https://github.com/whatwg/html/issues/3885

Author: TimothyGu

html/webappapis/dynamic-markup-insertion/opening-the-input-stream/reload.window.js

@@ -1,16 +1,23 @@
-async_test(t => {
-  const frame = document.body.appendChild(document.createElement("iframe"));
-  frame.src = "/common/blank.html";
-  frame.addEventListener("load", t.step_func(() => {
-    t.step_timeout(() => {
-      assert_equals(frame.contentDocument.body.childNodes.length, 0, "precondition");
-      frame.contentDocument.open();
-      frame.contentDocument.write("<p>Content</p>");
-      frame.contentDocument.close();
-      frame.contentWindow.location.reload();
-      frame.addEventListener("load", t.step_func_done(() => {
-        assert_equals(frame.contentDocument.body.childNodes.length, 0, "actual test");
-      }));
-    }, 100);
-  }), { once: true });
-}, "Reloading a document.open()'d page should give original results");
+const sharedSymbol = Symbol.for('Test status');
+
+if (this === top) {
+  async_test(t => {
+    const frame = document.body.appendChild(document.createElement("iframe"));
+    t.add_cleanup(() => frame.remove());
+    frame.src = "/common/blank.html";
+    frame.addEventListener("load", t.step_func(() => {
+      t.step_timeout(() => {
+        assert_equals(frame.contentDocument.body.childNodes.length, 0, "precondition");
+        frame.contentDocument.open();
+        frame.contentDocument.write("<p>Content</p>");
+        frame.contentDocument.close();
+        frame.addEventListener("load", t.step_func_done(() => {
+          assert_equals(frame.contentWindow[sharedSymbol], "Done!", "actual test");
+        }));
+        frame.contentWindow.location.reload();
+      }, 100);
+    }), { once: true });
+  }, "Reloading a document.open()'d page should reload the URL of the entry realm's responsible document");
+} else {
+  window[sharedSymbol] = "Done!";
+}