init project

test/regressions/manual/README.md

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+# manual visual regression tests
+
+These are expensive tests that should only be consulted if you suspect that something changed.
+Move the test you want to check inside a temporary folder in `../test` and run the visual regression test suite to get a screenshot.

test/regressions/manual/icons/AllIcons.js

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+import * as React from 'react';
+import * as icons from '@mui/icons-material';
+
+export default function AllIcons() {
+  return (
+    <div style={{ display: 'flex', flexWrap: 'wrap' }}>
+      {Object.entries(icons).map(([name, Component]) => {
+        return <Component key={name} style={{ fontSize: '2.5rem' }} />;
+      })}
+    </div>
+  );
+}