Test automation tutorials, frameworks, and tools — from first scripts to full CI/CD pipelines.
Test Automation
Most cloud testing platforms focus on execution: give us your tests, we run them on real devices, here are the results. Perfecto goes further with ContinuousQ—a quality management layer on top of the execution infrastructure. ContinuousQ is where Perfecto makes its strongest case for large enterprise teams that need
Test Automation
Cloud device testing has become the backbone of modern mobile QA. Running tests against real hardware—without maintaining a physical device lab—is the value proposition every cloud platform pitches. Perfecto (by Perforce) is one of the older players in this space, with an enterprise focus that shapes everything from
Testing Strategy
Black-box and white-box testing describe two fundamental perspectives on how tests are designed: without knowing the internal implementation, or with full knowledge of it. Both perspectives are essential; neither alone is sufficient. Understanding the distinction helps you design better tests, allocate test effort appropriately, and communicate clearly about
Test Automation
Visual regression testing catches the bugs your unit tests miss — the button that shifted 4 pixels, the font that reverted to system default, the card layout that broke on a specific viewport. Two platforms dominate this space: Percy (by BrowserStack) and Chromatic (by the Storybook team). Both take screenshots, diff
Test Automation
Percy by BrowserStack is a visual testing platform that renders your application in real browsers across multiple viewports and compares screenshots against a baseline. Unlike local snapshot testing, Percy handles cross-browser rendering differences, stores all snapshot history in the cloud, and integrates with pull request workflows through GitHub, GitLab,
Test Automation
Bazel is a build and test tool originally developed at Google to handle monorepos at extreme scale.
BDD
Every BDD framework comparison eventually devolves into religious arguments about syntax or tooling preferences. The more useful framing: pick the framework that matches your team's language ecosystem, then learn its constraints. The behavior-driven development value — collaboration, readable specs, living documentation — comes from the process, not the tool.
Test Automation
Running BackstopJS on a developer's machine is a good start. Running it automatically on every pull request is what makes it useful. This guide covers full CI integration for both GitHub Actions and GitLab CI, including Docker mode for rendering consistency, report publishing, and a sane baseline update
Test Automation
BackstopJS and Percy both solve visual regression testing, but they take fundamentally different approaches. BackstopJS is open source, self-hosted, and free. Percy is a cloud SaaS product with a polished review UI and BrowserStack's infrastructure behind it. The right choice depends on your team size, budget, and
Test Automation
Visual regression testing catches the bugs that unit tests and integration tests never see — a misaligned button, a font that loaded wrong, a layout that collapsed on tablet. BackstopJS is the most popular open-source tool for this job. It takes screenshots, compares them to approved baselines, and fails your
Test Automation
The most common complaint from teams adopting BackstopJS is false positives: tests that fail not because the UI changed but because the screenshots look slightly different depending on who ran them. A developer on macOS gets one rendering; the CI runner on Ubuntu gets another. The pixels do not match
Test Automation
A working BackstopJS setup is mostly a well-crafted backstop.json. The default generated by backstop init gets you started, but real applications need more: authenticated pages, dynamic content you want to hide, interactions before capture, and engine tuning. This guide covers every significant configuration option with practical examples. The