1 files changed, 69 insertions, 0 deletions
diff --git a/browser/base/content/test/general/browser_menuButtonFitts.js b/browser/base/content/test/general/browser_menuButtonFitts.js
new file mode 100644
index 0000000000..a8d7a1e8cb
--- /dev/null
+++ b/browser/base/content/test/general/browser_menuButtonFitts.js
@@ -0,0 +1,69 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+"use strict";
+
+function getNavBarEndPosition() {
+  let navBar = document.getElementById("nav-bar");
+  let boundingRect = navBar.getBoundingClientRect();
+
+  // Find where the nav-bar is vertically.
+  let y = boundingRect.top + Math.floor(boundingRect.height / 2);
+  // Use the last pixel of the screen since it is maximized.
+  let x = boundingRect.width - 1;
+  return { x, y };
+}
+
+/**
+ * Clicking the right end of a maximized window should open the hamburger menu.
+ */
+add_task(async function test_clicking_hamburger_edge_fitts() {
+  if (window.windowState != window.STATE_MAXIMIZED) {
+    info(`Waiting for maximize, current state: ${window.windowState}`);
+    let resizeDone = BrowserTestUtils.waitForEvent(
+      window,
+      "resize",
+      false,
+      () => window.outerWidth >= screen.width - 1
+    );
+    let maximizeDone = BrowserTestUtils.waitForEvent(window, "sizemodechange");
+    window.maximize();
+    await maximizeDone;
+    await resizeDone;
+  }
+
+  is(window.windowState, window.STATE_MAXIMIZED, "should be maximized");
+
+  let { x, y } = getNavBarEndPosition();
+  info(`Clicking in ${x}, ${y}`);
+
+  let popupHiddenResolve;
+  let popupHiddenPromise = new Promise(resolve => {
+    popupHiddenResolve = resolve;
+  });
+  async function onPopupHidden() {
+    PanelUI.panel.removeEventListener("popuphidden", onPopupHidden);
+
+    info("Waiting for restore");
+
+    let restoreDone = BrowserTestUtils.waitForEvent(window, "sizemodechange");
+    window.restore();
+    await restoreDone;
+
+    popupHiddenResolve();
+  }
+  function onPopupShown() {
+    PanelUI.panel.removeEventListener("popupshown", onPopupShown);
+    ok(true, "Clicking at the far edge of the window opened the menu popup.");
+    PanelUI.panel.addEventListener("popuphidden", onPopupHidden);
+    PanelUI.hide();
+  }
+  registerCleanupFunction(function() {
+    PanelUI.panel.removeEventListener("popupshown", onPopupShown);
+    PanelUI.panel.removeEventListener("popuphidden", onPopupHidden);
+  });
+  PanelUI.panel.addEventListener("popupshown", onPopupShown);
+  EventUtils.synthesizeMouseAtPoint(x, y, {}, window);
+  await popupHiddenPromise;
+});