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Smoke-tests the HiGlass anywidget render pipeline in headless Chromium via vitest browser mode and Playwright. SwiftShader args are required since PixiJS needs a WebGL context unavailable in headless by default.
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We don't have a good way of fully e2e testing widget.js, but right now there is not even a simple test that checks if the widget.js module even loads in the browser, leading to a regression in v1.3.4 (#198).
These changes add a smoke test that renders a minimal HiGlass viewer (single
top-axistrack) in headless browser, verifying the module loads andrendercompletes without error.You can run the test locally with
deno task vitest.