In Short: What's JUnit 5

 

Source URL: https://stackoverflow.com/a/58384499

JUnit 5 = JUnit Platform + JUnit Jupiter + JUnit Vintage

Source URL: https://junit.org/junit5/docs/current/user-guide/#overview-what-is-junit-5

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JUnit 5 = JUnit Platform + JUnit Jupiter + JUnit Vintage

The JUnit Platform serves as a foundation for launching testing frameworks on the JVM. It also defines the TestEngine API for developing a testing framework that runs on the platform. Furthermore, the platform provides a Console Launcher to launch the platform from the command line and a JUnit 4 based Runner for running any TestEngine on the platform in a JUnit 4 based environment. First-class support for the JUnit Platform also exists in popular IDEs (see IntelliJ IDEA, Eclipse, NetBeans, and Visual Studio Code) and build tools (see Gradle, Maven, and Ant).

JUnit Jupiter is the combination of the new programming model and extension model for writing tests and extensions in JUnit 5. The Jupiter sub-project provides a TestEngine for running Jupiter based tests on the platform.

JUnit Vintage provides a TestEngine for running JUnit 3 and JUnit 4 based tests on the platform.

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Source URL: https://caster.io/lessons/junit5-introduction-overview

Video Briefing

What's JUnit Platform?

Source URL: https://stackoverflow.com/a/55312862

You only need the launcher when you want to start a JUnit platform run programmatically, i.e. outside an IDE, build tool or console runner.

In other words: the launcher is the API being used by IDEs and build tools