base/type_id_unittest.cc

// Copyright 2018 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.

#include "base/type_id.h"

#include "base/test/type_id_test_support_a.h"
#include "base/test/type_id_test_support_b.h"
#include "testing/gtest/include/gtest/gtest.h"

namespace base {

namespace {

struct T {};

struct U {};

}  // namespace

TEST(TypeId, Basic) {
  static_assert(TypeId::Create<int>() == TypeId::Create<int>(), "");
  static_assert(TypeId::Create<int>() != TypeId::Create<void>(), "");
  static_assert(TypeId::Create<int>() != TypeId::Create<float>(), "");
  static_assert(TypeId::Create<int>() != TypeId::Create<std::unique_ptr<T>>(),
                "");
  static_assert(TypeId::Create<int>() != TypeId::Create<std::unique_ptr<U>>(),
                "");

  static_assert(TypeId::Create<void>() != TypeId::Create<int>(), "");
  static_assert(TypeId::Create<void>() == TypeId::Create<void>(), "");
  static_assert(TypeId::Create<void>() != TypeId::Create<float>(), "");
  static_assert(TypeId::Create<void>() != TypeId::Create<std::unique_ptr<T>>(),
                "");
  static_assert(TypeId::Create<void>() != TypeId::Create<std::unique_ptr<U>>(),
                "");

  static_assert(TypeId::Create<float>() != TypeId::Create<int>(), "");
  static_assert(TypeId::Create<float>() != TypeId::Create<void>(), "");
  static_assert(TypeId::Create<float>() == TypeId::Create<float>(), "");
  static_assert(TypeId::Create<float>() != TypeId::Create<std::unique_ptr<T>>(),
                "");
  static_assert(TypeId::Create<float>() != TypeId::Create<std::unique_ptr<U>>(),
                "");

  static_assert(TypeId::Create<std::unique_ptr<T>>() != TypeId::Create<int>(),
                "");
  static_assert(TypeId::Create<std::unique_ptr<T>>() != TypeId::Create<void>(),
                "");
  static_assert(TypeId::Create<std::unique_ptr<T>>() != TypeId::Create<float>(),
                "");
  static_assert(TypeId::Create<std::unique_ptr<T>>() ==
                    TypeId::Create<std::unique_ptr<T>>(),
                "");
  static_assert(TypeId::Create<std::unique_ptr<T>>() !=
                    TypeId::Create<std::unique_ptr<U>>(),
                "");

  static_assert(TypeId::Create<std::unique_ptr<U>>() != TypeId::Create<int>(),
                "");
  static_assert(TypeId::Create<std::unique_ptr<U>>() != TypeId::Create<void>(),
                "");
  static_assert(TypeId::Create<std::unique_ptr<U>>() != TypeId::Create<float>(),
                "");
  static_assert(TypeId::Create<std::unique_ptr<U>>() !=
                    TypeId::Create<std::unique_ptr<T>>(),
                "");
  static_assert(TypeId::Create<std::unique_ptr<U>>() ==
                    TypeId::Create<std::unique_ptr<U>>(),
                "");
}

TEST(TypeId, TypesInAnonymousNameSpacesDontCollide) {
  EXPECT_NE(TypeIdTestSupportA::GetTypeIdForTypeInAnonymousNameSpace(),
            TypeIdTestSupportB::GetTypeIdForTypeInAnonymousNameSpace());
}

TEST(TypeId, IdenticalTypesFromDifferentCompilationUnitsMatch) {
  EXPECT_EQ(TypeIdTestSupportA::GetTypeIdForUniquePtrInt(),
            TypeIdTestSupportB::GetTypeIdForUniquePtrInt());
}

}  // namespace base