1 files changed, 26 insertions, 0 deletions
diff --git a/js/globals_test.ts b/js/globals_test.ts
index 3085118de..42a055087 100644
--- a/js/globals_test.ts
+++ b/js/globals_test.ts
@@ -77,3 +77,29 @@ test(function DenoNamespaceImmutable(): void {
   // @ts-ignore
   assert(print === Deno.core.print);
 });
+
+test(async function windowQueueMicrotask(): Promise<void> {
+  let resolve1: () => void | undefined;
+  let resolve2: () => void | undefined;
+  let microtaskDone = false;
+  const p1 = new Promise(
+    (res): void => {
+      resolve1 = (): void => {
+        microtaskDone = true;
+        res();
+      };
+    }
+  );
+  const p2 = new Promise(
+    (res): void => {
+      resolve2 = (): void => {
+        assert(microtaskDone);
+        res();
+      };
+    }
+  );
+  window.queueMicrotask(resolve1!);
+  setTimeout(resolve2!, 0);
+  await p1;
+  await p2;
+});