Fetch: add test for realm of result of Response's arrayBuffer()

For whatwg/fetch#1751.
web-platform-tests · May 7, 2024 · ef64e9e · ef64e9e
1 parent 1e6ef7e
commit ef64e9e
Showing 1 changed file with 23 additions and 0 deletions.
diff --git a/fetch/api/response/response-arraybuffer-realm.window.js b/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()');