1 files changed, 114 insertions, 0 deletions
diff --git a/dom/events/test/clipboard/browser_navigator_clipboard_touch.js b/dom/events/test/clipboard/browser_navigator_clipboard_touch.js
new file mode 100644
index 0000000000..aeea9a612d
--- /dev/null
+++ b/dom/events/test/clipboard/browser_navigator_clipboard_touch.js
@@ -0,0 +1,114 @@
+/* -*- Mode: JavaScript; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+const kBaseUrlForContent = getRootDirectory(gTestPath).replace(
+  "chrome://mochitests/content",
+  "https://example.com"
+);
+const kContentFileUrl =
+  kBaseUrlForContent + "simple_navigator_clipboard_readText.html";
+
+Services.scriptloader.loadSubScript(
+  "chrome://mochitests/content/browser/gfx/layers/apz/test/mochitest/apz_test_native_event_utils.js",
+  this
+);
+
+// @param aBrowser browser object of the content tab.
+// @param aContentElementId the ID of the element to be tapped.
+function promiseTouchTapContent(aBrowser, aContentElementId) {
+  return SpecialPowers.spawn(
+    aBrowser,
+    [aContentElementId],
+    async _contentElementId => {
+      await content.wrappedJSObject.waitUntilApzStable();
+
+      const contentElement = content.document.getElementById(_contentElementId);
+      let promise = new Promise(resolve => {
+        contentElement.addEventListener(
+          "click",
+          function (e) {
+            resolve({ x: e.screenX, y: e.screenY });
+          },
+          { once: true }
+        );
+      });
+
+      EventUtils.synthesizeTouchAtCenter(contentElement, {}, content.window);
+
+      return promise;
+    }
+  );
+}
+
+add_setup(async function () {
+  await SpecialPowers.pushPrefEnv({
+    set: [
+      ["dom.events.asyncClipboard.readText", true],
+      ["test.events.async.enabled", true],
+    ],
+  });
+});
+
+add_task(async function test_paste_button_position_touch() {
+  // Ensure there's text on the clipboard.
+  await promiseWritingRandomTextToClipboard();
+
+  await BrowserTestUtils.withNewTab(kContentFileUrl, async function (browser) {
+    const pasteButtonIsShown = promisePasteButtonIsShown();
+    const coordsOfClickInContentRelativeToScreenInDevicePixels =
+      await promiseTouchTapContent(browser, "invokeReadTextOnceId");
+    info(
+      "coordsOfClickInContentRelativeToScreenInDevicePixels: " +
+        coordsOfClickInContentRelativeToScreenInDevicePixels.x +
+        ", " +
+        coordsOfClickInContentRelativeToScreenInDevicePixels.y
+    );
+
+    const pasteButtonCoordsRelativeToScreenInDevicePixels =
+      await pasteButtonIsShown;
+    info(
+      "pasteButtonCoordsRelativeToScreenInDevicePixels: " +
+        pasteButtonCoordsRelativeToScreenInDevicePixels.x +
+        ", " +
+        pasteButtonCoordsRelativeToScreenInDevicePixels.y
+    );
+
+    const mouseCoordsRelativeToScreenInDevicePixels =
+      getMouseCoordsRelativeToScreenInDevicePixels();
+    info(
+      "mouseCoordsRelativeToScreenInDevicePixels: " +
+        mouseCoordsRelativeToScreenInDevicePixels.x +
+        ", " +
+        mouseCoordsRelativeToScreenInDevicePixels.y
+    );
+
+    // Asserting not overlapping is important; otherwise, when the
+    // "Paste" button is shown via a `mousedown` event, the following
+    // `mouseup` event could accept the "Paste" button unnoticed by the
+    // user.
+    ok(
+      isCloselyLeftOnTopOf(
+        mouseCoordsRelativeToScreenInDevicePixels,
+        pasteButtonCoordsRelativeToScreenInDevicePixels
+      ),
+      "'Paste' button is closely left on top of the mouse pointer."
+    );
+    ok(
+      isCloselyLeftOnTopOf(
+        coordsOfClickInContentRelativeToScreenInDevicePixels,
+        pasteButtonCoordsRelativeToScreenInDevicePixels
+      ),
+      "Coords of click in content are closely left on top of the 'Paste' button."
+    );
+
+    // To avoid disturbing subsequent tests.
+    const pasteButtonIsHidden = promisePasteButtonIsHidden();
+    await promiseClickPasteButton();
+    await pasteButtonIsHidden;
+  });
+});