From bdfad23dd012d0c3226b466544e86109da18d09c Mon Sep 17 00:00:00 2001
From: Luca Casonato <hello@lcas.dev>
Date: Tue, 6 Jul 2021 19:42:52 +0200
Subject: feat: support SharedArrayBuffer sharing between workers (#11040)

This commit adds support for sharing SABs between workers.
---
 cli/tests/workers/test.ts | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

(limited to 'cli/tests/workers/test.ts')

diff --git a/cli/tests/workers/test.ts b/cli/tests/workers/test.ts
index b37b7aeb1..d35dbec82 100644
--- a/cli/tests/workers/test.ts
+++ b/cli/tests/workers/test.ts
@@ -789,6 +789,34 @@ Deno.test({
   },
 });
 
+Deno.test({
+  name: "worker SharedArrayBuffer",
+  fn: async function (): Promise<void> {
+    const promise = deferred();
+    const workerOptions: WorkerOptions = { type: "module" };
+    const w = new Worker(
+      new URL("shared_array_buffer.ts", import.meta.url).href,
+      workerOptions,
+    );
+    const sab1 = new SharedArrayBuffer(1);
+    const sab2 = new SharedArrayBuffer(1);
+    const bytes1 = new Uint8Array(sab1);
+    const bytes2 = new Uint8Array(sab2);
+    assertEquals(bytes1[0], 0);
+    assertEquals(bytes2[0], 0);
+    w.onmessage = (): void => {
+      w.postMessage([sab1, sab2]);
+      w.onmessage = (): void => {
+        assertEquals(bytes1[0], 1);
+        assertEquals(bytes2[0], 2);
+        promise.resolve();
+      };
+    };
+    await promise;
+    w.terminate();
+  },
+});
+
 Deno.test({
   name: "Send MessagePorts from / to workers",
   fn: async function (): Promise<void> {
-- 
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