Merge to XFA: Add path service to retrieve test data directory at run time so tests can be run from…

testing/utils/path_service.h

+// 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.
+
+#ifndef TESTING_UTILS_PATH_SERVICE_H_
+#define TESTING_UTILS_PATH_SERVICE_H_
+
+#include <string>
+
+#ifdef _WIN32
+#define PATH_SEPARATOR '\\'
+#else
+#define PATH_SEPARATOR '/'
+#endif
+
+// Get the various file directory and path information.
+class PathService {
+ public:
+  // Return true when the path ends with a path separator.
+  static bool EndsWithSeparator(const std::string& path);
+
+  // Retrieve the directory where executables run from.
+  static bool GetExecutableDir(std::string* path);
+
+  // Retrieve the root directory of the source tree.
+  // Assume executables always run from out/<Debug|Release>/, the source
+  // directory is two levels above the executable directory.
+  static bool GetSourceDir(std::string* path);
+
+  // Retrieve the test data directory where test files are stored.
+  // Currently, the test dir is under <source_dir>/testing/resources/.
+  static bool GetTestDataDir(std::string* path);
+
+  // Get the full path for a test file under the test data directory.
+  static bool GetTestFilePath(const std::string& file_name, std::string* path);
+};
+#endif  // TESTING_UTILS_PATH_SERVICE_H_