1 files changed, 75 insertions, 0 deletions
diff --git a/docshell/test/mochitest/file_bug1742865.sjs b/docshell/test/mochitest/file_bug1742865.sjs
new file mode 100644
index 0000000000..d97526f281
--- /dev/null
+++ b/docshell/test/mochitest/file_bug1742865.sjs
@@ -0,0 +1,75 @@
+function handleRequest(request, response) {
+  if (request.queryString == "reset") {
+    setState("index", "0");
+    response.setStatusLine(request.httpVersion, 200, "Ok");
+    response.write("Reset");
+    return;
+  }
+
+  let refresh = "";
+  let index = Number(getState("index"));
+  // index == 0 First load, returns first meta refresh
+  // index == 1 Second load, caused by first meta refresh, returns second meta refresh
+  // index == 2 Third load, caused by second meta refresh, doesn't return a meta refresh
+  let query = new URLSearchParams(request.queryString);
+  if (index < 2) {
+    refresh = query.get("seconds");
+    if (query.get("crossOrigin") == "true") {
+      const hosts = ["example.org", "example.com"];
+
+      let url = `${request.scheme}://${hosts[index]}${request.path}?${request.queryString}`;
+      refresh += `; url=${url}`;
+    }
+    refresh = `<meta http-equiv="Refresh" content="${refresh}">`;
+  }
+  // We want to scroll for the first load, and check that the meta refreshes keep the same
+  // scroll position.
+  let scroll = index == 0 ? `scrollTo(0, ${query.get("scrollTo")});` : "";
+
+  setState("index", String(index + 1));
+
+  response.write(
+    `<!DOCTYPE html>
+<html>
+<head>
+  <meta charset="utf-8">
+  <meta http-equiv="Cache-Control" content="no-cache">
+  ${refresh}
+  <script>
+    window.addEventListener("pageshow", () => {
+      ${scroll}
+      window.top.opener.postMessage({
+        commandType: "pageShow",
+        commandData: {
+          inputValue: document.getElementById("input").value,
+          scrollPosition: window.scrollY,
+        },
+      }, "*");
+    });
+    window.addEventListener("message", ({ data }) => {
+      if (data == "changeInputValue") {
+        document.getElementById("input").value = "1234";
+        window.top.opener.postMessage({
+          commandType: "onChangedInputValue",
+          commandData: {
+            historyLength: history.length,
+            inputValue: document.getElementById("input").value,
+          },
+        }, "*");
+      } else if (data == "loadNext") {
+        location.href += "&loadnext=1";
+      } else if (data == "back") {
+        history.back();
+      }
+    });
+  </script>
+</head>
+<body>
+<input type="text" id="input" value="initial"></input>
+<div style='height: 9000px;'></div>
+<p>
+</p>
+</body>
+</html>`
+  );
+}