Add test for StringToCode and StringToWideString.

core/src/fpdfapi/fpdf_font/fpdf_font_unittest.cpp

+// Copyright 2015 PDFium 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 "testing/gtest/include/gtest/gtest.h"
+
+#include "font_int.h"
+
+TEST(fpdf_font, StringToCode) {
+  EXPECT_EQ(0, CPDF_ToUnicodeMap::StringToCode(""));
+  EXPECT_EQ(194, CPDF_ToUnicodeMap::StringToCode("<c2"));
+  EXPECT_EQ(162, CPDF_ToUnicodeMap::StringToCode("<A2"));
+  EXPECT_EQ(2802, CPDF_ToUnicodeMap::StringToCode("<Af2"));
+  EXPECT_EQ(12, CPDF_ToUnicodeMap::StringToCode("12"));
+  EXPECT_EQ(128, CPDF_ToUnicodeMap::StringToCode("128"));
+}
+
+TEST(fpdf_font, StringToWideString) {
+  EXPECT_EQ(L"", CPDF_ToUnicodeMap::StringToWideString(""));
+  EXPECT_EQ(L"", CPDF_ToUnicodeMap::StringToWideString("1234"));
+
+  EXPECT_EQ(L"", CPDF_ToUnicodeMap::StringToWideString("<c2"));
+
+  CFX_WideString res = L"\xc2ab";
+  EXPECT_EQ(res, CPDF_ToUnicodeMap::StringToWideString("<c2ab"));
+  EXPECT_EQ(res, CPDF_ToUnicodeMap::StringToWideString("<c2abab"));
+  EXPECT_EQ(res, CPDF_ToUnicodeMap::StringToWideString("<c2ab 1234"));
+
+  res += L"\xfaab";
+  EXPECT_EQ(res, CPDF_ToUnicodeMap::StringToWideString("<c2abFaAb"));
+}