1 /*
2  * Copyright 2017 Google Inc.
3  *
4  * Use of this source code is governed by a BSD-style license that can be
5  * found in the LICENSE file.
6  */
7 
8 #include "SkMakeUnique.h"
9 #include "SkVptr.h"
10 #include "Test.h"
11 
12 namespace {
13 
14     struct Base {
15         virtual ~Base() = default;
16         virtual size_t val() const = 0;
17     };
18 
19     struct SubclassA : public Base {
20         SubclassA(size_t val) : fVal(val) {}
21 
22         size_t val() const override { return fVal; }
23 
24         size_t fVal;
25     };
26 
27     struct SubclassB : public Base {
28         SubclassB() {}
29 
30         size_t val() const override { return 42; }
31     };
32 
33 }
34 
35 DEF_TEST(Vptr, r) {
36     std::unique_ptr<Base> a = skstd::make_unique<SubclassA>(21),
37                           b = skstd::make_unique<SubclassB>(),
38                           c = skstd::make_unique<SubclassA>(22),
39                           d = skstd::make_unique<SubclassB>();
40 
41     // These 4 objects all have unique identities.
42     REPORTER_ASSERT(r, a != b);
43     REPORTER_ASSERT(r, a != c);
44     REPORTER_ASSERT(r, a != d);
45     REPORTER_ASSERT(r, b != c);
46     REPORTER_ASSERT(r, b != d);
47     REPORTER_ASSERT(r, c != d);
48 
49     // Only b and d have the same val().
50     REPORTER_ASSERT(r, a->val() != b->val());
51     REPORTER_ASSERT(r, a->val() != c->val());
52     REPORTER_ASSERT(r, a->val() != d->val());
53     REPORTER_ASSERT(r, b->val() != c->val());
54     REPORTER_ASSERT(r, b->val() == d->val());
55     REPORTER_ASSERT(r, c->val() != d->val());
56 
57     // SkVptr() returns the same value for objects of the same concrete type.
58     REPORTER_ASSERT(r, SkVptr(*a) == SkVptr(*c));
59     REPORTER_ASSERT(r, SkVptr(*b) == SkVptr(*d));
60     REPORTER_ASSERT(r, SkVptr(*a) != SkVptr(*b));
61 }
62