Move base to DEPS

base/memory/scoped_vector_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/memory/scoped_vector.h"
-
-#include "base/bind.h"
-#include "base/callback.h"
-#include "base/memory/scoped_ptr.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-namespace {
-
-// The LifeCycleObject notifies its Observer upon construction & destruction.
-class LifeCycleObject {
- public:
-  class Observer {
-   public:
-    virtual void OnLifeCycleConstruct(LifeCycleObject* o) = 0;
-    virtual void OnLifeCycleDestroy(LifeCycleObject* o) = 0;
-
-   protected:
-    virtual ~Observer() {}
-  };
-
-  ~LifeCycleObject() {
-    observer_->OnLifeCycleDestroy(this);
-  }
-
- private:
-  friend class LifeCycleWatcher;
-
-  explicit LifeCycleObject(Observer* observer)
-      : observer_(observer) {
-    observer_->OnLifeCycleConstruct(this);
-  }
-
-  Observer* observer_;
-
-  DISALLOW_COPY_AND_ASSIGN(LifeCycleObject);
-};
-
-// The life cycle states we care about for the purposes of testing ScopedVector
-// against objects.
-enum LifeCycleState {
-  LC_INITIAL,
-  LC_CONSTRUCTED,
-  LC_DESTROYED,
-};
-
-// Because we wish to watch the life cycle of an object being constructed and
-// destroyed, and further wish to test expectations against the state of that
-// object, we cannot save state in that object itself. Instead, we use this
-// pairing of the watcher, which observes the object and notifies of
-// construction & destruction. Since we also may be testing assumptions about
-// things not getting freed, this class also acts like a scoping object and
-// deletes the |constructed_life_cycle_object_|, if any when the
-// LifeCycleWatcher is destroyed. To keep this simple, the only expected state
-// changes are:
-//   INITIAL -> CONSTRUCTED -> DESTROYED.
-// Anything more complicated than that should start another test.
-class LifeCycleWatcher : public LifeCycleObject::Observer {
- public:
-  LifeCycleWatcher() : life_cycle_state_(LC_INITIAL) {}
-  ~LifeCycleWatcher() override {}
-
-  // Assert INITIAL -> CONSTRUCTED and no LifeCycleObject associated with this
-  // LifeCycleWatcher.
-  void OnLifeCycleConstruct(LifeCycleObject* object) override {
-    ASSERT_EQ(LC_INITIAL, life_cycle_state_);
-    ASSERT_EQ(NULL, constructed_life_cycle_object_.get());
-    life_cycle_state_ = LC_CONSTRUCTED;
-    constructed_life_cycle_object_.reset(object);
-  }
-
-  // Assert CONSTRUCTED -> DESTROYED and the |object| being destroyed is the
-  // same one we saw constructed.
-  void OnLifeCycleDestroy(LifeCycleObject* object) override {
-    ASSERT_EQ(LC_CONSTRUCTED, life_cycle_state_);
-    LifeCycleObject* constructed_life_cycle_object =
-        constructed_life_cycle_object_.release();
-    ASSERT_EQ(constructed_life_cycle_object, object);
-    life_cycle_state_ = LC_DESTROYED;
-  }
-
-  LifeCycleState life_cycle_state() const { return life_cycle_state_; }
-
-  // Factory method for creating a new LifeCycleObject tied to this
-  // LifeCycleWatcher.
-  LifeCycleObject* NewLifeCycleObject() {
-    return new LifeCycleObject(this);
-  }
-
-  // Returns true iff |object| is the same object that this watcher is tracking.
-  bool IsWatching(LifeCycleObject* object) const {
-    return object == constructed_life_cycle_object_.get();
-  }
-
- private:
-  LifeCycleState life_cycle_state_;
-  scoped_ptr<LifeCycleObject> constructed_life_cycle_object_;
-
-  DISALLOW_COPY_AND_ASSIGN(LifeCycleWatcher);
-};
-
-TEST(ScopedVectorTest, LifeCycleWatcher) {
-  LifeCycleWatcher watcher;
-  EXPECT_EQ(LC_INITIAL, watcher.life_cycle_state());
-  LifeCycleObject* object = watcher.NewLifeCycleObject();
-  EXPECT_EQ(LC_CONSTRUCTED, watcher.life_cycle_state());
-  delete object;
-  EXPECT_EQ(LC_DESTROYED, watcher.life_cycle_state());
-}
-
-TEST(ScopedVectorTest, PopBack) {
-  LifeCycleWatcher watcher;
-  EXPECT_EQ(LC_INITIAL, watcher.life_cycle_state());
-  ScopedVector<LifeCycleObject> scoped_vector;
-  scoped_vector.push_back(watcher.NewLifeCycleObject());
-  EXPECT_EQ(LC_CONSTRUCTED, watcher.life_cycle_state());
-  EXPECT_TRUE(watcher.IsWatching(scoped_vector.back()));
-  scoped_vector.pop_back();
-  EXPECT_EQ(LC_DESTROYED, watcher.life_cycle_state());
-  EXPECT_TRUE(scoped_vector.empty());
-}
-
-TEST(ScopedVectorTest, Clear) {
-  LifeCycleWatcher watcher;
-  EXPECT_EQ(LC_INITIAL, watcher.life_cycle_state());
-  ScopedVector<LifeCycleObject> scoped_vector;
-  scoped_vector.push_back(watcher.NewLifeCycleObject());
-  EXPECT_EQ(LC_CONSTRUCTED, watcher.life_cycle_state());
-  EXPECT_TRUE(watcher.IsWatching(scoped_vector.back()));
-  scoped_vector.clear();
-  EXPECT_EQ(LC_DESTROYED, watcher.life_cycle_state());
-  EXPECT_TRUE(scoped_vector.empty());
-}
-
-TEST(ScopedVectorTest, WeakClear) {
-  LifeCycleWatcher watcher;
-  EXPECT_EQ(LC_INITIAL, watcher.life_cycle_state());
-  ScopedVector<LifeCycleObject> scoped_vector;
-  scoped_vector.push_back(watcher.NewLifeCycleObject());
-  EXPECT_EQ(LC_CONSTRUCTED, watcher.life_cycle_state());
-  EXPECT_TRUE(watcher.IsWatching(scoped_vector.back()));
-  scoped_vector.weak_clear();
-  EXPECT_EQ(LC_CONSTRUCTED, watcher.life_cycle_state());
-  EXPECT_TRUE(scoped_vector.empty());
-}
-
-TEST(ScopedVectorTest, ResizeShrink) {
-  LifeCycleWatcher first_watcher;
-  EXPECT_EQ(LC_INITIAL, first_watcher.life_cycle_state());
-  LifeCycleWatcher second_watcher;
-  EXPECT_EQ(LC_INITIAL, second_watcher.life_cycle_state());
-  ScopedVector<LifeCycleObject> scoped_vector;
-
-  scoped_vector.push_back(first_watcher.NewLifeCycleObject());
-  EXPECT_EQ(LC_CONSTRUCTED, first_watcher.life_cycle_state());
-  EXPECT_EQ(LC_INITIAL, second_watcher.life_cycle_state());
-  EXPECT_TRUE(first_watcher.IsWatching(scoped_vector[0]));
-  EXPECT_FALSE(second_watcher.IsWatching(scoped_vector[0]));
-
-  scoped_vector.push_back(second_watcher.NewLifeCycleObject());
-  EXPECT_EQ(LC_CONSTRUCTED, first_watcher.life_cycle_state());
-  EXPECT_EQ(LC_CONSTRUCTED, second_watcher.life_cycle_state());
-  EXPECT_FALSE(first_watcher.IsWatching(scoped_vector[1]));
-  EXPECT_TRUE(second_watcher.IsWatching(scoped_vector[1]));
-
-  // Test that shrinking a vector deletes elements in the disappearing range.
-  scoped_vector.resize(1);
-  EXPECT_EQ(LC_CONSTRUCTED, first_watcher.life_cycle_state());
-  EXPECT_EQ(LC_DESTROYED, second_watcher.life_cycle_state());
-  EXPECT_EQ(1u, scoped_vector.size());
-  EXPECT_TRUE(first_watcher.IsWatching(scoped_vector[0]));
-}
-
-TEST(ScopedVectorTest, ResizeGrow) {
-  LifeCycleWatcher watcher;
-  EXPECT_EQ(LC_INITIAL, watcher.life_cycle_state());
-  ScopedVector<LifeCycleObject> scoped_vector;
-  scoped_vector.push_back(watcher.NewLifeCycleObject());
-  EXPECT_EQ(LC_CONSTRUCTED, watcher.life_cycle_state());
-  EXPECT_TRUE(watcher.IsWatching(scoped_vector.back()));
-
-  scoped_vector.resize(5);
-  EXPECT_EQ(LC_CONSTRUCTED, watcher.life_cycle_state());
-  ASSERT_EQ(5u, scoped_vector.size());
-  EXPECT_TRUE(watcher.IsWatching(scoped_vector[0]));
-  EXPECT_FALSE(watcher.IsWatching(scoped_vector[1]));
-  EXPECT_FALSE(watcher.IsWatching(scoped_vector[2]));
-  EXPECT_FALSE(watcher.IsWatching(scoped_vector[3]));
-  EXPECT_FALSE(watcher.IsWatching(scoped_vector[4]));
-}
-
-TEST(ScopedVectorTest, Scope) {
-  LifeCycleWatcher watcher;
-  EXPECT_EQ(LC_INITIAL, watcher.life_cycle_state());
-  {
-    ScopedVector<LifeCycleObject> scoped_vector;
-    scoped_vector.push_back(watcher.NewLifeCycleObject());
-    EXPECT_EQ(LC_CONSTRUCTED, watcher.life_cycle_state());
-    EXPECT_TRUE(watcher.IsWatching(scoped_vector.back()));
-  }
-  EXPECT_EQ(LC_DESTROYED, watcher.life_cycle_state());
-}
-
-TEST(ScopedVectorTest, MoveConstruct) {
-  LifeCycleWatcher watcher;
-  EXPECT_EQ(LC_INITIAL, watcher.life_cycle_state());
-  {
-    ScopedVector<LifeCycleObject> scoped_vector;
-    scoped_vector.push_back(watcher.NewLifeCycleObject());
-    EXPECT_FALSE(scoped_vector.empty());
-    EXPECT_TRUE(watcher.IsWatching(scoped_vector.back()));
-
-    ScopedVector<LifeCycleObject> scoped_vector_copy(scoped_vector.Pass());
-    EXPECT_TRUE(scoped_vector.empty());
-    EXPECT_FALSE(scoped_vector_copy.empty());
-    EXPECT_TRUE(watcher.IsWatching(scoped_vector_copy.back()));
-
-    EXPECT_EQ(LC_CONSTRUCTED, watcher.life_cycle_state());
-  }
-  EXPECT_EQ(LC_DESTROYED, watcher.life_cycle_state());
-}
-
-TEST(ScopedVectorTest, MoveAssign) {
-  LifeCycleWatcher watcher;
-  EXPECT_EQ(LC_INITIAL, watcher.life_cycle_state());
-  {
-    ScopedVector<LifeCycleObject> scoped_vector;
-    scoped_vector.push_back(watcher.NewLifeCycleObject());
-    ScopedVector<LifeCycleObject> scoped_vector_assign;
-    EXPECT_FALSE(scoped_vector.empty());
-    EXPECT_TRUE(watcher.IsWatching(scoped_vector.back()));
-
-    scoped_vector_assign = scoped_vector.Pass();
-    EXPECT_TRUE(scoped_vector.empty());
-    EXPECT_FALSE(scoped_vector_assign.empty());
-    EXPECT_TRUE(watcher.IsWatching(scoped_vector_assign.back()));
-
-    EXPECT_EQ(LC_CONSTRUCTED, watcher.life_cycle_state());
-  }
-  EXPECT_EQ(LC_DESTROYED, watcher.life_cycle_state());
-}
-
-class DeleteCounter {
- public:
-  explicit DeleteCounter(int* deletes)
-      : deletes_(deletes) {
-  }
-
-  ~DeleteCounter() {
-    (*deletes_)++;
-  }
-
-  void VoidMethod0() {}
-
- private:
-  int* const deletes_;
-
-  DISALLOW_COPY_AND_ASSIGN(DeleteCounter);
-};
-
-template <typename T>
-ScopedVector<T> PassThru(ScopedVector<T> scoper) {
-  return scoper.Pass();
-}
-
-TEST(ScopedVectorTest, Passed) {
-  int deletes = 0;
-  ScopedVector<DeleteCounter> deleter_vector;
-  deleter_vector.push_back(new DeleteCounter(&deletes));
-  EXPECT_EQ(0, deletes);
-  base::Callback<ScopedVector<DeleteCounter>(void)> callback =
-      base::Bind(&PassThru<DeleteCounter>, base::Passed(&deleter_vector));
-  EXPECT_EQ(0, deletes);
-  ScopedVector<DeleteCounter> result = callback.Run();
-  EXPECT_EQ(0, deletes);
-  result.clear();
-  EXPECT_EQ(1, deletes);
-};
-
-TEST(ScopedVectorTest, InsertRange) {
-  LifeCycleWatcher watchers[5];
-
-  std::vector<LifeCycleObject*> vec;
-  for(LifeCycleWatcher* it = watchers; it != watchers + arraysize(watchers);
-      ++it) {
-    EXPECT_EQ(LC_INITIAL, it->life_cycle_state());
-    vec.push_back(it->NewLifeCycleObject());
-    EXPECT_EQ(LC_CONSTRUCTED, it->life_cycle_state());
-  }
-  // Start scope for ScopedVector.
-  {
-    ScopedVector<LifeCycleObject> scoped_vector;
-    scoped_vector.insert(scoped_vector.end(), vec.begin() + 1, vec.begin() + 3);
-    for(LifeCycleWatcher* it = watchers; it != watchers + arraysize(watchers);
-        ++it)
-      EXPECT_EQ(LC_CONSTRUCTED, it->life_cycle_state());
-  }
-  for(LifeCycleWatcher* it = watchers; it != watchers + 1; ++it)
-    EXPECT_EQ(LC_CONSTRUCTED, it->life_cycle_state());
-  for(LifeCycleWatcher* it = watchers + 1; it != watchers + 3; ++it)
-    EXPECT_EQ(LC_DESTROYED, it->life_cycle_state());
-  for(LifeCycleWatcher* it = watchers + 3; it != watchers + arraysize(watchers);
-      ++it)
-    EXPECT_EQ(LC_CONSTRUCTED, it->life_cycle_state());
-}
-
-// Assertions for push_back(scoped_ptr).
-TEST(ScopedVectorTest, PushBackScopedPtr) {
-  int delete_counter = 0;
-  scoped_ptr<DeleteCounter> elem(new DeleteCounter(&delete_counter));
-  EXPECT_EQ(0, delete_counter);
-  {
-    ScopedVector<DeleteCounter> v;
-    v.push_back(elem.Pass());
-    EXPECT_EQ(0, delete_counter);
-  }
-  EXPECT_EQ(1, delete_counter);
-}
-
-}  // namespace