src/third_party/WebKit/Source/core/css/DragUpdateTest.cpp

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "config.h"
   6 #include "core/dom/Element.h"
   7 #include "core/dom/StyleEngine.h"
   8 #include "core/frame/FrameView.h"
   9 #include "core/html/HTMLDocument.h"
  10 #include "core/html/HTMLElement.h"
  11 #include "core/testing/DummyPageHolder.h"
  12 #include <gtest/gtest.h>
  13
  14 using namespace blink;
  15
  16 namespace {
  17
  18 TEST(DragUpdateTest, AffectedByDragUpdate)
  19 {
  20     // Check that when dragging the div in the document below, you only get a
  21     // single element style recalc.
  22
  23     OwnPtr<DummyPageHolder> dummyPageHolder = DummyPageHolder::create(IntSize(800, 600));
  24     HTMLDocument& document = toHTMLDocument(dummyPageHolder->document());
  25     document.documentElement()->setInnerHTML("<style>div {width:100px;height:100px} div:-webkit-drag { background-color: green }</style>"
  26         "<div>"
  27         "<span></span>"
  28         "<span></span>"
  29         "<span></span>"
  30         "<span></span>"
  31         "</div>", ASSERT_NO_EXCEPTION);
  32
  33     document.view()->updateLayoutAndStyleIfNeededRecursive();
  34     unsigned startCount = document.styleEngine()->resolverAccessCount();
  35
  36     document.documentElement()->renderer()->updateDragState(true);
  37     document.view()->updateLayoutAndStyleIfNeededRecursive();
  38
  39     unsigned accessCount = document.styleEngine()->resolverAccessCount() - startCount;
  40
  41     ASSERT_EQ(1U, accessCount);
  42 }
  43
  44 TEST(DragUpdateTest, ChildrenOrSiblingsAffectedByDragUpdate)
  45 {
  46     // Check that when dragging the div in the document below, you get a
  47     // full subtree style recalc.
  48
  49     OwnPtr<DummyPageHolder> dummyPageHolder = DummyPageHolder::create(IntSize(800, 600));
  50     HTMLDocument& document = toHTMLDocument(dummyPageHolder->document());
  51     document.documentElement()->setInnerHTML("<style>div {width:100px;height:100px} div:-webkit-drag span { background-color: green }</style>"
  52         "<div>"
  53         "<span></span>"
  54         "<span></span>"
  55         "<span></span>"
  56         "<span></span>"
  57         "</div>", ASSERT_NO_EXCEPTION);
  58
  59     document.updateLayout();
  60     unsigned startCount = document.styleEngine()->resolverAccessCount();
  61
  62     document.documentElement()->renderer()->updateDragState(true);
  63     document.updateLayout();
  64
  65     unsigned accessCount = document.styleEngine()->resolverAccessCount() - startCount;
  66
  67     ASSERT_EQ(5U, accessCount);
  68 }
  69
  70 } // namespace