tool: convert App.test.tsx

Author: Simon1375

benchexec/tablegenerator/react-table/src/App.test.tsx

@@ -10,13 +10,27 @@ import ReactDOM from "react-dom";
 import { act } from "react-dom/test-utils";
 import App from "./App";
 
+type StatsReadyResolver = (value: unknown) => void;
+
 it("renders without crashing", async () => {
   const div = document.createElement("div");
-  let statsResolver;
-  const StatsReadyPromise = new Promise((resolve) => (statsResolver = resolve));
+
+  // NOTE (JS->TS): The resolver is assigned inside the Promise constructor, so we
+  // model it as optional and assert it is set before use.
+  let statsResolver: StatsReadyResolver | undefined;
+
+  // NOTE (JS->TS): Keep promise type explicit and avoid `any`.
+  const statsReadyPromise: Promise<unknown> = new Promise((resolve) => {
+    statsResolver = resolve;
+  });
+
   await act(async () => {
-    ReactDOM.render(<App onStatsReady={statsResolver} />, div);
-    await StatsReadyPromise;
+    ReactDOM.render(
+      <App onStatsReady={statsResolver as StatsReadyResolver} />,
+      div,
+    );
+    await statsReadyPromise;
   });
+
   ReactDOM.unmountComponentAtNode(div);
 });