Password support for NativeTextfieldViews, in the model

base/utf_offset_string_conversions_unittest.cc

-// 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.
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "base/string_piece.h"
 #include "base/utf_offset_string_conversions.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace base {
 
 namespace {
 
 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;
     size_t input_offset;
     size_t output_offset;
   } utf8_to_utf16_cases[] = {
     {"", 0, kNpos},
     {"\xe4\xbd\xa0\xe5\xa5\xbd", 1, kNpos},
     {"\xe4\xbd\xa0\xe5\xa5\xbd", 3, 1},
     {"\xed\xb0\x80z", 3, 1},
@@ skipping 114 matching lines @@
       offset_adjuster.Add(OffsetAdjuster::Adjustment(15, 2, 0));
     }
     size_t expected_3[] = {kNpos, kNpos, kNpos, 0, 1, kNpos, kNpos, kNpos, 5, 6,
                            7, 8, kNpos, kNpos, 11, kNpos, kNpos};
     EXPECT_EQ(offsets.size(), arraysize(expected_3));
     for (size_t i = 0; i < arraysize(expected_3); ++i)
       EXPECT_EQ(expected_3[i], offsets[i]);
   }
 }
 
-}  // namaspace base
+}  // namespace base