re-add declaration

apollographql · Nov 30, 2023 · 1bbd815 · 1bbd815
1 parent 59fe42c
commit 1bbd815
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/src/testing/matchers/toBeGarbageCollected.ts b/src/testing/matchers/toBeGarbageCollected.ts
@@ -1,5 +1,12 @@
 import type { MatcherFunction } from "expect";
 
+// this is necessary because this file is picked up by `tsc` (it's not a test),
+// but our main `tsconfig.json` doesn't include `"ES2021.WeakRef"` on purpose
+declare class WeakRef<T extends WeakKey> {
+  constructor(target: T);
+  deref(): T | undefined;
+}
+
 export const toBeGarbageCollected: MatcherFunction<[weakRef: WeakRef<any>]> =
   async function (actual) {
     const hint = this.utils.matcherHint("toBeGarbageCollected");