import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

browser/base/content/test/newtab/browser_newtab_bug991111.js

@@ -0,0 +1,35 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+add_task(function* () {
+  // set max rows to 1, to avoid scroll events by clicking middle button
+  yield pushPrefs(["browser.newtabpage.rows", 1]);
+  yield setLinks("-1");
+  yield* addNewTabPageTab();
+  // we need a second newtab to honor max rows
+  yield* addNewTabPageTab();
+
+  yield ContentTask.spawn(gBrowser.selectedBrowser, {index: 0}, function* (args) {
+    let {site} = content.wrappedJSObject.gGrid.cells[args.index];
+
+    let origOnClick = site.onClick;
+    site.onClick = e => {
+      origOnClick.call(site, e);
+      sendAsyncMessage("test:clicked-on-cell", {});
+    };
+  });
+
+  let mm = gBrowser.selectedBrowser.messageManager;
+  let messagePromise = new Promise(resolve => {
+    mm.addMessageListener("test:clicked-on-cell", function onResponse(message) {
+      mm.removeMessageListener("test:clicked-on-cell", onResponse);
+      resolve();
+    });
+  });
+
+  // Send a middle-click and make sure it happened
+  yield BrowserTestUtils.synthesizeMouseAtCenter(".newtab-cell",
+                                                 {button: 1}, gBrowser.selectedBrowser);
+  yield messagePromise;
+  ok(true, "middle click triggered click listener");
+});