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.

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Catalin Tudose
Java and Web Technologies Expert