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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 |override| for |virtual ~ScopedRefPtrCountDerived|. Created 5 years, 8 months ago
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« base/memory/ref_counted.h ('K') | « base/memory/ref_counted.h ('k') | base/move.h » ('j') | no next file with comments »
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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..f38fc2c6369958468efb8973b8d21fd817231ca2 100644
--- a/base/memory/ref_counted_unittest.cc
+++ b/base/memory/ref_counted_unittest.cc
@@ -53,6 +53,58 @@ class ScopedRefPtrToSelf : public base::RefCounted<ScopedRefPtrToSelf> {
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:
+ virtual ~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) {
@@ -113,3 +165,284 @@ 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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