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      1 // Copyright 2003, Google Inc.
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      9 // notice, this list of conditions and the following disclaimer.
     10 //     * Redistributions in binary form must reproduce the above
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     21 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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     29 //
     30 // Authors: Dan Egnor (egnor (at) google.com)
     31 // Ported to Windows: Vadim Berman (vadimb (at) google.com)
     32 
     33 #include "gtest/internal/gtest-linked_ptr.h"
     34 
     35 #include <stdlib.h>
     36 #include "gtest/gtest.h"
     37 
     38 namespace {
     39 
     40 using testing::Message;
     41 using testing::internal::linked_ptr;
     42 
     43 int num;
     44 Message* history = NULL;
     45 
     46 // Class which tracks allocation/deallocation
     47 class 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
     57 class 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 
     64 class 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 
     77 TEST_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