feat: launch local-first Sudoku workbench

src/test/setup.ts

@@ -0,0 +1,42 @@
+import "@testing-library/jest-dom/vitest";
+import { cleanup } from "@testing-library/react";
+import { afterEach, vi } from "vitest";
+
+if (
+  !(
+    HTMLDialogElement.prototype as HTMLDialogElement & {
+      showModal?: () => void;
+    }
+  ).showModal
+) {
+  HTMLDialogElement.prototype.showModal = function showModal() {
+    this.setAttribute("open", "");
+  };
+}
+
+const nativeDialogClose = HTMLDialogElement.prototype.close;
+HTMLDialogElement.prototype.close = function close(returnValue?: string) {
+  if (nativeDialogClose) {
+    try {
+      nativeDialogClose.call(this, returnValue);
+      return;
+    } catch {
+      // jsdom fallback.
+    }
+  }
+  this.removeAttribute("open");
+};
+
+Object.defineProperty(URL, "createObjectURL", {
+  configurable: true,
+  value: vi.fn(() => "blob:sudoku-tools-test"),
+});
+Object.defineProperty(URL, "revokeObjectURL", {
+  configurable: true,
+  value: vi.fn(),
+});
+
+afterEach(() => {
+  cleanup();
+  vi.clearAllMocks();
+});