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// Copyright (c) 2011 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 <string>
#include "base/memory/linked_ptr.h"
#include "base/stringprintf.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace {
int num = 0;
std::string history;
// Class which tracks allocation/deallocation
struct A {
A(): mynum(num++) { history += base::StringPrintf("A%d ctor\n", mynum); }
virtual ~A() { history += base::StringPrintf("A%d dtor\n", mynum); }
virtual void Use() { history += base::StringPrintf("A%d use\n", mynum); }
int mynum;
};
// Subclass
struct B: public A {
B() { history += base::StringPrintf("B%d ctor\n", mynum); }
~B() { history += base::StringPrintf("B%d dtor\n", mynum); }
virtual void Use() { history += base::StringPrintf("B%d use\n", mynum); }
};
} // namespace
TEST(LinkedPtrTest, Test) {
{
linked_ptr<A> a0, a1, a2;
a0 = a0;
a1 = a2;
ASSERT_EQ(a0.get(), static_cast<A*>(NULL));
ASSERT_EQ(a1.get(), static_cast<A*>(NULL));
ASSERT_EQ(a2.get(), static_cast<A*>(NULL));
ASSERT_TRUE(a0 == NULL);
ASSERT_TRUE(a1 == NULL);
ASSERT_TRUE(a2 == NULL);
{
linked_ptr<A> a3(new A);
a0 = a3;
ASSERT_TRUE(a0 == a3);
ASSERT_TRUE(a0 != NULL);
ASSERT_TRUE(a0.get() == a3);
ASSERT_TRUE(a0 == a3.get());
linked_ptr<A> a4(a0);
a1 = a4;
linked_ptr<A> a5(new A);
ASSERT_TRUE(a5.get() != a3);
ASSERT_TRUE(a5 != a3.get());
a2 = a5;
linked_ptr<B> b0(new B);
linked_ptr<A> a6(b0);
ASSERT_TRUE(b0 == a6);
ASSERT_TRUE(a6 == b0);
ASSERT_TRUE(b0 != NULL);
a5 = b0;
a5 = b0;
a3->Use();
a4->Use();
a5->Use();
a6->Use();
b0->Use();
(*b0).Use();
b0.get()->Use();
}
a0->Use();
a1->Use();
a2->Use();
a1 = a2;
a2.reset(new A);
a0.reset();
linked_ptr<A> a7;
}
ASSERT_EQ(history,
"A0 ctor\n"
"A1 ctor\n"
"A2 ctor\n"
"B2 ctor\n"
"A0 use\n"
"A0 use\n"
"B2 use\n"
"B2 use\n"
"B2 use\n"
"B2 use\n"
"B2 use\n"
"B2 dtor\n"
"A2 dtor\n"
"A0 use\n"
"A0 use\n"
"A1 use\n"
"A3 ctor\n"
"A0 dtor\n"
"A3 dtor\n"
"A1 dtor\n"
);
}
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