Test automation tutorials, frameworks, and tools — from first scripts to full CI/CD pipelines.
Test Automation
React 19 shipped a handful of hooks that change how you think about async state, form handling, and data loading. Most of your existing tests still work — but the new hooks introduce async patterns that need deliberate test strategies. This guide covers testing useOptimistic, useFormStatus, and the new use() hook
Test Automation
Partial Prerendering (PPR) is Next.js 15's hybrid rendering strategy: the static shell of a page is served instantly from the CDN edge, while dynamic content streams in behind Suspense boundaries. A single page can have both a prerendered header and a live-fetched product listing — without a
Test Automation
Next.js 15 App Router introduced a file-based convention that determines how your application behaves in loading, error, and layout states. Each file — layout.tsx, loading.tsx, error.tsx, not-found.tsx — plays a distinct role, and each one needs tests that match its purpose. This guide covers how
Test Automation
RabbitMQ occupies a different niche from Kafka — it excels at task queues, request-reply patterns, and routing scenarios where Kafka would be overkill. Spring AMQP provides excellent abstractions for working with RabbitMQ, but testing those abstractions correctly requires careful setup. The wrong approach leads to tests that pass in isolation
Test Reporting
At a certain scale, spreadsheets and CI artifact tabs break down as test reporting solutions. When dozens of QA engineers run thousands of tests daily across multiple projects, you need a dedicated test reporting platform. ReportPortal is the open-source answer to that problem. What Is ReportPortal? ReportPortal is a
Background Jobs
Background job systems fail in complex ways. A job can run twice due to a retry. A downstream service can be slow, causing queue buildup. A crash during execution can leave data in an inconsistent state. Testing these scenarios requires specific patterns that go beyond simple pass/fail test cases.
Python
Celery powers background task processing in Python applications. It's powerful but notoriously tricky to test because of its asynchronous, distributed nature. The good news: Celery ships with testing infrastructure that makes most scenarios straightforward. The tricky parts — retries, chains, countdown — require some extra care. Core Testing Modes CELERY_
Background Jobs
Faktory is a language-agnostic background job server created by Mike Perham (the creator of Sidekiq). Unlike Sidekiq, which is Redis-based and Ruby-only, Faktory is a standalone server with client libraries for Ruby, Go, Python, JavaScript, and other languages. Testing Faktory workers shares concepts with other queue systems
Ruby on Rails
Background jobs are a core part of most Rails applications — email delivery, image processing, webhook dispatch, data export. But they're also one of the most commonly undertested parts of a codebase. Jobs execute asynchronously in production, making failures easy to miss and hard to debug. Sidekiq is the
Background Jobs
Scheduled jobs and cron tasks are notoriously difficult to test. They run at specific times, interact with the real world (databases, APIs, files), and often involve time-sensitive logic. A monthly billing job that ran at 2:01 instead of 2:00 for a daylight saving transition can cause real
Node.js
BullMQ is the modern successor to Bull for Node.js background job processing. It uses Redis for persistence and supports advanced patterns: priorities, rate limiting, flows (parent/child jobs), and job groups. Testing BullMQ requires understanding when to use real Redis versus mocks, and how to make workers testable. Testing
Test Reporting
JUnit XML is the lingua franca of test reporting. Originally a JUnit (Java) format, it's been adopted by every major test framework across every language. GitHub Actions, GitLab CI, Jenkins, CircleCI, and most other CI platforms can parse and display JUnit XML natively. Understanding how to generate and