[Smart Text] Make SurroundingText work for input elements

third_party/WebKit/Source/core/editing/SurroundingTextTest.cpp

 // Copyright 2014 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/SurroundingText.h"
 
+#include <memory>
 #include "core/dom/Document.h"
 #include "core/dom/Range.h"
 #include "core/dom/Text.h"
 #include "core/editing/Position.h"
 #include "core/editing/VisibleSelection.h"
 #include "core/html/HTMLElement.h"
+#include "core/html/TextControlElement.h"
 #include "core/testing/DummyPageHolder.h"
 #include "testing/gtest/include/gtest/gtest.h"
-#include <memory>
 
 namespace blink {
 
 class SurroundingTextTest : public ::testing::Test {
  protected:
   Document& GetDocument() const { return dummy_page_holder_->GetDocument(); }
   void SetHTML(const String&);
   VisibleSelection Select(int offset) { return Select(offset, offset); }
   VisibleSelection Select(int start, int end);
 
@@ skipping 243 matching lines @@
     SurroundingText surrounding_text(
         *CreateRange(FirstEphemeralRangeOf(selection)), 1337);
 
     EXPECT_EQ("This is outside of foo bar the selected node",
               surrounding_text.Content().SimplifyWhiteSpace());
     EXPECT_EQ(20u, surrounding_text.StartOffsetInContent());
     EXPECT_EQ(27u, surrounding_text.EndOffsetInContent());
   }
 }
 
+TEST_F(SurroundingTextTest, TextAreaSelection) {
+  SetHTML(
+      String("<p>First paragraph</p>"
+             "<textarea id='selection'>abc def ghi</textarea>"
+             "<p>Second paragraph</p>"));
+
+  TextControlElement* text_ctrl =
+      (TextControlElement*)GetDocument().getElementById("selection");
+
+  text_ctrl->SetSelectionRange(4, 7);
+  VisibleSelection selection = CreateVisibleSelection(text_ctrl->Selection());
+
+  SurroundingText surrounding_text(
+      *CreateRange(FirstEphemeralRangeOf(selection)), 20);
+
+  EXPECT_EQ("abc def ghi", surrounding_text.Content().SimplifyWhiteSpace());
+  EXPECT_EQ(4u, surrounding_text.StartOffsetInContent());
+  EXPECT_EQ(7u, surrounding_text.EndOffsetInContent());
+}
+
 }  // namespace blink