diff -r 000000000000 -r 6474c204b198 browser/devtools/netmonitor/test/browser_net_resend.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/netmonitor/test/browser_net_resend.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,173 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+let gPanelWin;
+let gPanelDoc;
+
+const ADD_QUERY = "t1=t2";
+const ADD_HEADER = "Test-header: true";
+const ADD_POSTDATA = "t3=t4";
+
+/**
+ * Tests if resending a request works.
+ */
+
+function test() {
+  initNetMonitor(POST_DATA_URL).then(([aTab, aDebuggee, aMonitor]) => {
+    info("Starting test... ");
+
+    gPanelWin = aMonitor.panelWin;
+    gPanelDoc = gPanelWin.document;
+
+    let { NetMonitorView } = gPanelWin;
+    let { RequestsMenu } = NetMonitorView;
+    let TAB_UPDATED = aMonitor.panelWin.EVENTS.TAB_UPDATED;
+    let CUSTOMREQUESTVIEW_POPULATED = aMonitor.panelWin.EVENTS.CUSTOMREQUESTVIEW_POPULATED;
+
+    RequestsMenu.lazyUpdate = false;
+
+    waitForNetworkEvents(aMonitor, 0, 2).then(() => {
+      let origItem = RequestsMenu.getItemAtIndex(0);
+      RequestsMenu.selectedItem = origItem;
+
+      waitFor(aMonitor.panelWin, TAB_UPDATED).then(() => {
+        // add a new custom request cloned from selected request
+        RequestsMenu.cloneSelectedRequest();
+        return waitFor(aMonitor.panelWin, CUSTOMREQUESTVIEW_POPULATED);
+      }).then(() => {
+        testCustomForm(origItem.attachment);
+
+        let customItem = RequestsMenu.selectedItem;
+        testCustomItem(customItem, origItem);
+
+        // edit the custom request
+        editCustomForm(() => {
+          testCustomItemChanged(customItem, origItem);
+
+          waitForNetworkEvents(aMonitor, 0, 1).then(() => {
+            let sentItem = RequestsMenu.selectedItem;
+            testSentRequest(sentItem.attachment, origItem.attachment);
+            finishUp(aMonitor);
+          });
+          // send the new request
+          RequestsMenu.sendCustomRequest();
+        });
+      });
+    });
+
+    aDebuggee.performRequests();
+  });
+}
+
+function testCustomItem(aItem, aOrigItem) {
+  let method = aItem.target.querySelector(".requests-menu-method").value;
+  let origMethod = aOrigItem.target.querySelector(".requests-menu-method").value;
+  is(method, origMethod, "menu item is showing the same method as original request");
+
+  let file = aItem.target.querySelector(".requests-menu-file").value;
+  let origFile = aOrigItem.target.querySelector(".requests-menu-file").value;
+  is(file, origFile, "menu item is showing the same file name as original request");
+
+  let domain = aItem.target.querySelector(".requests-menu-domain").value;
+  let origDomain = aOrigItem.target.querySelector(".requests-menu-domain").value;
+  is(domain, origDomain, "menu item is showing the same domain as original request");
+}
+
+function testCustomItemChanged(aItem, aOrigItem) {
+  let file = aItem.target.querySelector(".requests-menu-file").value;
+  let expectedFile = aOrigItem.target.querySelector(".requests-menu-file").value + "&" + ADD_QUERY;
+
+  is(file, expectedFile, "menu item is updated to reflect url entered in form");
+}
+
+/*
+ * Test that the New Request form was populated correctly
+ */
+function testCustomForm(aData) {
+  is(gPanelDoc.getElementById("custom-method-value").value, aData.method,
+     "new request form showing correct method");
+
+  is(gPanelDoc.getElementById("custom-url-value").value, aData.url,
+     "new request form showing correct url");
+
+  let query = gPanelDoc.getElementById("custom-query-value");
+  is(query.value, "foo=bar\nbaz=42\ntype=urlencoded",
+     "new request form showing correct query string");
+
+  let headers = gPanelDoc.getElementById("custom-headers-value").value.split("\n");
+  for (let {name, value} of aData.requestHeaders.headers) {
+    ok(headers.indexOf(name + ": " + value) >= 0, "form contains header from request");
+  }
+
+  let postData = gPanelDoc.getElementById("custom-postdata-value");
+  is(postData.value, aData.requestPostData.postData.text,
+     "new request form showing correct post data");
+}
+
+/*
+ * Add some params and headers to the request form
+ */
+function editCustomForm(callback) {
+  gPanelWin.focus();
+
+  let query = gPanelDoc.getElementById("custom-query-value");
+  query.addEventListener("focus", function onFocus() {
+    query.removeEventListener("focus", onFocus, false);
+
+    // add params to url query string field
+    type(["VK_RETURN"]);
+    type(ADD_QUERY);
+
+    let headers = gPanelDoc.getElementById("custom-headers-value");
+    headers.addEventListener("focus", function onFocus() {
+      headers.removeEventListener("focus", onFocus, false);
+
+      // add a header
+      type(["VK_RETURN"]);
+      type(ADD_HEADER);
+
+      let postData = gPanelDoc.getElementById("custom-postdata-value");
+      postData.addEventListener("focus", function onFocus() {
+        postData.removeEventListener("focus", onFocus, false);
+
+        // add to POST data
+        type(ADD_POSTDATA);
+        callback();
+      }, false);
+      postData.focus();
+    }, false);
+    headers.focus();
+  }, false);
+  query.focus();
+}
+
+/*
+ * Make sure newly created event matches expected request
+ */
+function testSentRequest(aData, aOrigData) {
+  is(aData.method, aOrigData.method, "correct method in sent request");
+  is(aData.url, aOrigData.url + "&" + ADD_QUERY, "correct url in sent request");
+
+  let hasHeader = aData.requestHeaders.headers.some((header) => {
+    return (header.name + ": " + header.value) == ADD_HEADER;
+  })
+  ok(hasHeader, "new header added to sent request");
+
+  is(aData.requestPostData.postData.text,
+     aOrigData.requestPostData.postData.text + ADD_POSTDATA,
+     "post data added to sent request");
+}
+
+
+function type(aString) {
+  for (let ch of aString) {
+    EventUtils.synthesizeKey(ch, {}, gPanelWin);
+  }
+}
+
+function finishUp(aMonitor) {
+  gPanelWin = null;
+  gPanelDoc = null;
+
+  teardown(aMonitor).then(finish);
+}