Parallel Execution of Tests

👓 What did you see?

When Running Cucumber Tests with parallel strategy as fixed and parallelism set to 4. I am seeing more than 8 tests running in parallel.

✅ What did you expect to see?

I should see only 4 tests to run in parallel mode.

📦 Which tool/library version are you using?

I am using cucumber-junit-platform-engine with version 7.2.3

🔬 How could we reproduce it?

we need to enable parallel execution and set the parallel execution strategy to fixed.

cucumber.execution.parallel.enabled=true
cucumber.execution.parallel.config.strategy=fixed
cucumber.execution.parallel.config.fixed.parallelism=4

Steps to reproduce the behavior:

1. Install ‘7.2.3’ version of cucumber, cucumber-junit-platform-engine using the pom file

 <dependency>
            <groupId>io.cucumber</groupId>
            <artifactId>cucumber-java</artifactId>
            <version>${cucumber.version}</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>io.cucumber</groupId>
            <artifactId>cucumber-junit-platform-engine</artifactId>
            <version>${cucumber.version}</version>
            <scope>test</scope>
        </dependency>

1. Add cucumber tests
2. Add the config mentioned above to junit-platform.properties file

cucumber.plugin=pretty
cucumber.glue=PATH_TO_STEP-Definitions
cucumber.filter.tags=@Smoke and not (@Ignore)
cucumber.publish.enabled=false

cucumber.execution.parallel.enabled=true
cucumber.execution.parallel.config.strategy=fixed
cucumber.execution.parallel.config.fixed.parallelism=4

1. run the cucumber tests using runner file

@Suite
@IncludeEngines("cucumber")
@SelectClasspathResource("features")
public class SmokeTestRunnerTest {

}

📚 Any additional context?

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[mpkorstanje]

Should probably add that to the docs.

[mpkorstanje]

@thomasrapadmi I think I may have found your problem somewhat by accident. If you are on Java 8, it is not possible to configure the max pool size of the fork join pool used by JUnit. So the custom strategy will not work. Consider upgrading your Java version.