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How do you test Python web applications?

Senior Python
Quick Answer Python web testing: pytest + pytest-django or pytest-flask. Django TestCase uses a test database (auto-rollback per test). APIClient (DRF) or test_client() for HTTP testing. Mock external services with unittest.mock or responses library. Factory Boy for test data fixtures. Locust or k6 for load testing. Selenium/Playwright for end-to-end browser testing.

Answer

Unit tests for logic, integration tests for endpoints.
Use framework test clients to simulate requests.
Mock external dependencies.
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