how junit run

[Zhouqiee]

java programs have an entry method that executes logic for main() as main()-> execution logic. I wonder how junit becomes junit-> execution logic by replacing main(). Does it encapsulate a main()? Or it is not implemented by a java program, but by a development tool similar to eclipse

[jbduncan]

By my understanding, the command-line version of JUnit 5 has its own main() method which sets up and starts all the tests.

By comparison, I believe tools like Gradle, Maven, Eclipse and IntelliJ (that is, tools written in JVM programming languages) start JUnit 5 through the JUnit Platform Launcher API.

I'm guessing that tools written in or configured with non-JVM programming languages run the command-line version of JUnit 5 as an external JVM process.

[sormuras]

Here's an example how to compile classes (main and test) and run JUnit with only using tools shipping with the JDK and standalone distribution of JUnit.

• https://stackoverflow.com/questions/52373469/how-to-launch-junit-5-platform-from-the-command-line-without-maven-gradle/52373592#52373592