Elemental Testing My Dear Watson - Unit Tests for UI Components
summary
Shows concrete component testing wins: mounts a product card and clicks the favorite button with Nightwatch instead of full end-to-end flows, cutting setup and flakiness. Demonstrates a CSS tweak that passes in jsdom but fails in a real browser as “element not interactable,” arguing jsdom misrepresents layout. Runs the same mounted test on a real mobile device via BrowserStack cloud to prove parity with production browsers and surface issues that node-based DOMs miss.
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