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- // 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 <string>
- #include "butil/memory/linked_ptr.h"
- #include "butil/strings/stringprintf.h"
- #include <gtest/gtest.h>
- namespace {
- int num = 0;
- std::string history;
- // Class which tracks allocation/deallocation
- struct A {
- A(): mynum(num++) { history += butil::StringPrintf("A%d ctor\n", mynum); }
- virtual ~A() { history += butil::StringPrintf("A%d dtor\n", mynum); }
- virtual void Use() { history += butil::StringPrintf("A%d use\n", mynum); }
- int mynum;
- };
- // Subclass
- struct B: public A {
- B() { history += butil::StringPrintf("B%d ctor\n", mynum); }
- virtual ~B() { history += butil::StringPrintf("B%d dtor\n", mynum); }
- virtual void Use() OVERRIDE {
- history += butil::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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