noob-visual

Visual regression testing automates screenshot capture and pixel-diff verification against a stored baseline to detect UI changes. This tool executes pre-claimed test cases using BDD steps to validate deterministic screenshots across devices and viewports.

Snapshot-based element discovery locates UI elements without hardcoding selectors by using captured snapshots for identification. This approach supports the visual claim workflow by dynamically finding elements during test execution.

To capture a baseline screenshot, run the visual test in baseline mode which stores the initial screenshots for future comparisons. You must first generate a claim using the noob-visual-claim tool to initialize the run.

Yes, visual tests can run across different devices and viewports for deterministic screenshot validation. The tool coordinates test runs using telemetry hooks and visual_steps config to ensure consistent capture conditions.

Yes, noob-visual-claim is required to create or resume a visual run. You must pass the resulting CLAIM and VISUAL_RUN_ID parameters to initialize the visual test execution and coordinate telemetry hooks.

Visual diff verification fails when captured screenshots mismatch the stored baseline. Ensure deterministic capture conditions across devices and viewports, and verify that the baseline was captured under the same visual_steps configuration.