1 files changed, 42 insertions, 0 deletions
diff --git a/browser/base/content/test/general/browser_backButtonFitts.js b/browser/base/content/test/general/browser_backButtonFitts.js
new file mode 100644
index 000000000..0e8aeeaee
--- /dev/null
+++ b/browser/base/content/test/general/browser_backButtonFitts.js
@@ -0,0 +1,42 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+add_task(function* () {
+  let firstLocation = "http://example.org/browser/browser/base/content/test/general/dummy_page.html";
+  yield BrowserTestUtils.openNewForegroundTab(gBrowser, firstLocation);
+
+  yield ContentTask.spawn(gBrowser.selectedBrowser, {}, function* () {
+    // Push the state before maximizing the window and clicking below.
+    content.history.pushState("page2", "page2", "page2");
+
+    // While in the child process, add a listener for the popstate event here. This
+    // event will fire when the mouse click happens.
+    content.addEventListener("popstate", function onPopState() {
+      content.removeEventListener("popstate", onPopState, false);
+      sendAsyncMessage("Test:PopStateOccurred", { location: content.document.location.href });
+    }, false);
+  });
+
+  window.maximize();
+
+  // Find where the nav-bar is vertically.
+  var navBar = document.getElementById("nav-bar");
+  var boundingRect = navBar.getBoundingClientRect();
+  var yPixel = boundingRect.top + Math.floor(boundingRect.height / 2);
+  var xPixel = 0; // Use the first pixel of the screen since it is maximized.
+
+  let resultLocation = yield new Promise(resolve => {
+    messageManager.addMessageListener("Test:PopStateOccurred", function statePopped(message) {
+      messageManager.removeMessageListener("Test:PopStateOccurred", statePopped);
+      resolve(message.data.location);
+    });
+
+    EventUtils.synthesizeMouseAtPoint(xPixel, yPixel, {}, window);
+  });
+
+  is(resultLocation, firstLocation, "Clicking the first pixel should have navigated back.");
+  window.restore();
+
+  gBrowser.removeCurrentTab();
+});