Utilize Position::IsEquivalent() in {Up,Down}streamIgnoringEditingBoundaries()

third_party/WebKit/Source/core/editing/VisibleUnitsTest.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 "core/editing/VisibleUnits.h"
 
 #include <ostream>  // NOLINT
 #include "bindings/core/v8/V8BindingForTesting.h"
 #include "core/dom/Text.h"
 #include "core/editing/EditingTestBase.h"
@@ skipping 275 matching lines @@
 
   Element* sample = GetDocument().getElementById("sample");
   Node* text = sample->firstChild();
 
   const InlineBoxPosition& actual =
       ComputeInlineBoxPosition(Position(text, 0), TextAffinity::kDownstream);
   EXPECT_EQ(ToLayoutText(text->GetLayoutObject())->FirstTextBox(),
             actual.inline_box);
 }
 
+// http://crbug.com/716093
+TEST_F(VisibleUnitsTest, ComputeInlineBoxPositionMixedEditable) {
+  SetBodyContent(
+      "<div contenteditable id=sample>abc<input contenteditable=false></div>");
+  Element* const sample = GetDocument().getElementById("sample");
+
+  const InlineBoxPosition& actual = ComputeInlineBoxPosition(
+      Position::LastPositionInNode(sample), TextAffinity::kDownstream);
+  // Should not be in infinite-loop
+  EXPECT_EQ(nullptr, actual.inline_box);
+  // TODO(editing-dev): We should return 0 for |InlineBoxPosition| when
+  // |inline_box| is null.
+  EXPECT_EQ(2, actual.offset_in_box);
+}
+
 TEST_F(VisibleUnitsTest, endOfDocument) {
   const char* body_content = "<a id=host><b id=one>1</b><b id=two>22</b></a>";
   const char* shadow_content =
       "<p><content select=#two></content></p><p><content "
       "select=#one></content></p>";
   SetBodyContent(body_content);
   SetShadowContent(shadow_content, "host");
 
   Element* one = GetDocument().getElementById("one");
   Element* two = GetDocument().getElementById("two");
@@ skipping 1668 matching lines @@
        canonicalizationWithCollapsedSpaceAndIsolatedCombiningCharacter) {
   SetBodyContent("<p>  &#x20E3;</p>");  // Leading space is necessary
 
   Node* paragraph = GetDocument().QuerySelector("p");
   Node* text = paragraph->firstChild();
   Position start = CanonicalPositionOf(Position::BeforeNode(paragraph));
   EXPECT_EQ(Position(text, 2), start);
 }
 
 }  // namespace blink