
Unit tests for a given class15:03
In this lecture we will create a test class and define unit tests for each method of our class Car
How to fix failed tests9:56
In this lecture you will learn what are some common reasons why unit tests could fail and what do to fix them
Code coverage with tests2:54
In this lecture you will learn how to find out how many methods / code of your classes are covered with unit tests

Requirements

Java8+ basic concepts and hands-on experience
Basic knowledge of Intellij Idea IDE

Description

In this course you will be guided through the basics of Java unit testing using JUnit5 framework. You do not need to have any prior JUnit experience or knowledge to take this course. All you need to have - willingness to learn some new exiting things about unit testing on Java using JUnit5 framework and some time to write unit tests along with me.

Some basic Java knowledge is required, you need to be familiar with some basic concepts like class, method, variables, objects, etc.

Java 11 LTS is used in this course and examples are shown in IntelliJ IDEA. But all taught content will work fine on later versions of Java.

We will define a basic Java class and for each method of this class we will create unit tests, so we could be sure everything works as it should.

The most important topics covered in this course includes

Explanation why we should include unit tests in each our application
How to define a test class, where all unit tests will reside
Important annotations used in test classes
How to interpret unit tests results
How to fix failed tests

I hope you will really enjoy opening for yourself a new entertaining world of unit testing on Java!

Who this course is for:

Java developers of all levels with no prior knowledge in unit testing

Introduction to Java unit testing with JUnit5 framework

What you'll learn

Explore related topics

Course content

Introduction to unit testing3 lectures • 21min

Unit tests creation for a given class6 lectures • 53min

Requirements

Description

Who this course is for: