C bindings: Implement _Validate(), and some pre-requisites

mojo/public/cpp/bindings/tests/validation_util.h

+// Copyright 2016 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.
+
+// This file contains utility functions for reading and parsing validation data
+// files.
+
+#ifndef MOJO_PUBLIC_CPP_BINDINGS_TESTS_VALIDATION_UTIL_H_
+#define MOJO_PUBLIC_CPP_BINDINGS_TESTS_VALIDATION_UTIL_H_
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include <string>
+#include <vector>
+
+namespace mojo {
+namespace test {
+namespace validation_util {
+
+// Given |test_name|, which is the filename of a test file (excluding the
+// extension), reads in and parses the binary test data (stored in |data|), the
+// number of expected handles (stored in |num_handles|), and the expected
+// validation string (stored in |expected|).
+bool ReadTestCase(const std::string& test_name,
+                  std::vector<uint8_t>* data,
+                  size_t* num_handles,
+                  std::string* expected);
+
+// Gets a list of matching tests with prefix |prefix|; these list of tests are
+// file names of the tests, without the '.data' extension.
+std::vector<std::string> GetMatchingTests(const std::string& prefix);
+
+}  // namespace validation_util
+}  // namespace test
+}  // namespace mojo
+
+#endif  // MOJO_PUBLIC_CPP_BINDINGS_TESTS_VALIDATION_UTIL_H_