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// Copyright 2013 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/basictypes.h"
#include "base/bind.h"
#include "base/ios/weak_nsobject.h"
#include "base/mac/scoped_nsobject.h"
#include "base/message_loop/message_loop.h"
#include "base/single_thread_task_runner.h"
#include "base/threading/thread.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace base {
namespace {
TEST(WeakNSObjectTest, WeakNSObject) {
scoped_nsobject<NSObject> p1([[NSObject alloc] init]);
WeakNSObject<NSObject> w1(p1);
EXPECT_TRUE(w1);
p1.reset();
EXPECT_FALSE(w1);
}
TEST(WeakNSObjectTest, MultipleWeakNSObject) {
scoped_nsobject<NSObject> p1([[NSObject alloc] init]);
WeakNSObject<NSObject> w1(p1);
WeakNSObject<NSObject> w2(w1);
EXPECT_TRUE(w1);
EXPECT_TRUE(w2);
EXPECT_TRUE(w1.get() == w2.get());
p1.reset();
EXPECT_FALSE(w1);
EXPECT_FALSE(w2);
}
TEST(WeakNSObjectTest, WeakNSObjectDies) {
scoped_nsobject<NSObject> p1([[NSObject alloc] init]);
{
WeakNSObject<NSObject> w1(p1);
EXPECT_TRUE(w1);
}
}
TEST(WeakNSObjectTest, WeakNSObjectReset) {
scoped_nsobject<NSObject> p1([[NSObject alloc] init]);
WeakNSObject<NSObject> w1(p1);
EXPECT_TRUE(w1);
w1.reset();
EXPECT_FALSE(w1);
EXPECT_TRUE(p1);
EXPECT_TRUE([p1 description]);
}
TEST(WeakNSObjectTest, WeakNSObjectResetWithObject) {
scoped_nsobject<NSObject> p1([[NSObject alloc] init]);
scoped_nsobject<NSObject> p2([[NSObject alloc] init]);
WeakNSObject<NSObject> w1(p1);
EXPECT_TRUE(w1);
w1.reset(p2);
EXPECT_TRUE(w1);
EXPECT_TRUE([p1 description]);
EXPECT_TRUE([p2 description]);
}
TEST(WeakNSObjectTest, WeakNSObjectEmpty) {
scoped_nsobject<NSObject> p1([[NSObject alloc] init]);
WeakNSObject<NSObject> w1;
EXPECT_FALSE(w1);
w1.reset(p1);
EXPECT_TRUE(w1);
p1.reset();
EXPECT_FALSE(w1);
}
TEST(WeakNSObjectTest, WeakNSObjectCopy) {
scoped_nsobject<NSObject> p1([[NSObject alloc] init]);
WeakNSObject<NSObject> w1(p1);
WeakNSObject<NSObject> w2(w1);
EXPECT_TRUE(w1);
EXPECT_TRUE(w2);
p1.reset();
EXPECT_FALSE(w1);
EXPECT_FALSE(w2);
}
TEST(WeakNSObjectTest, WeakNSObjectAssignment) {
scoped_nsobject<NSObject> p1([[NSObject alloc] init]);
WeakNSObject<NSObject> w1(p1);
WeakNSObject<NSObject> w2;
EXPECT_FALSE(w2);
w2 = w1;
EXPECT_TRUE(w1);
EXPECT_TRUE(w2);
p1.reset();
EXPECT_FALSE(w1);
EXPECT_FALSE(w2);
}
// Touches |weak_data| by increasing its length by 1. Used to check that the
// weak object can be dereferenced.
void TouchWeakData(const WeakNSObject<NSMutableData>& weak_data) {
if (!weak_data)
return;
[weak_data increaseLengthBy:1];
}
// Makes a copy of |weak_object| on the current thread and posts a task to touch
// the weak object on its original thread.
void CopyWeakNSObjectAndPost(const WeakNSObject<NSMutableData>& weak_object,
scoped_refptr<SingleThreadTaskRunner> runner) {
// Copy using constructor.
WeakNSObject<NSMutableData> weak_copy1(weak_object);
runner->PostTask(FROM_HERE, Bind(&TouchWeakData, weak_copy1));
// Copy using assignment operator.
WeakNSObject<NSMutableData> weak_copy2 = weak_object;
runner->PostTask(FROM_HERE, Bind(&TouchWeakData, weak_copy2));
}
// Tests that the weak object can be copied on a different thread.
TEST(WeakNSObjectTest, WeakNSObjectCopyOnOtherThread) {
MessageLoop loop;
Thread other_thread("WeakNSObjectCopyOnOtherThread");
other_thread.Start();
scoped_nsobject<NSMutableData> data([[NSMutableData alloc] init]);
WeakNSObject<NSMutableData> weak(data);
scoped_refptr<SingleThreadTaskRunner> runner = loop.task_runner();
other_thread.task_runner()->PostTask(
FROM_HERE, Bind(&CopyWeakNSObjectAndPost, weak, runner));
other_thread.Stop();
loop.RunUntilIdle();
// Check that TouchWeakData was called and the object touched twice.
EXPECT_EQ(2u, [data length]);
}
} // namespace
} // namespace base
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