Move base to DEPS

base/memory/singleton_unittest.cc

-// Copyright (c) 2012 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/at_exit.h"
-#include "base/memory/singleton.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-namespace {
-
-COMPILE_ASSERT(DefaultSingletonTraits<int>::kRegisterAtExit == true, a);
-
-typedef void (*CallbackFunc)();
-
-class IntSingleton {
- public:
-  static IntSingleton* GetInstance() {
-    return Singleton<IntSingleton>::get();
-  }
-
-  int value_;
-};
-
-class Init5Singleton {
- public:
-  struct Trait;
-
-  static Init5Singleton* GetInstance() {
-    return Singleton<Init5Singleton, Trait>::get();
-  }
-
-  int value_;
-};
-
-struct Init5Singleton::Trait : public DefaultSingletonTraits<Init5Singleton> {
-  static Init5Singleton* New() {
-    Init5Singleton* instance = new Init5Singleton();
-    instance->value_ = 5;
-    return instance;
-  }
-};
-
-int* SingletonInt() {
-  return &IntSingleton::GetInstance()->value_;
-}
-
-int* SingletonInt5() {
-  return &Init5Singleton::GetInstance()->value_;
-}
-
-template <typename Type>
-struct CallbackTrait : public DefaultSingletonTraits<Type> {
-  static void Delete(Type* instance) {
-    if (instance->callback_)
-      (instance->callback_)();
-    DefaultSingletonTraits<Type>::Delete(instance);
-  }
-};
-
-class CallbackSingleton {
- public:
-  CallbackSingleton() : callback_(NULL) { }
-  CallbackFunc callback_;
-};
-
-class CallbackSingletonWithNoLeakTrait : public CallbackSingleton {
- public:
-  struct Trait : public CallbackTrait<CallbackSingletonWithNoLeakTrait> { };
-
-  CallbackSingletonWithNoLeakTrait() : CallbackSingleton() { }
-
-  static CallbackSingletonWithNoLeakTrait* GetInstance() {
-    return Singleton<CallbackSingletonWithNoLeakTrait, Trait>::get();
-  }
-};
-
-class CallbackSingletonWithLeakTrait : public CallbackSingleton {
- public:
-  struct Trait : public CallbackTrait<CallbackSingletonWithLeakTrait> {
-    static const bool kRegisterAtExit = false;
-  };
-
-  CallbackSingletonWithLeakTrait() : CallbackSingleton() { }
-
-  static CallbackSingletonWithLeakTrait* GetInstance() {
-    return Singleton<CallbackSingletonWithLeakTrait, Trait>::get();
-  }
-};
-
-class CallbackSingletonWithStaticTrait : public CallbackSingleton {
- public:
-  struct Trait;
-
-  CallbackSingletonWithStaticTrait() : CallbackSingleton() { }
-
-  static CallbackSingletonWithStaticTrait* GetInstance() {
-    return Singleton<CallbackSingletonWithStaticTrait, Trait>::get();
-  }
-};
-
-struct CallbackSingletonWithStaticTrait::Trait
-    : public StaticMemorySingletonTraits<CallbackSingletonWithStaticTrait> {
-  static void Delete(CallbackSingletonWithStaticTrait* instance) {
-    if (instance->callback_)
-      (instance->callback_)();
-    StaticMemorySingletonTraits<CallbackSingletonWithStaticTrait>::Delete(
-        instance);
-  }
-};
-
-template <class Type>
-class AlignedTestSingleton {
- public:
-  AlignedTestSingleton() {}
-  ~AlignedTestSingleton() {}
-  static AlignedTestSingleton* GetInstance() {
-    return Singleton<AlignedTestSingleton,
-        StaticMemorySingletonTraits<AlignedTestSingleton> >::get();
-  }
-
-  Type type_;
-};
-
-
-void SingletonNoLeak(CallbackFunc CallOnQuit) {
-  CallbackSingletonWithNoLeakTrait::GetInstance()->callback_ = CallOnQuit;
-}
-
-void SingletonLeak(CallbackFunc CallOnQuit) {
-  CallbackSingletonWithLeakTrait::GetInstance()->callback_ = CallOnQuit;
-}
-
-CallbackFunc* GetLeakySingleton() {
-  return &CallbackSingletonWithLeakTrait::GetInstance()->callback_;
-}
-
-void DeleteLeakySingleton() {
-  DefaultSingletonTraits<CallbackSingletonWithLeakTrait>::Delete(
-      CallbackSingletonWithLeakTrait::GetInstance());
-}
-
-void SingletonStatic(CallbackFunc CallOnQuit) {
-  CallbackSingletonWithStaticTrait::GetInstance()->callback_ = CallOnQuit;
-}
-
-CallbackFunc* GetStaticSingleton() {
-  return &CallbackSingletonWithStaticTrait::GetInstance()->callback_;
-}
-
-}  // namespace
-
-class SingletonTest : public testing::Test {
- public:
-  SingletonTest() {}
-
-  void SetUp() override {
-    non_leak_called_ = false;
-    leaky_called_ = false;
-    static_called_ = false;
-  }
-
- protected:
-  void VerifiesCallbacks() {
-    EXPECT_TRUE(non_leak_called_);
-    EXPECT_FALSE(leaky_called_);
-    EXPECT_TRUE(static_called_);
-    non_leak_called_ = false;
-    leaky_called_ = false;
-    static_called_ = false;
-  }
-
-  void VerifiesCallbacksNotCalled() {
-    EXPECT_FALSE(non_leak_called_);
-    EXPECT_FALSE(leaky_called_);
-    EXPECT_FALSE(static_called_);
-    non_leak_called_ = false;
-    leaky_called_ = false;
-    static_called_ = false;
-  }
-
-  static void CallbackNoLeak() {
-    non_leak_called_ = true;
-  }
-
-  static void CallbackLeak() {
-    leaky_called_ = true;
-  }
-
-  static void CallbackStatic() {
-    static_called_ = true;
-  }
-
- private:
-  static bool non_leak_called_;
-  static bool leaky_called_;
-  static bool static_called_;
-};
-
-bool SingletonTest::non_leak_called_ = false;
-bool SingletonTest::leaky_called_ = false;
-bool SingletonTest::static_called_ = false;
-
-TEST_F(SingletonTest, Basic) {
-  int* singleton_int;
-  int* singleton_int_5;
-  CallbackFunc* leaky_singleton;
-  CallbackFunc* static_singleton;
-
-  {
-    base::ShadowingAtExitManager sem;
-    {
-      singleton_int = SingletonInt();
-    }
-    // Ensure POD type initialization.
-    EXPECT_EQ(*singleton_int, 0);
-    *singleton_int = 1;
-
-    EXPECT_EQ(singleton_int, SingletonInt());
-    EXPECT_EQ(*singleton_int, 1);
-
-    {
-      singleton_int_5 = SingletonInt5();
-    }
-    // Is default initialized to 5.
-    EXPECT_EQ(*singleton_int_5, 5);
-
-    SingletonNoLeak(&CallbackNoLeak);
-    SingletonLeak(&CallbackLeak);
-    SingletonStatic(&CallbackStatic);
-    static_singleton = GetStaticSingleton();
-    leaky_singleton = GetLeakySingleton();
-    EXPECT_TRUE(leaky_singleton);
-  }
-
-  // Verify that only the expected callback has been called.
-  VerifiesCallbacks();
-  // Delete the leaky singleton.
-  DeleteLeakySingleton();
-
-  // The static singleton can't be acquired post-atexit.
-  EXPECT_EQ(NULL, GetStaticSingleton());
-
-  {
-    base::ShadowingAtExitManager sem;
-    // Verifiy that the variables were reset.
-    {
-      singleton_int = SingletonInt();
-      EXPECT_EQ(*singleton_int, 0);
-    }
-    {
-      singleton_int_5 = SingletonInt5();
-      EXPECT_EQ(*singleton_int_5, 5);
-    }
-    {
-      // Resurrect the static singleton, and assert that it
-      // still points to the same (static) memory.
-      CallbackSingletonWithStaticTrait::Trait::Resurrect();
-      EXPECT_EQ(GetStaticSingleton(), static_singleton);
-    }
-  }
-  // The leaky singleton shouldn't leak since SingletonLeak has not been called.
-  VerifiesCallbacksNotCalled();
-}
-
-#define EXPECT_ALIGNED(ptr, align) \
-    EXPECT_EQ(0u, reinterpret_cast<uintptr_t>(ptr) & (align - 1))
-
-TEST_F(SingletonTest, Alignment) {
-  using base::AlignedMemory;
-
-  // Create some static singletons with increasing sizes and alignment
-  // requirements. By ordering this way, the linker will need to do some work to
-  // ensure proper alignment of the static data.
-  AlignedTestSingleton<int32>* align4 =
-      AlignedTestSingleton<int32>::GetInstance();
-  AlignedTestSingleton<AlignedMemory<32, 32> >* align32 =
-      AlignedTestSingleton<AlignedMemory<32, 32> >::GetInstance();
-  AlignedTestSingleton<AlignedMemory<128, 128> >* align128 =
-      AlignedTestSingleton<AlignedMemory<128, 128> >::GetInstance();
-  AlignedTestSingleton<AlignedMemory<4096, 4096> >* align4096 =
-      AlignedTestSingleton<AlignedMemory<4096, 4096> >::GetInstance();
-
-  EXPECT_ALIGNED(align4, 4);
-  EXPECT_ALIGNED(align32, 32);
-  EXPECT_ALIGNED(align128, 128);
-  EXPECT_ALIGNED(align4096, 4096);
-}