1 files changed, 26 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/webappapis/dynamic-markup-insertion/opening-the-input-stream/bailout-exception-vs-return-xml.window.js b/testing/web-platform/tests/html/webappapis/dynamic-markup-insertion/opening-the-input-stream/bailout-exception-vs-return-xml.window.js
new file mode 100644
index 0000000000..45a67f925b
--- /dev/null
+++ b/testing/web-platform/tests/html/webappapis/dynamic-markup-insertion/opening-the-input-stream/bailout-exception-vs-return-xml.window.js
@@ -0,0 +1,26 @@
+async_test(t => {
+  const iframe = document.body.appendChild(document.createElement("iframe"));
+  t.add_cleanup(() => { iframe.remove(); });
+  self.testSynchronousScript = t.step_func_done(() => {
+    assert_throws_dom("InvalidStateError", iframe.contentWindow.DOMException, () => {
+      iframe.contentDocument.open();
+    }, "opening an XML document should throw");
+  });
+  iframe.src = "resources/bailout-order-xml-with-synchronous-script-frame.xhtml";
+}, "document.open should throw an InvalidStateError with XML document even when there is an active parser executing script");
+
+for (const ev of ["beforeunload", "pagehide", "unload"]) {
+  async_test(t => {
+    const iframe = document.body.appendChild(document.createElement("iframe"));
+    t.add_cleanup(() => { iframe.remove(); });
+    iframe.addEventListener("load", t.step_func(() => {
+      iframe.contentWindow.addEventListener(ev, t.step_func_done(() => {
+        assert_throws_dom("InvalidStateError", iframe.contentWindow.DOMException, () => {
+          iframe.contentDocument.open();
+        }, "opening an XML document should throw");
+      }));
+      iframe.src = "about:blank";
+    }), { once: true });
+    iframe.src = "/common/dummy.xhtml";
+  }, `document.open should throw an InvalidStateError with XML document even when the ignore-opens-during-unload counter is greater than 0 (during ${ev} event)`);
+}