Retries and Test Flakiness in Playwright
In this video you will learn how to #rerun the failed test cases and Identify the Flaky tests in #playwright
In the course of this video you will learn following -
1)Execute a saucedemo test scenario using #vscode
2)Set #retries in Playwright config file and also will pass it to "npx" command
3)How to simulate #flakiness
4)Analyze playwright report.
Flakiness in automated tests refers to intermittent failures or inconsistencies in the test results, where a test may pass or fail inconsistently across multiple test runs. Flaky tests can be frustrating as they make it difficult to trust the test results and can waste time and resources.
When working with Playwright, an open-source library for browser automation, you may encounter flakiness due to various factors such as timing issues, network conditions, race conditions, or the stability of the tested application itself. Here are a few tips to help identify and mitigate flakiness in Playwright tests:
Reproducibility: Make sure your test environment is consistent and repeatable. Set up the necessary dependencies and ensure the same conditions are present for each test run.
Isolation: Ensure that your tests are independent of each other and don't have shared dependencies or state. Flakiness in one test should not impact the results of other tests.
Test data: Use stable and reliable test data that doesn't change frequently. This helps eliminate variability and ensures consistent test results.
Wait for stability: If your test interacts with dynamic elements on the page, such as AJAX requests or animations, use appropriate waiting mechanisms like page.waitForSelector() or page.waitForTimeout() to ensure that the page is in a stable state before performing any assertions or actions.
Retries and timeouts: Configure appropriate timeouts and retry mechanisms in your test framework. Playwright provides options like page.setDefaultTimeout() to set a timeout for actions and test.retry() to automatically retry failed tests.
Debugging and logging: When a test fails, gather additional information by logging relevant details, such as page content, network requests, or console logs. This can help identify the root cause of the flakiness.
Network conditions: Flaky tests can sometimes be caused by network-related issues. Consider using network emulation features provided by Playwright to simulate different network conditions and see if the flakiness persists under different scenarios.
Test stability: Regularly review and update your tests to ensure they are stable and reliable. As your application evolves, tests may need to be modified to account for changes in the UI or functionality.
Continuous Integration (CI): Incorporate your Playwright tests into a CI/CD pipeline to run them automatically on every code change. This helps identify flakiness early and ensures that any breaking changes are caught before deployment.
By following these practices, you can minimize flakiness in your Playwright tests and improve the reliability and trustworthiness of your test suite. Remember that flakiness can be complex and may require investigation into specific scenarios to identify the underlying causes.
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