scoped_comptr_unittest.cc revision ddb351dbec246cf1fab5ec20d2d5520909041de1 
1// Copyright (c) 2011 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "base/win/scoped_comptr.h"
6
7#include <shlobj.h>
8
9#include "base/memory/scoped_ptr.h"
10#include "testing/gtest/include/gtest/gtest.h"
11
12namespace base {
13namespace win {
14
15namespace {
16
17struct Dummy {
18  Dummy() : adds(0), releases(0) { }
19  void AddRef() { ++adds; }
20  void Release() { ++releases; }
21
22  int adds;
23  int releases;
24};
25
26extern const IID dummy_iid;
27const IID dummy_iid = { 0x12345678u, 0x1234u, 0x5678u, 01, 23, 45, 67, 89,
28                        01, 23, 45 };
29
30}  // namespace
31
32TEST(ScopedComPtrTest, ScopedComPtr) {
33  EXPECT_TRUE(memcmp(&ScopedComPtr<IUnknown>::iid(), &IID_IUnknown,
34                     sizeof(IID)) == 0);
35
36  EXPECT_TRUE(SUCCEEDED(::CoInitialize(NULL)));
37
38  {
39    ScopedComPtr<IUnknown> unk;
40    EXPECT_TRUE(SUCCEEDED(unk.CreateInstance(CLSID_ShellLink)));
41    ScopedComPtr<IUnknown> unk2;
42    unk2.Attach(unk.Detach());
43    EXPECT_TRUE(unk == NULL);
44    EXPECT_TRUE(unk2 != NULL);
45
46    ScopedComPtr<IMalloc> mem_alloc;
47    EXPECT_TRUE(SUCCEEDED(CoGetMalloc(1, mem_alloc.Receive())));
48
49    ScopedComPtr<IUnknown> qi_test;
50    EXPECT_HRESULT_SUCCEEDED(mem_alloc.QueryInterface(IID_IUnknown,
51        reinterpret_cast<void**>(qi_test.Receive())));
52    EXPECT_TRUE(qi_test.get() != NULL);
53    qi_test.Release();
54
55    // test ScopedComPtr& constructor
56    ScopedComPtr<IMalloc> copy1(mem_alloc);
57    EXPECT_TRUE(copy1.IsSameObject(mem_alloc));
58    EXPECT_FALSE(copy1.IsSameObject(unk2));  // unk2 is valid but different
59    EXPECT_FALSE(copy1.IsSameObject(unk));  // unk is NULL
60
61    IMalloc* naked_copy = copy1.Detach();
62    copy1 = naked_copy;  // Test the =(T*) operator.
63    naked_copy->Release();
64
65    copy1.Release();
66    EXPECT_FALSE(copy1.IsSameObject(unk2));  // unk2 is valid, copy1 is not
67
68    // test Interface* constructor
69    ScopedComPtr<IMalloc> copy2(static_cast<IMalloc*>(mem_alloc));
70    EXPECT_TRUE(copy2.IsSameObject(mem_alloc));
71
72    EXPECT_TRUE(SUCCEEDED(unk.QueryFrom(mem_alloc)));
73    EXPECT_TRUE(unk != NULL);
74    unk.Release();
75    EXPECT_TRUE(unk == NULL);
76    EXPECT_TRUE(unk.IsSameObject(copy1));  // both are NULL
77  }
78
79  ::CoUninitialize();
80}
81
82TEST(ScopedComPtrTest, ScopedComPtrVector) {
83  // Verify we don't get error C2558.
84  typedef ScopedComPtr<Dummy, &dummy_iid> Ptr;
85  std::vector<Ptr> bleh;
86
87  scoped_ptr<Dummy> p(new Dummy);
88  {
89    Ptr p2(p.get());
90    EXPECT_EQ(p->adds, 1);
91    EXPECT_EQ(p->releases, 0);
92    Ptr p3 = p2;
93    EXPECT_EQ(p->adds, 2);
94    EXPECT_EQ(p->releases, 0);
95    p3 = p2;
96    EXPECT_EQ(p->adds, 3);
97    EXPECT_EQ(p->releases, 1);
98    // To avoid hitting a reallocation.
99    bleh.reserve(1);
100    bleh.push_back(p2);
101    EXPECT_EQ(p->adds, 4);
102    EXPECT_EQ(p->releases, 1);
103    EXPECT_EQ(bleh[0], p.get());
104    bleh.pop_back();
105    EXPECT_EQ(p->adds, 4);
106    EXPECT_EQ(p->releases, 2);
107  }
108  EXPECT_EQ(p->adds, 4);
109  EXPECT_EQ(p->releases, 4);
110}
111
112}  // namespace win
113}  // namespace base
114