Bug 1571693 [wpt PR 17802] - HTML: ensure serializing SharedArrayBuff…

…er throws without COOP+COEP, a=testonly

Automatic update from web-platform-tests
HTML: ensure serializing SharedArrayBuffer throws without COOP+COEP

For whatwg/html#4734.
--

wpt-commits: aecedb53e28abad5432227e293dd016cfc46d4b7
wpt-pr: 17802

testing/web-platform/tests/html/infrastructure/safe-passing-of-structured-data/shared-array-buffers/no-coop-coep.https.any.js

@@ -0,0 +1,18 @@
+test(() => {
+  const sab = new SharedArrayBuffer();
+  const channel = new MessageChannel();
+  assert_throws("DataCloneError", () => channel.port1.postMessage(sab));
+}, "SharedArrayBuffer over MessageChannel without COOP+COEP");
+
+test(() => {
+  const sab = new SharedArrayBuffer();
+  const channel = new BroadcastChannel("Is mir egal");
+  assert_throws("DataCloneError", () => channel.postMessage(sab));
+}, "SharedArrayBuffer over BroadcastChannel without COOP+COEP");
+
+if (self.GLOBAL.isWindow()) {
+  test(() => {
+    const sab = new SharedArrayBuffer();
+    assert_throws("DataCloneError", () => self.postMessage(sab));
+  }, "SharedArrayBuffer over postMessage() without COOP+COEP");
+}