How to Run WebUI Feature Files Simultaneously Across Browsers?

Executing WebUI Feature Files Against Multiple Browsers in Parallel: A Comprehensive Guide

Introduction

Parallel testing and distributed testing are essential for efficient and scalable WebUI automation. This article will delve into strategies for executing WebUI feature files against multiple browsers using these techniques.

Parallel Execution with Scenario Outline and Parallel Runner

Karate's parallel runner allows executing each row of an Examples table concurrently. To utilize this for browser parallelization:

1. Move the browser driver configuration (e.g., type) into the feature file.
2. Create a Scenario Outline where type is a parameter.
3. Define an Examples table with rows representing different browser types.

Example:

<code class="java">Scenario Outline: &lt;type&gt;
    * def webUrlBase = karate.properties['web.url.base']
    * configure driver = { type: '#(type)', showDriverLog: true }

    * driver webUrlBase + '/page-01'
    * match text('#placeholder') == 'Before'
    * click('{}Click Me')
    * match text('#placeholder') == 'After'</code>

Examples:

<code class="java">| type |
| ----------- |
| chrome |
| geckodriver |</code>

In this scenario, Karate will execute the feature file in parallel for each browser specified in the Examples table.

Special Feature with Scenario Outline

Alternatively, you can create a "special" feature that includes a Scenario Outline with the configuration and call the main feature.

Example:

<code class="java">Scenario Outline: &lt;config&gt;
    * configure driver = config
    * call read('main.feature')</code>

Examples:

<code class="java">| config! |
| ----------- |
| { type: 'chromedriver' } | 
| { type: 'geckodriver' }  | 
| { type: 'safaridriver' } |</code>

Other Considerations

• You can opt to reuse the same browser instance for all tests to improve efficiency. Karate's CI regression test demonstrates this approach.
• For additional strategies, refer to Stack Overflow answers provided in the reference section below.

References:

• [Reusing Browser Instance for Parallel Testing](https://stackoverflow.com/a/66762430/143475)
• [Alternative Parallel Execution Approaches](https://stackoverflow.com/a/61685169/143475)
• [Other Solutions on Stack Overflow](https://stackoverflow.com/a/62325328/143475)

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