Schema Reader | Bondar Academy

Lesson Summary

In this lesson, we will create a custom schema validator for Playwright, as it does not support schema validation by default. Our initial step will involve developing a function to read the schema from our project. Resources and References During research, the approach by Butch Mayhew was particularly insightful. His website, playwrightsolutions.com , contains numerous articles on API automation, including a detailed example on validating JSON schema. Project Structure To manage our schemas effectively, we will: Create a new folder named response schemas in the root of the project. Organize schemas by creating subfolders for each endpoint, such as tags and articles . Under each endpoint folder, separate schemas based on the HTTP methods (GET, POST, PUT). Creating the Schema Validator We will create a new file named schema validator.ts in the util folder. The following steps outline the implementation: Import necessary modules: fs from fs/promises and path . Define an asynchronous function loadSchema to read the schema from a file. Use fs.readFile to read the file content and convert it to a JSON object. Implement error handling using a try-catch block to manage potential file reading errors. Validating the Schema We will create another function, validateSchema , which will combine the directory name and file name to construct the full path for the schema file. This function will utilize loadSchema to retrieve and print the schema. After implementing the above steps, we will test the functionality to ensure the schema is read correctly and printed to the console. In conclusion, this lesson sets the foundation for schema validation in Playwright, and we will continue to build upon this in future lessons.