Prepare ntcore for merge into allwpilib.

ntcore/src/test/native/cpp/TestPrinters.h

@@ -0,0 +1,54 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) FIRST 2017-2018. All Rights Reserved.                        */
+/* Open Source Software - may be modified and shared by FRC teams. The code   */
+/* must be accompanied by the FIRST BSD license file in the root directory of */
+/* the project.                                                               */
+/*----------------------------------------------------------------------------*/
+
+#ifndef NTCORE_TESTPRINTERS_H_
+#define NTCORE_TESTPRINTERS_H_
+
+#include <memory>
+#include <ostream>
+
+#include <llvm/StringRef.h>
+
+#include "gtest/gtest.h"
+
+namespace llvm {
+
+inline void PrintTo(StringRef str, ::std::ostream* os) {
+  ::testing::internal::PrintStringTo(str.str(), os);
+}
+
+}  // namespace llvm
+
+namespace nt {
+
+class EntryNotification;
+class Handle;
+class Message;
+class Value;
+
+void PrintTo(const EntryNotification& event, std::ostream* os);
+void PrintTo(const Handle& handle, std::ostream* os);
+
+void PrintTo(const Message& msg, std::ostream* os);
+
+inline void PrintTo(std::shared_ptr<Message> msg, std::ostream* os) {
+  *os << "shared_ptr{";
+  if (msg) PrintTo(*msg, os);
+  *os << '}';
+}
+
+void PrintTo(const Value& value, std::ostream* os);
+
+inline void PrintTo(std::shared_ptr<Value> value, std::ostream* os) {
+  *os << "shared_ptr{";
+  if (value) PrintTo(*value, os);
+  *os << '}';
+}
+
+}  // namespace nt
+
+#endif  // NTCORE_TESTPRINTERS_H_