Parallel test case execution with JUnit 5

Question

Is it possible to execute a test case parallel with JUnit 5?

I'm looking for something like threadPoolSize and invocationCount from TestNG:

@Test(threadPoolSize = 3, invocationCount = 10,  timeOut = 10000)

Answer 1

You can write parallel tests with JUnit 5.3. https://junit.org/junit5/docs/current/user-guide/#writing-tests-parallel-execution

@Execution(ExecutionMode.CONCURRENT)
class MyTest {

    @Test
    void test1() throws InterruptedException {
        Thread.sleep(1000);
        System.out.println("Test1 " + Thread.currentThread().getName());
    }

    @Test
    void test2() throws InterruptedException {
        Thread.sleep(1000);
        System.out.println("Test 2! " + Thread.currentThread().getName());
    }
}

// should run simultaneously 

Remember to add the junit.jupiter.execution.parallel.enabled=true to your JUnit configuration

https://junit.org/junit5/docs/current/user-guide/#running-tests-config-params

Add this to your JUnit configuration if you need a fixed thread pool:

junit.jupiter.execution.parallel.config.strategy=fixed
junit.jupiter.execution.parallel.config.fixed.parallelism=4