fix(std/testing/bench): Make progress callback async (#6175)

1 files changed, 21 insertions, 0 deletions

diff --git a/std/testing/bench_test.ts b/std/testing/bench_test.ts
index a56d4fd55..0b101c22f 100644
--- a/std/testing/bench_test.ts
+++ b/std/testing/bench_test.ts
@@ -338,6 +338,27 @@ test({
   },
 });
 
+test({
+  name: "async progressCallback",
+  fn: async function (): Promise<void> {
+    clearBenchmarks();
+    dummyBench("single");
+
+    const asyncCallbacks = [];
+
+    await runBenchmarks({ silent: true }, (progress) => {
+      return new Promise((resolve) => {
+        queueMicrotask(() => {
+          asyncCallbacks.push(progress);
+          resolve();
+        });
+      });
+    });
+
+    assertEquals(asyncCallbacks.length, 5);
+  },
+});
+
 function dummyBench(name: string, runs = 1): void {
   bench({
     name,