1 files changed, 60 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/webappapis/dynamic-markup-insertion/opening-the-input-stream/ignore-opens-during-unload.window.js b/testing/web-platform/tests/html/webappapis/dynamic-markup-insertion/opening-the-input-stream/ignore-opens-during-unload.window.js
new file mode 100644
index 0000000000..43506a22a4
--- /dev/null
+++ b/testing/web-platform/tests/html/webappapis/dynamic-markup-insertion/opening-the-input-stream/ignore-opens-during-unload.window.js
@@ -0,0 +1,60 @@
+for (const [ev, target] of [
+  ["beforeunload", iframe => iframe.contentWindow],
+  ["pagehide", iframe => iframe.contentWindow],
+  ["unload", iframe => iframe.contentWindow],
+  ["visibilitychange", iframe => iframe.contentDocument],
+]) {
+  async_test(t => {
+    const iframe = document.body.appendChild(document.createElement("iframe"));
+    t.add_cleanup(() => iframe.remove());
+    iframe.src = "/common/blank.html";
+    iframe.onload = t.step_func(() => {
+      target(iframe).addEventListener(ev, t.step_func_done(() => {
+        assert_not_equals(iframe.contentDocument.childNodes.length, 0);
+        assert_equals(iframe.contentDocument.open(), iframe.contentDocument);
+        assert_not_equals(iframe.contentDocument.childNodes.length, 0);
+      }));
+      iframe.src = "about:blank";
+    });
+  }, `document.open should bail out when ignore-opens-during-unload is greater than 0 during ${ev} event (in top-level browsing context)`);
+
+  async_test(t => {
+    const iframe = document.body.appendChild(document.createElement("iframe"));
+    t.add_cleanup(() => iframe.remove());
+    iframe.src = "/common/blank.html?1";
+    iframe.onload = t.step_func(() => {
+      const doc = iframe.contentDocument;
+      const innerIframe = doc.body.appendChild(doc.createElement("iframe"));
+      innerIframe.src = "/common/blank.html?2";
+      innerIframe.onload = t.step_func(() => {
+        // Navigate the parent, listen on the child, and open() the parent.
+        target(innerIframe).addEventListener(ev, t.step_func_done(() => {
+          assert_not_equals(iframe.contentDocument.childNodes.length, 0);
+          iframe.contentDocument.open();
+          assert_not_equals(iframe.contentDocument.childNodes.length, 0);
+        }));
+        iframe.src = "about:blank";
+      });
+    });
+  }, `document.open should bail out when ignore-opens-during-unload is greater than 0 during ${ev} event (open(parent) while unloading parent and child)`);
+
+  async_test(t => {
+    const iframe = document.body.appendChild(document.createElement("iframe"));
+    t.add_cleanup(() => iframe.remove());
+    iframe.src = "/common/blank.html?1";
+    iframe.onload = t.step_func(() => {
+      const doc = iframe.contentDocument;
+      const innerIframe = doc.body.appendChild(doc.createElement("iframe"));
+      innerIframe.src = "/common/blank.html?2";
+      innerIframe.onload = t.step_func(() => {
+        // Navigate the child, listen on the child, and open() the parent.
+        target(innerIframe).addEventListener(ev, t.step_func_done(() => {
+          assert_not_equals(iframe.contentDocument.childNodes.length, 0);
+          iframe.contentDocument.open();
+          assert_equals(iframe.contentDocument.childNodes.length, 0);
+        }));
+        innerIframe.src = "about:blank";
+      });
+    });
+  }, `document.open should bail out when ignore-opens-during-unload is greater than 0 during ${ev} event (open(parent) while unloading child only)`);
+}