How do you ensure test scalability?

To ensure test scalability, it is important to:

• Modularity and reusability: write tests and test utilities in a way that they can be easily extended and maintained.
• Parallelization: run tests in parallel to speed up the overall execution.
• Test isolation: each test should be independent to avoid side effects and simplify debugging.
• Use of data-driven approach: separate data from test logic for easy addition of new scenarios.
• Infrastructure automation: use CI/CD for automatic test execution upon changes.
• Monitoring and analysis of results: quickly identify problematic areas and optimize tests.

Example: for automating UI tests, frameworks supporting parallel execution (e.g., Playwright) can be used, and test data can be stored in separate JSON files for easy extension of scenario sets.