In-depth tutorials and comparisons for testing tools and frameworks — Playwright, Cypress, Selenium, Robot Framework, and more.
Test Automation
Django ships with a solid test framework built on Python's unittest.TestCase. pytest-django adds pytest's ergonomics on top — fixtures, parametrize, concise assertions — without replacing Django's test infrastructure. Choosing between them shapes how your test suite reads and scales. Setup pip install pytest pytest-
Test Automation
Django REST Framework (DRF) provides APIClient and APITestCase — a layer above Django's test client with JSON handling and authentication helpers. Combined with pytest-django, you get a fast, ergonomic API testing workflow. Setup pip install djangorestframework pytest pytest-django Copy # settings/test.py INSTALLED_APPS = [ ... 'rest_framework&
Test Automation
Django's ORM is the heart of most applications — and the source of many bugs. N+1 queries, missing indexes, broken managers, and subtle transaction behaviors are best caught at test time. This guide covers strategies for testing ORM queries, model logic, and test data setup. Setup pip install
Test Automation
Creating test data manually with Model.objects.create(...) doesn't scale. When models have 10+ fields, required foreign keys, and complex relationships, tests become maintenance nightmares. factory_boy and model_bakery solve this with generated test data that respects your model's structure. factory_boy factory_boy generates
Test Automation
Django 3.1+ supports async views, and Django Channels adds WebSocket and long-polling support. Testing async code requires async test runners and clients — but the patterns are familiar once you see them. Setup pip install django channels pytest pytest-django pytest-asyncio Copy # pytest.ini [pytest] DJANGO_SETTINGS_MODULE
Test Automation
The Saga pattern is how you implement long-running business transactions across multiple microservices without distributed transactions. Instead of locking resources across services (which doesn't scale and creates tight coupling), a saga breaks the transaction into a sequence of local transactions — each with a compensating transaction to undo
Test Automation
RTOS-based firmware has a reputation for being untestable. Tasks run concurrently, interrupts fire asynchronously, queues link components together, and the whole system only makes sense when everything is running simultaneously on real hardware. But "untestable" mostly means "nobody has tried systematically." With the right techniques,
Test Automation
Desktop app CI is harder than web app CI. You need real operating systems — not just Linux containers — because your app runs on Windows, macOS, and Linux with platform-specific behavior at every layer: native menus, file dialogs, WebView implementations, code signing, and installer formats. GitHub Actions provides hosted runners
Test Automation
Testing a DeFi protocol is unlike testing any other software. Your contract interacts with Uniswap liquidity pools, Chainlink price oracles, Aave lending markets, and Compound interest rate models—all live, all changing, all outside your control. A naive implementation collapses when prices move, fails when pools are illiquid, or gets
Test Automation
Your application code can be perfectly correct, but if the database schema doesn't enforce the invariants you depend on, you have a latent data integrity problem waiting to surface. Unique constraints that weren't added, foreign keys that got dropped for performance reasons, nullable columns that your
Test Automation
Mocking is the backbone of isolated unit testing. When your UserBloc depends on a UserRepository that hits a network, you don't want real HTTP calls in tests — you want a fake that returns exactly what you tell it to. Dart has two dominant mocking libraries: mockito (the established
Test Automation
Asynchronous code is everywhere in Dart — HTTP calls, file I/O, timers, isolates. Testing it correctly requires understanding how Dart's event loop works and how the flutter_test / test package interacts with it. This post goes deep on testing Future, Stream, Completer, time-sensitive code with fake_async,