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3. JUnit 5 – new approach, new functionalities. Part 2

The step towards JUnit 5

 

In order to use Junit 5 in a Java project, the following dependencies must be added to the Maven configuration:

 

 

Below are the most important differences between Junit 4 and Junit 5:

 

Architecture

 

JUnit 4	JUnit 5
Monolithic	Junit Platform Junit Jupiter Junit Vintage

 

Java versions necessary for running

 

JUnit 4	JUnit 5
At least Java 5	At least Java 8

 

Annotations

 

JUnit 4	JUnit 5
@BeforeClass, @AfterClass @Before, @After @Ignore @Category	@BeforeAll, @AfterAll @BeforeEach, @AfterEach @Disable @Tag

 

First Junit 5 test

  

Unlike Junit 4, the test class and test methods can be package private. A simulated test looks like this:

 

 

A few remarks about the test above:

 

• The method annotated with @BeforeAll will be executed once, before the tests are running.
• The method annotated with @BeforeEach will be executed every time, before a test is ran.
• The methods annotated with @Test will be executed one by one, in order to check functionality.
• The method annotated with @AfterEach will be executed every time after running a test.
• The method annotated with @AfterAll will be executed once, after running all the tests.

Tudose, Florin-Catalin Tudose

Java Champion; Java Chapter Lead; Author at Pluralsight and Manning