1// Copyright 2003, Google Inc.
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3//
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9// notice, this list of conditions and the following disclaimer.
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17//
18// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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24// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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27// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29//
30// Authors: Dan Egnor (egnor@google.com)
31// Ported to Windows: Vadim Berman (vadimb@google.com)
32
33#include "gtest/internal/gtest-linked_ptr.h"
34
35#include <stdlib.h>
36#include "gtest/gtest.h"
37
38namespace {
39
40using testing::Message;
41using testing::internal::linked_ptr;
42
43int num;
44Message* history = NULL;
45
46// Class which tracks allocation/deallocation
47class A {
48 public:
49  A(): mynum(num++) { *history << "A" << mynum << " ctor\n"; }
50  virtual ~A() { *history << "A" << mynum << " dtor\n"; }
51  virtual void Use() { *history << "A" << mynum << " use\n"; }
52 protected:
53  int mynum;
54};
55
56// Subclass
57class B : public A {
58 public:
59  B() { *history << "B" << mynum << " ctor\n"; }
60  ~B() { *history << "B" << mynum << " dtor\n"; }
61  virtual void Use() { *history << "B" << mynum << " use\n"; }
62};
63
64class LinkedPtrTest : public testing::Test {
65 public:
66  LinkedPtrTest() {
67    num = 0;
68    history = new Message;
69  }
70
71  virtual ~LinkedPtrTest() {
72    delete history;
73    history = NULL;
74  }
75};
76
77TEST_F(LinkedPtrTest, GeneralTest) {
78  {
79    linked_ptr<A> a0, a1, a2;
80    // Use explicit function call notation here to suppress self-assign warning.
81    a0.operator=(a0);
82    a1 = a2;
83    ASSERT_EQ(a0.get(), static_cast<A*>(NULL));
84    ASSERT_EQ(a1.get(), static_cast<A*>(NULL));
85    ASSERT_EQ(a2.get(), static_cast<A*>(NULL));
86    ASSERT_TRUE(a0 == NULL);
87    ASSERT_TRUE(a1 == NULL);
88    ASSERT_TRUE(a2 == NULL);
89
90    {
91      linked_ptr<A> a3(new A);
92      a0 = a3;
93      ASSERT_TRUE(a0 == a3);
94      ASSERT_TRUE(a0 != NULL);
95      ASSERT_TRUE(a0.get() == a3);
96      ASSERT_TRUE(a0 == a3.get());
97      linked_ptr<A> a4(a0);
98      a1 = a4;
99      linked_ptr<A> a5(new A);
100      ASSERT_TRUE(a5.get() != a3);
101      ASSERT_TRUE(a5 != a3.get());
102      a2 = a5;
103      linked_ptr<B> b0(new B);
104      linked_ptr<A> a6(b0);
105      ASSERT_TRUE(b0 == a6);
106      ASSERT_TRUE(a6 == b0);
107      ASSERT_TRUE(b0 != NULL);
108      a5 = b0;
109      a5 = b0;
110      a3->Use();
111      a4->Use();
112      a5->Use();
113      a6->Use();
114      b0->Use();
115      (*b0).Use();
116      b0.get()->Use();
117    }
118
119    a0->Use();
120    a1->Use();
121    a2->Use();
122
123    a1 = a2;
124    a2.reset(new A);
125    a0.reset();
126
127    linked_ptr<A> a7;
128  }
129
130  ASSERT_STREQ(
131    "A0 ctor\n"
132    "A1 ctor\n"
133    "A2 ctor\n"
134    "B2 ctor\n"
135    "A0 use\n"
136    "A0 use\n"
137    "B2 use\n"
138    "B2 use\n"
139    "B2 use\n"
140    "B2 use\n"
141    "B2 use\n"
142    "B2 dtor\n"
143    "A2 dtor\n"
144    "A0 use\n"
145    "A0 use\n"
146    "A1 use\n"
147    "A3 ctor\n"
148    "A0 dtor\n"
149    "A3 dtor\n"
150    "A1 dtor\n",
151    history->GetString().c_str());
152}
153
154}  // Unnamed namespace
155