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Unified Diff: base/memory/ref_counted_unittest.cc

Issue 1076953002: Add move support for scoped_refptr. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: add comment for check->self_ptr_ = scoped_refptr<ScopedRefPtrToSelf>(); test Created 5 years, 8 months ago
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Index: base/memory/ref_counted_unittest.cc
diff --git a/base/memory/ref_counted_unittest.cc b/base/memory/ref_counted_unittest.cc
index f75cd38f19c86d530237200e37792a2cde9480eb..6f8e599cbdc970728d4a035528f68a4eb69acd9c 100644
--- a/base/memory/ref_counted_unittest.cc
+++ b/base/memory/ref_counted_unittest.cc
@@ -40,19 +40,71 @@ class ScopedRefPtrToSelf : public base::RefCounted<ScopedRefPtrToSelf> {
static bool was_destroyed() { return was_destroyed_; }
- void SelfDestruct() { self_ptr_ = NULL; }
+ static void reset_was_destroyed() { was_destroyed_ = false; }
+
+ scoped_refptr<ScopedRefPtrToSelf> self_ptr_;
private:
friend class base::RefCounted<ScopedRefPtrToSelf>;
~ScopedRefPtrToSelf() { was_destroyed_ = true; }
static bool was_destroyed_;
-
- scoped_refptr<ScopedRefPtrToSelf> self_ptr_;
};
bool ScopedRefPtrToSelf::was_destroyed_ = false;
+class ScopedRefPtrCountBase : public base::RefCounted<ScopedRefPtrCountBase> {
+ public:
+ ScopedRefPtrCountBase() { ++constructor_count_; }
+
+ static int constructor_count() { return constructor_count_; }
+
+ static int destructor_count() { return destructor_count_; }
+
+ static void reset_count() {
+ constructor_count_ = 0;
+ destructor_count_ = 0;
+ }
+
+ protected:
+ virtual ~ScopedRefPtrCountBase() { ++destructor_count_; }
+
+ private:
+ friend class base::RefCounted<ScopedRefPtrCountBase>;
+
+ static int constructor_count_;
+ static int destructor_count_;
+};
+
+int ScopedRefPtrCountBase::constructor_count_ = 0;
+int ScopedRefPtrCountBase::destructor_count_ = 0;
+
+class ScopedRefPtrCountDerived : public ScopedRefPtrCountBase {
+ public:
+ ScopedRefPtrCountDerived() { ++constructor_count_; }
+
+ static int constructor_count() { return constructor_count_; }
+
+ static int destructor_count() { return destructor_count_; }
+
+ static void reset_count() {
+ constructor_count_ = 0;
+ destructor_count_ = 0;
+ }
+
+ protected:
+ ~ScopedRefPtrCountDerived() override { ++destructor_count_; }
+
+ private:
+ friend class base::RefCounted<ScopedRefPtrCountDerived>;
+
+ static int constructor_count_;
+ static int destructor_count_;
+};
+
+int ScopedRefPtrCountDerived::constructor_count_ = 0;
+int ScopedRefPtrCountDerived::destructor_count_ = 0;
+
} // end namespace
TEST(RefCountedUnitTest, TestSelfAssignment) {
@@ -66,10 +118,24 @@ TEST(RefCountedUnitTest, ScopedRefPtrMemberAccess) {
CheckDerivedMemberAccess check;
}
-TEST(RefCountedUnitTest, ScopedRefPtrToSelf) {
+TEST(RefCountedUnitTest, ScopedRefPtrToSelfPointerAssignment) {
+ ScopedRefPtrToSelf::reset_was_destroyed();
+
ScopedRefPtrToSelf* check = new ScopedRefPtrToSelf();
EXPECT_FALSE(ScopedRefPtrToSelf::was_destroyed());
- check->SelfDestruct();
+ check->self_ptr_ = nullptr;
+ EXPECT_TRUE(ScopedRefPtrToSelf::was_destroyed());
+}
+
+TEST(RefCountedUnitTest, ScopedRefPtrToSelfMoveAssignment) {
+ ScopedRefPtrToSelf::reset_was_destroyed();
+
+ ScopedRefPtrToSelf* check = new ScopedRefPtrToSelf();
+ EXPECT_FALSE(ScopedRefPtrToSelf::was_destroyed());
+ // Releasing |check->self_ptr_| will delete |check|.
+ // The move assignment operator must assign |check->self_ptr_| first then
+ // release |check->self_ptr_|.
+ check->self_ptr_ = scoped_refptr<ScopedRefPtrToSelf>();
EXPECT_TRUE(ScopedRefPtrToSelf::was_destroyed());
}
@@ -113,3 +179,284 @@ TEST(RefCountedUnitTest, ConvertibleEquality) {
EXPECT_EQ(p1, p2);
EXPECT_EQ(p2, p1);
}
+
+TEST(RefCountedUnitTest, SelfMoveAssignment) {
+ ScopedRefPtrCountBase::reset_count();
+
+ {
+ ScopedRefPtrCountBase *raw = new ScopedRefPtrCountBase();
+ scoped_refptr<ScopedRefPtrCountBase> p(raw);
+ EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
+ EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
+
+ p = p.Pass();
+ EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
+ EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
+ EXPECT_EQ(raw, p.get());
+
+ // p goes out of scope.
+ }
+ EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
+ EXPECT_EQ(1, ScopedRefPtrCountBase::destructor_count());
+}
+
+TEST(RefCountedUnitTest, MoveAssignment1) {
+ ScopedRefPtrCountBase::reset_count();
+
+ {
+ ScopedRefPtrCountBase *raw = new ScopedRefPtrCountBase();
+ scoped_refptr<ScopedRefPtrCountBase> p1(raw);
+ EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
+ EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
+
+ {
+ scoped_refptr<ScopedRefPtrCountBase> p2;
+
+ p2 = p1.Pass();
+ EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
+ EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
+ EXPECT_EQ(nullptr, p1.get());
+ EXPECT_EQ(raw, p2.get());
+
+ // p2 goes out of scope.
+ }
+ EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
+ EXPECT_EQ(1, ScopedRefPtrCountBase::destructor_count());
+
+ // p1 goes out of scope.
+ }
+ EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
+ EXPECT_EQ(1, ScopedRefPtrCountBase::destructor_count());
+}
+
+TEST(RefCountedUnitTest, MoveAssignment2) {
+ ScopedRefPtrCountBase::reset_count();
+
+ {
+ ScopedRefPtrCountBase *raw = new ScopedRefPtrCountBase();
+ scoped_refptr<ScopedRefPtrCountBase> p1;
+ EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
+ EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
+
+ {
+ scoped_refptr<ScopedRefPtrCountBase> p2(raw);
+ EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
+ EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
+
+ p1 = p2.Pass();
+ EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
+ EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
+ EXPECT_EQ(raw, p1.get());
+ EXPECT_EQ(nullptr, p2.get());
+
+ // p2 goes out of scope.
+ }
+ EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
+ EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
+
+ // p1 goes out of scope.
+ }
+ EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
+ EXPECT_EQ(1, ScopedRefPtrCountBase::destructor_count());
+}
+
+TEST(RefCountedUnitTest, MoveAssignmentSameInstance1) {
+ ScopedRefPtrCountBase::reset_count();
+
+ {
+ ScopedRefPtrCountBase *raw = new ScopedRefPtrCountBase();
+ scoped_refptr<ScopedRefPtrCountBase> p1(raw);
+ EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
+ EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
+
+ {
+ scoped_refptr<ScopedRefPtrCountBase> p2(p1);
+ EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
+ EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
+
+ p1 = p2.Pass();
+ EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
+ EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
+ EXPECT_EQ(raw, p1.get());
+ EXPECT_EQ(nullptr, p2.get());
+
+ // p2 goes out of scope.
+ }
+ EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
+ EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
+
+ // p1 goes out of scope.
+ }
+ EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
+ EXPECT_EQ(1, ScopedRefPtrCountBase::destructor_count());
+}
+
+TEST(RefCountedUnitTest, MoveAssignmentSameInstance2) {
+ ScopedRefPtrCountBase::reset_count();
+
+ {
+ ScopedRefPtrCountBase *raw = new ScopedRefPtrCountBase();
+ scoped_refptr<ScopedRefPtrCountBase> p1(raw);
+ EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
+ EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
+
+ {
+ scoped_refptr<ScopedRefPtrCountBase> p2(p1);
+ EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
+ EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
+
+ p2 = p1.Pass();
+ EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
+ EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
+ EXPECT_EQ(nullptr, p1.get());
+ EXPECT_EQ(raw, p2.get());
+
+ // p2 goes out of scope.
+ }
+ EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
+ EXPECT_EQ(1, ScopedRefPtrCountBase::destructor_count());
+
+ // p1 goes out of scope.
+ }
+ EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
+ EXPECT_EQ(1, ScopedRefPtrCountBase::destructor_count());
+}
+
+TEST(RefCountedUnitTest, MoveAssignmentDifferentInstances) {
+ ScopedRefPtrCountBase::reset_count();
+
+ {
+ ScopedRefPtrCountBase *raw1 = new ScopedRefPtrCountBase();
+ scoped_refptr<ScopedRefPtrCountBase> p1(raw1);
+ EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
+ EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
+
+ {
+ ScopedRefPtrCountBase *raw2 = new ScopedRefPtrCountBase();
+ scoped_refptr<ScopedRefPtrCountBase> p2(raw2);
+ EXPECT_EQ(2, ScopedRefPtrCountBase::constructor_count());
+ EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
+
+ p1 = p2.Pass();
+ EXPECT_EQ(2, ScopedRefPtrCountBase::constructor_count());
+ EXPECT_EQ(1, ScopedRefPtrCountBase::destructor_count());
+ EXPECT_EQ(raw2, p1.get());
+ EXPECT_EQ(nullptr, p2.get());
+
+ // p2 goes out of scope.
+ }
+ EXPECT_EQ(2, ScopedRefPtrCountBase::constructor_count());
+ EXPECT_EQ(1, ScopedRefPtrCountBase::destructor_count());
+
+ // p1 goes out of scope.
+ }
+ EXPECT_EQ(2, ScopedRefPtrCountBase::constructor_count());
+ EXPECT_EQ(2, ScopedRefPtrCountBase::destructor_count());
+}
+
+TEST(RefCountedUnitTest, MoveAssignmentDerived) {
+ ScopedRefPtrCountBase::reset_count();
+ ScopedRefPtrCountDerived::reset_count();
+
+ {
+ ScopedRefPtrCountBase *raw1 = new ScopedRefPtrCountBase();
+ scoped_refptr<ScopedRefPtrCountBase> p1(raw1);
+ EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
+ EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
+ EXPECT_EQ(0, ScopedRefPtrCountDerived::constructor_count());
+ EXPECT_EQ(0, ScopedRefPtrCountDerived::destructor_count());
+
+ {
+ ScopedRefPtrCountDerived *raw2 = new ScopedRefPtrCountDerived();
+ scoped_refptr<ScopedRefPtrCountDerived> p2(raw2);
+ EXPECT_EQ(2, ScopedRefPtrCountBase::constructor_count());
+ EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
+ EXPECT_EQ(1, ScopedRefPtrCountDerived::constructor_count());
+ EXPECT_EQ(0, ScopedRefPtrCountDerived::destructor_count());
+
+ p1 = p2.Pass();
+ EXPECT_EQ(2, ScopedRefPtrCountBase::constructor_count());
+ EXPECT_EQ(1, ScopedRefPtrCountBase::destructor_count());
+ EXPECT_EQ(1, ScopedRefPtrCountDerived::constructor_count());
+ EXPECT_EQ(0, ScopedRefPtrCountDerived::destructor_count());
+ EXPECT_EQ(raw2, p1.get());
+ EXPECT_EQ(nullptr, p2.get());
+
+ // p2 goes out of scope.
+ }
+ EXPECT_EQ(2, ScopedRefPtrCountBase::constructor_count());
+ EXPECT_EQ(1, ScopedRefPtrCountBase::destructor_count());
+ EXPECT_EQ(1, ScopedRefPtrCountDerived::constructor_count());
+ EXPECT_EQ(0, ScopedRefPtrCountDerived::destructor_count());
+
+ // p1 goes out of scope.
+ }
+ EXPECT_EQ(2, ScopedRefPtrCountBase::constructor_count());
+ EXPECT_EQ(2, ScopedRefPtrCountBase::destructor_count());
+ EXPECT_EQ(1, ScopedRefPtrCountDerived::constructor_count());
+ EXPECT_EQ(1, ScopedRefPtrCountDerived::destructor_count());
+}
+
+TEST(RefCountedUnitTest, MoveConstructor) {
+ ScopedRefPtrCountBase::reset_count();
+
+ {
+ ScopedRefPtrCountBase *raw = new ScopedRefPtrCountBase();
+ scoped_refptr<ScopedRefPtrCountBase> p1(raw);
+ EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
+ EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
+
+ {
+ scoped_refptr<ScopedRefPtrCountBase> p2(p1.Pass());
+ EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
+ EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
+ EXPECT_EQ(nullptr, p1.get());
+ EXPECT_EQ(raw, p2.get());
+
+ // p2 goes out of scope.
+ }
+ EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
+ EXPECT_EQ(1, ScopedRefPtrCountBase::destructor_count());
+
+ // p1 goes out of scope.
+ }
+ EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
+ EXPECT_EQ(1, ScopedRefPtrCountBase::destructor_count());
+}
+
+TEST(RefCountedUnitTest, MoveConstructorDerived) {
+ ScopedRefPtrCountBase::reset_count();
+ ScopedRefPtrCountDerived::reset_count();
+
+ {
+ ScopedRefPtrCountDerived *raw1 = new ScopedRefPtrCountDerived();
+ scoped_refptr<ScopedRefPtrCountDerived> p1(raw1);
+ EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
+ EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
+ EXPECT_EQ(1, ScopedRefPtrCountDerived::constructor_count());
+ EXPECT_EQ(0, ScopedRefPtrCountDerived::destructor_count());
+
+ {
+ scoped_refptr<ScopedRefPtrCountBase> p2(p1.Pass());
+ EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
+ EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
+ EXPECT_EQ(1, ScopedRefPtrCountDerived::constructor_count());
+ EXPECT_EQ(0, ScopedRefPtrCountDerived::destructor_count());
+ EXPECT_EQ(nullptr, p1.get());
+ EXPECT_EQ(raw1, p2.get());
+
+ // p2 goes out of scope.
+ }
+ EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
+ EXPECT_EQ(1, ScopedRefPtrCountBase::destructor_count());
+ EXPECT_EQ(1, ScopedRefPtrCountDerived::constructor_count());
+ EXPECT_EQ(1, ScopedRefPtrCountDerived::destructor_count());
+
+ // p1 goes out of scope.
+ }
+ EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
+ EXPECT_EQ(1, ScopedRefPtrCountBase::destructor_count());
+ EXPECT_EQ(1, ScopedRefPtrCountDerived::constructor_count());
+ EXPECT_EQ(1, ScopedRefPtrCountDerived::destructor_count());
+}
+
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