How to Execute Cucumber Feature Files in Parallel Using the Cucumber-JVM-Parallel-Plugin?

Executing Cucumber Feature Files in Parallel

When working with multiple feature files written separately, it is beneficial to run them concurrently to save time and optimize testing efforts. Below is a guide to executing cucumber feature files in parallel, using a specialized plugin and configurations.

Solution using Cucumber-JVM-Parallel-Plugin

1. Add the Plugin:
   Start by integrating the cucumber-jvm-parallel-plugin into your project's pom.xml file. This plugin allows dynamic test runner generation and parallelizes feature file execution.
2. Configuration:
   Configure the plugin in your pom.xml file, specifying essential details such as the project's glue code, features directory, output directory, and desired parallelism settings. You can customize the naming scheme and parallel execution strategy based on your requirements.
3. Test Runner Invocation:
   Utilize the Maven Surefire plugin to invoke the generated test runner classes. Configure the forkCount property to specify the number of parallel threads, ensuring it aligns with your hardware capabilities and available web browser instances.

Shared WebDriver

To run your tests effectively in parallel, establish a shared WebDriver instance. Avoid implementing the driver.quit() method, as the shutdown hook handles closing the web browser.

Hardware and Configuration Considerations:

For optimal parallel execution, ensure your hardware meets the demands of running multiple browser instances simultaneously. Additionally, start the Selenium Hub with -DPOOL_MAX=512 (or a higher value) to prevent critical memory issues when working with a large number of nodes.

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