Adding Maps page to page_sets for telemetry.

tools/telemetry/telemetry/page/actions/drag_unittest.py

+# Copyright 2015 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+import math
+import os
+
+from telemetry.page.actions import drag
+from telemetry.unittest_util import tab_test_case
+
+
+class DragActionTest(tab_test_case.TabTestCase):
+  def checkWithinRange(self, value, expected, error_ratio):

[Sami, 2015/03/05 12:36:11]

CamelCase naming please.

+    error_range = abs(expected * error_ratio)
+    return abs(value - expected) <= error_range
+
+  def testDragAction(self):
+    self.Navigate('draggable.html')
+
+    with open(os.path.join(os.path.dirname(__file__),
+                           'gesture_common.js')) as f:
+      js = f.read()
+      self._tab.ExecuteJavaScript(js)
+
+    div_width = self._tab.EvaluateJavaScript(
+        '__GestureCommon_GetBoundingVisibleRect(document.body).width')
+    div_height = self._tab.EvaluateJavaScript(
+        '__GestureCommon_GetBoundingVisibleRect(document.body).height')
+
+    i = drag.DragAction(left_start_ratio=0.5, top_start_ratio=0.5,
+            left_end_ratio=0.75, top_end_ratio=0.75)
+    i.WillRunAction(self._tab)
+    self._tab.ExecuteJavaScript('''
+        window.__dragAction.beginMeasuringHook = function() {
+            window.__didBeginMeasuring = true;
+        };
+        window.__dragAction.endMeasuringHook = function() {
+            window.__didEndMeasuring = true;
+        };''')
+    i.RunAction(self._tab)
+
+    self.assertTrue(self._tab.EvaluateJavaScript('window.__didBeginMeasuring'))
+    self.assertTrue(self._tab.EvaluateJavaScript('window.__didEndMeasuring'))
+
+    div_position_x = self._tab.EvaluateJavaScript(
+        'document.getElementById("drag_div").offsetLeft')
+    div_position_y = self._tab.EvaluateJavaScript(
+        'document.getElementById("drag_div").offsetTop')
+
+    # 0.25 is the ratio of displacement to the initial size.
+    expected_x = math.floor(div_width * -0.25)
+    expected_y = math.floor(div_height * -0.25)
+    error_ratio = 0.1
+
+    self.assertTrue(
+        self.checkWithinRange(div_position_x, expected_x, error_ratio),
+        msg="Moved element's left coordinate: %d, expected: %d" %
+        (div_position_x, expected_x))
+    self.assertTrue(
+        self.checkWithinRange(div_position_y, expected_y, error_ratio),
+        msg="Moved element's top coordinate: %d, expected: %d" %
+        (div_position_y, expected_y))