gtest-linked_ptr_test.cc revision fc2de66453b0669c09eaca643b07d34443858b6f 
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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