fix: expose "Deno.memoryUsage()" in worker context (#13293)

1 files changed, 29 insertions, 0 deletions

diff --git a/cli/tests/testdata/workers/test.ts b/cli/tests/testdata/workers/test.ts
index 1c345f80b..43df417fb 100644
--- a/cli/tests/testdata/workers/test.ts
+++ b/cli/tests/testdata/workers/test.ts
@@ -798,3 +798,32 @@ Deno.test({
     worker.terminate();
   },
 });
+
+Deno.test({
+  name: "worker Deno.memoryUsage",
+  fn: async function () {
+    const w = new Worker(
+      /**
+       * Source code
+       * self.onmessage = function() {self.postMessage(Deno.memoryUsage())}
+       */
+      "data:application/typescript;base64,c2VsZi5vbm1lc3NhZ2UgPSBmdW5jdGlvbigpIHtzZWxmLnBvc3RNZXNzYWdlKERlbm8ubWVtb3J5VXNhZ2UoKSl9",
+      { type: "module", name: "tsWorker", deno: true },
+    );
+
+    w.postMessage(null);
+
+    const memoryUsagePromise = deferred();
+    w.onmessage = function (evt) {
+      memoryUsagePromise.resolve(evt.data);
+    };
+
+    assertEquals(
+      Object.keys(
+        await memoryUsagePromise as unknown as Record<string, number>,
+      ),
+      ["rss", "heapTotal", "heapUsed", "external"],
+    );
+    w.terminate();
+  },
+});