Testing/E2E

Functional tests check whether code runs, not whether it looks right. Visual regression testing closes exactly that gap: screenshots of components and pages are compared against a maintained baseline, so unintended CSS changes, broken layouts and rendering bugs surface before they ever go live.

Mock Service Worker intercepts HTTP requests at the network boundary before they're even sent, instead of replacing individual JavaScript functions like Axios calls. That makes Vue tests more realistic, since the full request-response cycle runs, including status codes, headers, and error paths, without the test code needing to know which HTTP library a component uses internally.

A failover mechanism that has never been tested under realistic conditions is only an assumption about resilience, not proof of it. Systematic failover testing with controlled failure simulations, clear metrics like RTO and RPO, and a repeatable test plan uncovers exactly the gaps that would cause long outages in a real emergency.

A single changed design token can shift dozens of components at once without a single unit test noticing. Visual regression tests make exactly these shifts visible before they reach production, through automated screenshot comparisons right inside the CI pipeline.

Testing Magento and Hyvä stores in Chromium alone hides rendering differences that real customers actually hit in Firefox or Safari. Playwright makes it simple to run the same test suite against multiple browser engines, but the real payoff only comes from a deliberate browser matrix built on real analytics data instead of default settings.

Maintaining a separate test copy for every language and store means losing both overview and runtime at the same time. A single store-context parameter in Cypress or Playwright is enough to check languages, currencies, and catalog differences, catching typical store-scope configuration bugs reliably before they reach production.

A plain console output with green and red checkmarks answers whether a test run succeeded, but delivers neither the visual context needed for a failure nor a way to track how a test suite develops over several weeks. Allure Report closes this gap by turning the structured results from Cypress, Playwright, or practically any other test framework into an interactive, searchable HTML dashboard that brings screenshots, videos, step-by-step logs, and trend charts across multiple runs together in one central place.

Docker in GitLab CI is powerful, but the configuration is full of pitfalls: the wrong runner type, insecure Docker-in-Docker, build caches that never hit, and artifacts that transfer unnecessary megabytes. Once you understand the mechanisms, you build pipelines that finish in three minutes instead of thirty.

PHPStorm supports three interpreter types: local, Docker/Docker Compose, and SSH. The choice has a direct impact on autocomplete quality, Xdebug reliability, and the overhead of starting run configurations. This article explains the differences and shows when which setup truly wins.

Alpine.js makes Hyvä frontends fast and reactive, but that same reactivity becomes a trap for E2E tests when it is secured with fixed wait times instead of genuine state assertions. This article shows how Cypress and Playwright reliably test Alpine driven mini cart and wishlist interactions without relying on brittle selectors or fixed timeouts, and how Hyvä's client side behavior differs from classic, server rendered Magento.