Password support for NativeTextfieldViews, in the model

base/utf_offset_string_conversions_unittest.cc

Index: base/utf_offset_string_conversions_unittest.cc
diff --git a/base/utf_offset_string_conversions_unittest.cc b/base/utf_offset_string_conversions_unittest.cc
index ff03a750533733e0544b240e37521a539381940f..a96d2ac03d3145c3240fcb7a497f0e9cc904cb7a 100644
--- a/base/utf_offset_string_conversions_unittest.cc
+++ b/base/utf_offset_string_conversions_unittest.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Copyright (c) 2012 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.
 
@@ -17,6 +17,28 @@ static const size_t kNpos = string16::npos;
 
 }  // namespace
 
+TEST(UTFOffsetStringConversionsTest, IndexOffsetConversions) {
+  // Valid surrogate pair surrounded by unpaired surrogates
+  const char16 foo[] = {0xDC00, 0xD800, 0xD800, 0xDFFF, 0xDFFF, 0xDBFF, 0};
+  const string16 s(foo);
+  const size_t the_invalid_index = 3;
+  for (size_t i = 0; i <= s.length(); ++i)
+    EXPECT_EQ(i != the_invalid_index, IsValidCodePointIndex(s, i));
+  for (size_t i = 0; i <= s.length(); ++i) {
+    for (size_t j = i; j <= s.length(); ++j) {
+      ptrdiff_t offset = static_cast<ptrdiff_t>(j - i);
+      if (i <= the_invalid_index && j > the_invalid_index)
+        --offset;
+      EXPECT_EQ(offset, Utf16IndexToOffset(s, i, j));
+      EXPECT_EQ(-offset, Utf16IndexToOffset(s, j, i));
+      size_t adjusted_j = (j == the_invalid_index) ? j + 1 : j;
+      EXPECT_EQ(adjusted_j, Utf16OffsetToIndex(s, i, offset));
+      size_t adjusted_i = (i == the_invalid_index) ? i + 1 : i;
+      EXPECT_EQ(adjusted_i, Utf16OffsetToIndex(s, j, -offset));
+    }
+  }
+}
+
 TEST(UTFOffsetStringConversionsTest, AdjustOffset) {
   struct UTF8ToUTF16Case {
     const char* utf8;
@@ -151,4 +173,4 @@ TEST(UTFOffsetStringConversionsTest, AdjustOffsets) {
   }
 }
 
-}  // namaspace base
+}  // namespace base