[SUREFIRE-1918] Parallel execution doesn't work with junit-vintage-engine

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.22.2, 3.0.0-M5
• Component/s: Junit 4.7+ (parallel) support
• Environment: Apache Maven 3.8.1
• Assignee: Unassigned
• Reporter: Martin Schneider
• Created: 06/Jun/21 04:56
• Updated: 13/Aug/21 13:35

Description

Tests don't get executed in parallel with JUnit's vintage engine.

The following configuration executes them serially:

<dependency>
  <groupId>org.junit.vintage</groupId>
  <artifactId>junit-vintage-engine</artifactId>
  <version>5.7.2</version>
 </dependency>

...

<plugin>
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-surefire-plugin</artifactId>
  <version>3.0.0-M5</version>
  <configuration>
    <parallel>methods</parallel>
    <useUnlimitedThreads>true</useUnlimitedThreads>
  </configuration>
</plugin>

 

Replacing the vintage engine with Junit 4 executes tests in parallel as expected:

<dependency>
  <groupId>junit</groupId>
  <artifactId>junit</artifactId>
  <version>4.13.2</version>
</dependency>

 

I have attached a minimal failing example. mvn test will produce the following output:

[INFO] -------------------------------------------------------
 [INFO] T E S T S
 [INFO] -------------------------------------------------------
 [INFO] Running ParallelTest
 Test 1 running in main
 Test 2 running in main
 Test 3 running in main
 Test 4 running in main

The expected output (and what I get with JUnit 4) would be:

[INFO] -------------------------------------------------------
 [INFO] T E S T S
 [INFO] -------------------------------------------------------
 [INFO] Running ParallelTest
 Test 1 running in pool-2-thread-1
 Test 3 running in pool-2-thread-3
 Test 4 running in pool-2-thread-4
 Test 2 running in pool-2-thread-2