base/win/scoped_comptr_unittest.cc

   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 "base/win/scoped_com_initializer.h"
  11 #include "testing/gtest/include/gtest/gtest.h"
  12
  13 namespace base {
  14 namespace win {
  15
  16 namespace {
  17
  18 struct Dummy {
  19   Dummy() : adds(0), releases(0) { }
  20   void AddRef() { ++adds; }
  21   void Release() { ++releases; }
  22
  23   int adds;
  24   int releases;
  25 };
  26
  27 extern const IID dummy_iid;
  28 const IID dummy_iid = {0x12345678u,
  29                        0x1234u,
  30                        0x5678u,
  31                        {01, 23, 45, 67, 89, 01, 23, 45}};
  32
  33 }  // namespace
  34
  35 TEST(ScopedComPtrTest, ScopedComPtr) {
  36   EXPECT_EQ(memcmp(&ScopedComPtr<IUnknown>::iid(), &IID_IUnknown, sizeof(IID)),
  37             0);
  38
  39   base::win::ScopedCOMInitializer com_initializer;
  40   EXPECT_TRUE(com_initializer.succeeded());
  41
  42   ScopedComPtr<IUnknown> unk;
  43   EXPECT_TRUE(SUCCEEDED(unk.CreateInstance(CLSID_ShellLink)));
  44   ScopedComPtr<IUnknown> unk2;
  45   unk2.Attach(unk.Detach());
  46   EXPECT_TRUE(unk.get() == NULL);
  47   EXPECT_TRUE(unk2.get() != NULL);
  48
  49   ScopedComPtr<IMalloc> mem_alloc;
  50   EXPECT_TRUE(SUCCEEDED(CoGetMalloc(1, mem_alloc.Receive())));
  51
  52   ScopedComPtr<IUnknown> qi_test;
  53   EXPECT_HRESULT_SUCCEEDED(mem_alloc.QueryInterface(IID_IUnknown,
  54       reinterpret_cast<void**>(qi_test.Receive())));
  55   EXPECT_TRUE(qi_test.get() != NULL);
  56   qi_test.Release();
  57
  58   // test ScopedComPtr& constructor
  59   ScopedComPtr<IMalloc> copy1(mem_alloc);
  60   EXPECT_TRUE(copy1.IsSameObject(mem_alloc.get()));
  61   EXPECT_FALSE(copy1.IsSameObject(unk2.get()));  // unk2 is valid but different
  62   EXPECT_FALSE(copy1.IsSameObject(unk.get()));  // unk is NULL
  63
  64   IMalloc* naked_copy = copy1.Detach();
  65   copy1 = naked_copy;  // Test the =(T*) operator.
  66   naked_copy->Release();
  67
  68   copy1.Release();
  69   EXPECT_FALSE(copy1.IsSameObject(unk2.get()));  // unk2 is valid, copy1 is not
  70
  71   // test Interface* constructor
  72   ScopedComPtr<IMalloc> copy2(static_cast<IMalloc*>(mem_alloc.get()));
  73   EXPECT_TRUE(copy2.IsSameObject(mem_alloc.get()));
  74
  75   EXPECT_TRUE(SUCCEEDED(unk.QueryFrom(mem_alloc.get())));
  76   EXPECT_TRUE(unk.get() != NULL);
  77   unk.Release();
  78   EXPECT_TRUE(unk.get() == NULL);
  79   EXPECT_TRUE(unk.IsSameObject(copy1.get()));  // both are NULL
  80 }
  81
  82 TEST(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].get(), 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