Load Testing with Playwright
This tutorial shows you how to efficiently set up a browser-based load test using existing Playwright tests in the Step automation platform.Get Step SaaS for free to follow this tutorial
In this tutorial, we will use a sample online store application based on OpenCart as our Application Under Test (AUT). To implement our load test, we will reuse existing Playwright tests written in Java that simulate a typical user visit to our application under test.
1. Check out the sample project
Clone the sample project from GitHub:
git clone https://github.com/exense/step-samples.git
Optionally, run the JUnit tests locally:
cd step-samples/keywords/java/demo-playwright-keyword mvn clean compile test
Create the Keyword Package that will be uploaded to Step:
mvn clean package -DskipTests
After execution of this command, a JAR file named demo-playwright-keyword-0.0.0.jar is generated and located in the “target” directory of the project. This JAR file will be used in the subsequent steps of this tutorial.
2. Configure the load test in Step
Once you’ve scaled the Agents, click Open in Step to open the Step application and carry on with the tutorial.
2.1. Upload the Keyword Package
Upload the Keyword Package built previously. The Keyword Package contains the automation steps that will be integrated in our load test.
- Go to the Keywords section
- Click on the Upload Package button
- Select the “demo-playwright-keyword-0.0.0.jar” as the Package file
- Click Save
2.2. Create the Plan
Create a new Plan using the TestScenario template:
- Go to the Plans section
- Click on the New Plan (+) button
- Name the Plan, e.g. Load test OpenCart
- Select “TestScenario” as the Template
- Click Save and edit
2.3. Configure the load test
For our load test, we will create a ThreadGroup that will repeatedly execute a task on OpenCart to simulate high loads.
- In the Controls section of the Component tabs, click on the New ThreadGroup (+) button to add a ThreadGroup child to the Plan. Hint: use the filter function in the Component tabs to easily find controls.
- Select the Keyword “Buy MacBook in OpenCart” from the Keywords section in the Component tabs.
- Configure the ThreadGroup with the following parameters:
- Number of Threads: 10 So the ThreadGroup runs 10 threads in parallel.
- Number of iterations per thread: (empty): There should not be a limit on the number of iterations per thread;
- Maximum duration (ms): 600000: The ThreadGroup should terminate after a maximum of 10 minutes (600000 ms).
3. Run and analyze the test
3.1. Run the load test
In Step, click Start Execution and confirm in the opened modal.
3.2. Analyze the results
Once the execution has started, you will be redirected to the execution page.
In the Performance tab, you can explore detailed performance metrics:
There you’ll find all metrics relative to the transactions of your Playwright scripts:
- The execution time of our Keyword “Buy MacBook in OpenCart”
- No custom measurements were defined for this Playwright script sample. You may easily add some, following this documentation.
3.3. Review the transaction statistics
At the bottom of the Performance view, you’ll find an aggregation of performance metrics for the selected time frame:
This tutorial serves as a starting point for those interested in performing load tests using Playwright scripts. Step enables you to reuse automation artifacts across the whole DevOps cycle, and load testing is just one aspect of it. Further learning and exploration on performance testing, synthetic monitoring and robotics can be found in other tutorials and resources.
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