1 files changed, 34 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/anonymous-iframe/initial-empty-document.tentative.https.window.js b/testing/web-platform/tests/html/anonymous-iframe/initial-empty-document.tentative.https.window.js
new file mode 100644
index 0000000000..8d8b095588
--- /dev/null
+++ b/testing/web-platform/tests/html/anonymous-iframe/initial-empty-document.tentative.https.window.js
@@ -0,0 +1,34 @@
+// META: script=/common/get-host-info.sub.js
+// META: script=/html/cross-origin-embedder-policy/credentialless/resources/common.js
+
+const {ORIGIN} = get_host_info();
+
+promise_test_parallel(async t => {
+  const parent = document.createElement("iframe");
+  parent.credentialless = true;
+  document.body.appendChild(parent);
+  parent.src = ORIGIN + "/common/blank.html";
+  // Wait for navigation to complete.
+  await new Promise(resolve => parent.onload = resolve);
+  assert_true(parent.credentialless);
+
+  const child = document.createElement("iframe");
+  parent.contentDocument.body.appendChild(child);
+  assert_false(child.credentialless);
+  assert_true(child.contentWindow.credentialless);
+}, "Initial empty document inherits from parent's document.");
+
+promise_test_parallel(async t => {
+  const parent = document.createElement("iframe");
+  document.body.appendChild(parent);
+  parent.src = ORIGIN + "/common/blank.html";
+  // Wait for navigation to complete.
+  await new Promise(resolve => parent.onload = resolve);
+  assert_false(parent.credentialless);
+
+  const child = document.createElement("iframe");
+  child.credentialless = true;
+  parent.contentDocument.body.appendChild(child);
+  assert_true(child.credentialless);
+  assert_true(child.contentWindow.credentialless);
+}, "Initial empty document inherits from its's iframe's credentialless attribute.");