playwright with javascript tutorial 25 auto retry assertions

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playwright with javascript: auto-retry assertions

playwright is a powerful automation library for testing web applications. one of its useful features is the ability to automatically retry assertions when they fail. this is particularly useful in cases where the application might take some time to load or update its state, causing initial assertions to fail.

in this tutorial, we will explore how to implement auto-retry assertions in playwright using javascript. we'll walk through the setup, create a simple test, and demonstrate the auto-retry functionality.

prerequisites

1. **node.js**: make sure you have node.js installed on your machine. you can download it from [nodejs.org](https://nodejs.org/).
2. **playwright**: if you haven't installed playwright yet, you can do so using npm.



3. **a test framework**: we will use jest for testing, so you need to install it as well.



setting up playwright

create a new directory for your project and navigate to it. inside the directory, create a file called `playwright.config.js` for your playwright configuration.



creating a test file

create a new directory called `tests` in your project root. inside it, create a file named `autoretry.test.js`.



explanation of the code

1. **importing necessary functions**: we import `test` and `expect` from playwright’s testing library.
2. **navigating to a url**: the test navigates to a sample url (`https://example.com`).
3. **auto-retry assertion**: the `expect` function checks if the `h1` element contains the text "example domain". if the element does not contain the expected text, playwright will automatically retry the assertion up to the specified timeout (5000 milliseconds in this case).

running the tests

you can run your tests using the following command:



advanced auto-retry assertions

you can customize the retry behavior further by using the `tobevisible`, `tohavecount`, and other assertions. playwright automatically retries these assertions when they fail ...

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