Checkpoint web parity through Chromium input tasks

web/tests/e2e/library-override-chromium.spec.ts

@@ -0,0 +1,35 @@
+import { expect, test } from "@playwright/test";
+
+test("M12-03N runs the verified override writer in an independent Chromium lane", async ({ page }) => {
+  await page.goto("/");
+  const result = await page.evaluate(async () => {
+    const writer = await import("/src/library-override-chromium.ts");
+    const state = {
+      schemaVersion: 1,
+      revision: 3,
+      localDataBlockId: "Object/M12 Override Object",
+      referenceSourceDataBlockId: "Object/M12 Override Object",
+      hierarchyRootDataBlockId: "Object/M12 Override Object",
+      owner: "LOCAL_OVERRIDE",
+      readOnly: false,
+      referenceReadOnly: true,
+      propertyPath: '["m12_override_value"]',
+      value: 2.5,
+    };
+    const result = writer.applyOverrideWriter(state, {
+      schemaVersion: 1,
+      operation: "SET_M12_OVERRIDE_VALUE",
+      baseRevision: 3,
+      localDataBlockId: "Object/M12 Override Object",
+      referenceSourceDataBlockId: "Object/M12 Override Object",
+      hierarchyRootDataBlockId: "Object/M12 Override Object",
+      owner: "LOCAL_OVERRIDE",
+      readOnly: false,
+      referenceReadOnly: true,
+      propertyPath: '["m12_override_value"]',
+      value: 4.5,
+    });
+    return { status: result.status, code: result.code, revision: result.state.revision, value: result.state.value };
+  });
+  expect(result).toEqual({ status: "APPLIED", code: null, revision: 4, value: 4.5 });
+});