Revert of Collect active stylesheets and and apply asynchronously.

third_party/WebKit/Source/core/dom/TreeScopeStyleSheetCollectionTest.cpp

Index: third_party/WebKit/Source/core/dom/TreeScopeStyleSheetCollectionTest.cpp
diff --git a/third_party/WebKit/Source/core/dom/TreeScopeStyleSheetCollectionTest.cpp b/third_party/WebKit/Source/core/dom/TreeScopeStyleSheetCollectionTest.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..4d1ba765ced1cd58f6977a4754c86f102e3bdab1
--- /dev/null
+++ b/third_party/WebKit/Source/core/dom/TreeScopeStyleSheetCollectionTest.cpp
@@ -0,0 +1,152 @@
+// 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.
+
+#include "core/dom/TreeScopeStyleSheetCollection.h"
+
+#include "core/css/CSSStyleSheet.h"
+#include "core/css/StyleSheetContents.h"
+#include "core/css/parser/CSSParserMode.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace blink {
+
+class TreeScopeStyleSheetCollectionTest : public testing::Test {
+ protected:
+  using SheetVector = HeapVector<Member<CSSStyleSheet>>;
+  using ContentsVector = HeapVector<Member<StyleSheetContents>>;
+
+  enum UpdateType {
+    Reconstruct = TreeScopeStyleSheetCollection::Reconstruct,
+    Reset = TreeScopeStyleSheetCollection::Reset,
+    Additive = TreeScopeStyleSheetCollection::Additive
+  };
+
+  static CSSStyleSheet* createSheet() {
+    return CSSStyleSheet::create(StyleSheetContents::create(
+        CSSParserContext(HTMLStandardMode, nullptr)));
+  }
+
+  static void compareStyleSheets(const SheetVector& oldStyleSheets,
+                                 const SheetVector& newStyleSheets,
+                                 const ContentsVector& expAddedSheets,
+                                 UpdateType testUpdateType) {
+    ContentsVector addedSheets;
+    UpdateType updateType = static_cast<UpdateType>(
+        TreeScopeStyleSheetCollection::compareStyleSheets(
+            oldStyleSheets, newStyleSheets, addedSheets));
+    EXPECT_EQ(testUpdateType, updateType);
+    EXPECT_EQ(expAddedSheets.size(), addedSheets.size());
+    if (expAddedSheets.size() == addedSheets.size()) {
+      for (unsigned i = 0; i < addedSheets.size(); i++)
+        EXPECT_EQ(expAddedSheets.at(i), addedSheets.at(i));
+    }
+  }
+};
+
+TEST_F(TreeScopeStyleSheetCollectionTest, CompareStyleSheetsAppend) {
+  CSSStyleSheet* sheet1 = createSheet();
+  CSSStyleSheet* sheet2 = createSheet();
+
+  ContentsVector added;
+  SheetVector previous;
+  SheetVector current;
+
+  previous.append(sheet1);
+
+  current.append(sheet1);
+  current.append(sheet2);
+
+  added.append(sheet2->contents());
+
+  compareStyleSheets(previous, current, added, Additive);
+}
+
+TEST_F(TreeScopeStyleSheetCollectionTest, CompareStyleSheetsPrepend) {
+  CSSStyleSheet* sheet1 = createSheet();
+  CSSStyleSheet* sheet2 = createSheet();
+
+  ContentsVector added;
+  SheetVector previous;
+  SheetVector current;
+
+  previous.append(sheet2);
+
+  current.append(sheet1);
+  current.append(sheet2);
+
+  added.append(sheet1->contents());
+
+  compareStyleSheets(previous, current, added, Reconstruct);
+}
+
+TEST_F(TreeScopeStyleSheetCollectionTest, CompareStyleSheetsInsert) {
+  CSSStyleSheet* sheet1 = createSheet();
+  CSSStyleSheet* sheet2 = createSheet();
+  CSSStyleSheet* sheet3 = createSheet();
+
+  ContentsVector added;
+  SheetVector previous;
+  SheetVector current;
+
+  previous.append(sheet1);
+  previous.append(sheet3);
+
+  current.append(sheet1);
+  current.append(sheet2);
+  current.append(sheet3);
+
+  added.append(sheet2->contents());
+
+  compareStyleSheets(previous, current, added, Reconstruct);
+}
+
+TEST_F(TreeScopeStyleSheetCollectionTest, CompareStyleSheetsRemove) {
+  CSSStyleSheet* sheet1 = createSheet();
+  CSSStyleSheet* sheet2 = createSheet();
+  CSSStyleSheet* sheet3 = createSheet();
+
+  ContentsVector added;
+  SheetVector previous;
+  SheetVector current;
+
+  previous.append(sheet1);
+  previous.append(sheet2);
+  previous.append(sheet3);
+
+  current.append(sheet1);
+  current.append(sheet3);
+
+  added.append(sheet2->contents());
+
+  // This is really the same as Insert.
+  // TreeScopeStyleSheetCollection::compareStyleSheets will assert if you pass
+  // an array that is longer as the first parameter.
+  compareStyleSheets(current, previous, added, Reconstruct);
+}
+
+TEST_F(TreeScopeStyleSheetCollectionTest, CompareStyleSheetsInsertRemove) {
+  CSSStyleSheet* sheet1 = createSheet();
+  CSSStyleSheet* sheet2 = createSheet();
+  CSSStyleSheet* sheet3 = createSheet();
+
+  ContentsVector added;
+  SheetVector previous;
+  SheetVector current;
+
+  previous.append(sheet1);
+  previous.append(sheet2);
+
+  current.append(sheet2);
+  current.append(sheet3);
+
+  // TODO(rune@opera.com): This is clearly wrong. We add sheet3 and remove
+  // sheet1 and compareStyleSheets returns sheet2 and sheet3 as added
+  // (crbug/475858).
+  added.append(sheet2->contents());
+  added.append(sheet3->contents());
+
+  compareStyleSheets(previous, current, added, Reconstruct);
+}
+
+}  // namespace blink