Bug fix: toPositionInComposedTree should treat positions with shadow roots

Source/core/dom/PositionTest.cpp

 // 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 "config.h"
 #include "core/dom/Position.h"
 
 #include "core/editing/EditingTestBase.h"
 
 namespace blink {
@@ skipping 81 matching lines @@
 TEST_F(PositionTest, ToPositionInComposedTreeWithInactiveInsertionPoint)
 {
     const char* bodyContent = "<p id='p'><content></content></p>";
     setBodyContent(bodyContent);
     RefPtrWillBeRawPtr<Element> anchor = document().getElementById("p");
 
     EXPECT_EQ(positionInComposedTree(*anchor, 0), toPositionInComposedTree(positionInDOMTree(*anchor, 0)));
     EXPECT_EQ(PositionInComposedTree(anchor, PositionInComposedTree::PositionIsAfterChildren), toPositionInComposedTree(positionInDOMTree(*anchor, 1)));
 }
 
+TEST_F(PositionTest, ToPositionInComposedTreeWithShadowRoot)
+{
+    const char* bodyContent = "<p id='host'>00<b id='one'>11</b>22</p>";
+    const char* shadowContent = "<a><content select=#one></content></a>";
+    setBodyContent(bodyContent);
+    RefPtrWillBeRawPtr<ShadowRoot> shadowRoot = setShadowContent(shadowContent);
+    RefPtrWillBeRawPtr<Element> host = document().getElementById("host");
+
+    EXPECT_EQ(positionInComposedTree(*host, 0), toPositionInComposedTree(positionInDOMTree(*shadowRoot, 0)));
+    EXPECT_EQ(PositionInComposedTree(host, PositionInComposedTree::PositionIsAfterChildren), toPositionInComposedTree(positionInDOMTree(*shadowRoot, 1)));
+}
+
+TEST_F(PositionTest, ToPositionInComposedTreeWithShadowRootContainingSingleContent)
+{
+    const char* bodyContent = "<p id='host'>00<b id='one'>11</b>22</p>";
+    const char* shadowContent = "<content select=#one></content>";
+    setBodyContent(bodyContent);
+    RefPtrWillBeRawPtr<ShadowRoot> shadowRoot = setShadowContent(shadowContent);
+    RefPtrWillBeRawPtr<Element> host = document().getElementById("host");
+
+    EXPECT_EQ(positionInComposedTree(*host, 0), toPositionInComposedTree(positionInDOMTree(*shadowRoot, 0)));
+    EXPECT_EQ(PositionInComposedTree(host, PositionInComposedTree::PositionIsAfterChildren), toPositionInComposedTree(positionInDOMTree(*shadowRoot, 1)));
+}
+
+TEST_F(PositionTest, ToPositionInComposedTreeWithEmptyShadowRoot)
+{
+    const char* bodyContent = "<p id='host'>00<b id='one'>11</b>22</p>";
+    const char* shadowContent = "";
+    setBodyContent(bodyContent);
+    RefPtrWillBeRawPtr<ShadowRoot> shadowRoot = setShadowContent(shadowContent);
+    RefPtrWillBeRawPtr<Element> host = document().getElementById("host");
+
+    EXPECT_EQ(PositionInComposedTree(host, PositionInComposedTree::PositionIsAfterChildren), toPositionInComposedTree(positionInDOMTree(*shadowRoot, 0)));
+}
+
 } // namespace blink