Locate test data more robustly

util/test/paths.h

+// Copyright 2015 The Crashpad Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef CRASHPAD_UTIL_TEST_PATHS_H_
+#define CRASHPAD_UTIL_TEST_PATHS_H_
+
+#include "base/basictypes.h"
+#include "base/files/file_path.h"
+
+namespace crashpad {
+namespace test {
+
+//! \brief Functions to obtain paths from within tests.
+class Paths {
+ public:
+  //! \brief Returns the pathname of the currently-running test executable.
+  static base::FilePath Executable();
+
+  //! \brief Returns the pathname of the test data root.
+  //!
+  //! If the `CRASHPAD_TEST_DATA_ROOT` environment variable is set, its value
+  //! will be returned. Otherwise, this function will attempt to locate the test
+  //! data root relative to the executable path. If this fails, it will fall
+  //! back to returning the current working directory.
+  //!
+  //! At present, the test data root is normally the root of the Crashpad source
+  //! tree, although this may not be the case indefinitely. This function may
+  //! only be used to locate test data, not for arbitrary access to source
+  //! files.
+  static base::FilePath TestDataRoot();
+
+  DISALLOW_IMPLICIT_CONSTRUCTORS(Paths);
+};
+
+}  // namespace test
+}  // namespace crashpad
+
+#endif  // CRASHPAD_UTIL_TEST_PATHS_H_