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diff --git a/o3d/utils/cross/file_path_utils_test.cc b/o3d/utils/cross/file_path_utils_test.cc
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+/*
+ * Copyright 2009, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+// This file contains the tests of the file path utils.
+#include <stdio.h>
+
+#include "base/file_path.h"
+#include "base/file_util.h"
+#include "tests/common/win/testing_common.h"
+#include "utils/cross/file_path_utils.h"
+
+namespace o3d {
+
+class FilePathUtilsTest : public testing::Test {
+};
+
+TEST_F(FilePathUtilsTest, ConvertFilePathToUTF8) {
+  std::string test_path("/this/is/a/path");
+  FilePath source_path(FILE_PATH_LITERAL("/this/is/a/path"));
+  EXPECT_EQ(test_path, FilePathToUTF8(source_path));
+}
+
+TEST_F(FilePathUtilsTest, ConvertFilePathToWide) {
+  std::wstring test_path(L"/this/is/a/path");
+  FilePath source_path(FILE_PATH_LITERAL("/this/is/a/path"));
+  EXPECT_EQ(test_path, FilePathToWide(source_path));
+}
+
+TEST_F(FilePathUtilsTest, ConvertWideToFilePath) {
+  std::wstring test_path(L"/this/is/a/path");
+  FilePath dest_path = WideToFilePath(test_path);
+  EXPECT_STREQ(FILE_PATH_LITERAL("/this/is/a/path"), dest_path.value().c_str());
+}
+
+TEST_F(FilePathUtilsTest, ConvertUTF8ToFilePath) {
+  std::string test_path("/this/is/a/path");
+  FilePath dest_path = UTF8ToFilePath(test_path);
+  EXPECT_STREQ(FILE_PATH_LITERAL("/this/is/a/path"), dest_path.value().c_str());
+}
+
+TEST_F(FilePathUtilsTest, AbsolutePathBasic) {
+  FilePath cwd;
+  file_util::GetCurrentDirectory(&cwd);
+#if defined(OS_WIN)
+  FilePath test_path(FILE_PATH_LITERAL("this\\is\\a\\path"));
+#else
+  FilePath test_path(FILE_PATH_LITERAL("this/is/a/path"));
+#endif
+  FilePath abs_path = test_path;
+  bool result = AbsolutePath(&abs_path);
+  FilePath expected_result = cwd;
+  expected_result = expected_result.Append(test_path);
+  EXPECT_STREQ(expected_result.value().c_str(), abs_path.value().c_str());
+}
+
+TEST_F(FilePathUtilsTest, AbsolutePathAlreadyAbsolute) {
+#if defined(OS_WIN)
+  FilePath test_path(FILE_PATH_LITERAL("c:\\this\\is\\a\\path"));
+#else
+  FilePath test_path(FILE_PATH_LITERAL("/this/is/a/path"));
+#endif
+  FilePath abs_path = test_path;
+  bool result = AbsolutePath(&abs_path);
+  EXPECT_STREQ(test_path.value().c_str(), abs_path.value().c_str());
+}
+
+#if defined(OS_WIN)
+TEST_F(FilePathUtilsTest, AbsolutePathAlreadyAbsoluteWindowsUnc) {
+  FilePath test_path(FILE_PATH_LITERAL("\\\\this\\is\\a\\path"));
+  FilePath abs_path = test_path;
+  bool result = AbsolutePath(&abs_path);
+  EXPECT_STREQ(test_path.value().c_str(), abs_path.value().c_str());
+}
+#endif
+
+TEST_F(FilePathUtilsTest, RelativePathsBasic) {
+#if defined(OS_WIN)
+  FilePath expected_result(FILE_PATH_LITERAL("under\\parent"));
+#else
+  FilePath expected_result(FILE_PATH_LITERAL("under/parent"));
+#endif
+  FilePath base_path(FILE_PATH_LITERAL("/this/is/a/path"));
+  FilePath child_path(FILE_PATH_LITERAL("/this/is/a/path/under/parent"));
+  FilePath result;
+  bool is_relative = GetRelativePathIfPossible(base_path, child_path, &result);
+  EXPECT_STREQ(expected_result.value().c_str(), result.value().c_str());
+  EXPECT_TRUE(is_relative);
+}
+
+#if defined(OS_WIN)
+TEST_F(FilePathUtilsTest, RelativePathsWindowsAbsolute) {
+  FilePath expected_result(FILE_PATH_LITERAL("under\\parent"));
+  FilePath base_path(FILE_PATH_LITERAL("c:\\this\\is\\a\\path"));
+  FilePath child_path(
+      FILE_PATH_LITERAL("c:\\this\\is\\a\\path\\under\\parent"));
+  FilePath result;
+  bool is_relative = GetRelativePathIfPossible(base_path, child_path, &result);
+  EXPECT_STREQ(expected_result.value().c_str(), result.value().c_str());
+  EXPECT_TRUE(is_relative);
+}
+
+TEST_F(FilePathUtilsTest, RelativePathsWindowsDifferentDrives) {
+  FilePath base_path(FILE_PATH_LITERAL("c:\\this\\is\\a\\path"));
+  FilePath child_path(
+      FILE_PATH_LITERAL("d:\\this\\is\\a\\path\\not\\under\\parent"));
+  FilePath result;
+  bool is_relative = GetRelativePathIfPossible(base_path, child_path, &result);
+  EXPECT_STREQ(child_path.value().c_str(), result.value().c_str());
+  EXPECT_FALSE(is_relative);
+}
+#endif
+
+TEST_F(FilePathUtilsTest, RelativePathsCaseDifferent) {
+  FilePath base_path(FILE_PATH_LITERAL("/This/Is/A/Path"));
+  FilePath child_path(FILE_PATH_LITERAL("/this/is/a/path/under/parent"));
+  FilePath result;
+  bool is_relative = GetRelativePathIfPossible(base_path, child_path, &result);
+#if defined(OS_WIN)
+  EXPECT_STREQ(FILE_PATH_LITERAL("under\\parent"), result.value().c_str());
+  EXPECT_TRUE(is_relative);
+#else
+  EXPECT_STREQ(child_path.value().c_str(), result.value().c_str());
+  EXPECT_FALSE(is_relative);
+#endif
+}
+
+TEST_F(FilePathUtilsTest, RelativePathsTrailingSlash) {
+#if defined(OS_WIN)
+  FilePath expected_result(FILE_PATH_LITERAL("under\\parent"));
+#else
+  FilePath expected_result(FILE_PATH_LITERAL("under/parent"));
+#endif
+  FilePath base_path(FILE_PATH_LITERAL("/this/is/a/path/"));
+  FilePath child_path(FILE_PATH_LITERAL("/this/is/a/path/under/parent"));
+  FilePath result;
+  bool is_relative = GetRelativePathIfPossible(base_path, child_path, &result);
+  EXPECT_STREQ(expected_result.value().c_str(), result.value().c_str());
+  EXPECT_TRUE(is_relative);
+}
+
+TEST_F(FilePathUtilsTest, RelativePathsRelativeInputs) {
+#if defined(OS_WIN)
+  FilePath expected_result(FILE_PATH_LITERAL("under\\parent"));
+#else
+  FilePath expected_result(FILE_PATH_LITERAL("under/parent"));
+#endif
+  FilePath base_path(FILE_PATH_LITERAL("this/is/a/path"));
+  FilePath child_path(FILE_PATH_LITERAL("this/is/a/path/under/parent"));
+  FilePath result;
+  bool is_relative = GetRelativePathIfPossible(base_path, child_path, &result);
+  EXPECT_STREQ(expected_result.value().c_str(), result.value().c_str());
+  EXPECT_TRUE(is_relative);
+}
+}  // namespace o3d