Bug 1895310 [wpt PR 46104] - add test for realm of result of Response arrayBuffer(), a=testonly

bakkot · moz-wptsync-bot · commit 231f758c1f1c · 2024-05-14T07:22:06.000Z
Automatic update from web-platform-tests Fetch: add test for realm of result of Response's arrayBuffer() For whatwg/fetch#1751. -- wpt-commits: ef64e9e98aff5f530368ee2213b01b5fe2acc2ec wpt-pr: 46104
diff --git a/testing/web-platform/tests/fetch/api/response/response-arraybuffer-realm.window.js b/testing/web-platform/tests/fetch/api/response/response-arraybuffer-realm.window.js
@@ -0,0 +1,23 @@
+// META: title=realm of Response arrayBuffer()
+
+'use strict';
+
+promise_test(async () => {
+  await new Promise(resolve => {
+    onload = resolve;
+  });
+
+  let iframe = document.createElement('iframe');
+  document.body.appendChild(iframe);
+  iframe.srcdoc = '<!doctype html>';
+  await new Promise(resolve => {
+    iframe.onload = resolve;
+  });
+
+  let otherRealm = iframe.contentWindow;
+
+  let ab = await window.Response.prototype.arrayBuffer.call(new otherRealm.Response(''));
+
+  assert_true(ab instanceof otherRealm.ArrayBuffer, "ArrayBuffer should be created in receiver's realm");
+  assert_false(ab instanceof ArrayBuffer, "ArrayBuffer should not be created in the arrayBuffer() methods's realm");
+}, 'realm of the ArrayBuffer from Response arrayBuffer()');
