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b6b04a7b | 1 | /* Unit tests for unique-ptr.h. |
fbd26352 | 2 | Copyright (C) 2017-2019 Free Software Foundation, Inc. |
b6b04a7b | 3 | |
4 | This file is part of GCC. | |
5 | ||
6 | GCC is free software; you can redistribute it and/or modify it under | |
7 | the terms of the GNU General Public License as published by the Free | |
8 | Software Foundation; either version 3, or (at your option) any later | |
9 | version. | |
10 | ||
11 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
12 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
14 | for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GCC; see the file COPYING3. If not see | |
18 | <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include "config.h" | |
95f39a98 | 21 | #define INCLUDE_UNIQUE_PTR |
b6b04a7b | 22 | #include "system.h" |
23 | #include "coretypes.h" | |
b6b04a7b | 24 | #include "selftest.h" |
25 | ||
26 | #if CHECKING_P | |
27 | ||
28 | namespace selftest { | |
29 | ||
30 | namespace { | |
31 | ||
32 | /* A class for counting ctor and dtor invocations. */ | |
33 | ||
34 | struct stats | |
35 | { | |
36 | stats () : ctor_count (0), dtor_count (0) {} | |
37 | ||
38 | int ctor_count; | |
39 | int dtor_count; | |
40 | }; | |
41 | ||
42 | /* A class that uses "stats" to track its ctor and dtor invocations. */ | |
43 | ||
44 | class foo | |
45 | { | |
46 | public: | |
47 | foo (stats &s) : m_s (s) { ++m_s.ctor_count; } | |
48 | ~foo () { ++m_s.dtor_count; } | |
49 | ||
50 | int example_method () const { return 42; } | |
51 | ||
52 | private: | |
53 | foo (const foo&); | |
54 | foo & operator= (const foo &); | |
55 | ||
56 | private: | |
57 | stats &m_s; | |
58 | }; | |
59 | ||
60 | /* A struct for testing unique_ptr<T[]>. */ | |
61 | ||
62 | struct has_default_ctor | |
63 | { | |
64 | has_default_ctor () : m_field (42) {} | |
65 | int m_field; | |
66 | }; | |
67 | ||
68 | /* A dummy struct for testing unique_xmalloc_ptr. */ | |
69 | ||
70 | struct dummy | |
71 | { | |
72 | int field; | |
73 | }; | |
74 | ||
75 | } // anonymous namespace | |
76 | ||
77 | /* Verify that the default ctor inits ptrs to NULL. */ | |
78 | ||
79 | static void | |
80 | test_null_ptr () | |
81 | { | |
82 | gnu::unique_ptr<void *> p; | |
83 | ASSERT_EQ (NULL, p); | |
84 | ||
85 | gnu::unique_xmalloc_ptr<void *> q; | |
86 | ASSERT_EQ (NULL, q); | |
87 | } | |
88 | ||
89 | /* Verify that deletion happens when a unique_ptr goes out of scope. */ | |
90 | ||
91 | static void | |
92 | test_implicit_deletion () | |
93 | { | |
94 | stats s; | |
95 | ASSERT_EQ (0, s.ctor_count); | |
96 | ASSERT_EQ (0, s.dtor_count); | |
97 | ||
98 | { | |
99 | gnu::unique_ptr<foo> f (new foo (s)); | |
100 | ASSERT_NE (NULL, f); | |
101 | ASSERT_EQ (1, s.ctor_count); | |
102 | ASSERT_EQ (0, s.dtor_count); | |
103 | } | |
104 | ||
105 | /* Verify that the foo was implicitly deleted. */ | |
106 | ASSERT_EQ (1, s.ctor_count); | |
107 | ASSERT_EQ (1, s.dtor_count); | |
108 | } | |
109 | ||
110 | /* Verify that we can assign to a NULL unique_ptr. */ | |
111 | ||
112 | static void | |
113 | test_overwrite_of_null () | |
114 | { | |
115 | stats s; | |
116 | ASSERT_EQ (0, s.ctor_count); | |
117 | ASSERT_EQ (0, s.dtor_count); | |
118 | ||
119 | { | |
120 | gnu::unique_ptr<foo> f; | |
121 | ASSERT_EQ (NULL, f); | |
122 | ASSERT_EQ (0, s.ctor_count); | |
123 | ASSERT_EQ (0, s.dtor_count); | |
124 | ||
125 | /* Overwrite with a non-NULL value. */ | |
126 | f = gnu::unique_ptr<foo> (new foo (s)); | |
127 | ASSERT_EQ (1, s.ctor_count); | |
128 | ASSERT_EQ (0, s.dtor_count); | |
129 | } | |
130 | ||
131 | /* Verify that the foo is implicitly deleted. */ | |
132 | ASSERT_EQ (1, s.ctor_count); | |
133 | ASSERT_EQ (1, s.dtor_count); | |
134 | } | |
135 | ||
136 | /* Verify that we can assign to a non-NULL unique_ptr. */ | |
137 | ||
138 | static void | |
139 | test_overwrite_of_non_null () | |
140 | { | |
141 | stats s; | |
142 | ASSERT_EQ (0, s.ctor_count); | |
143 | ASSERT_EQ (0, s.dtor_count); | |
144 | ||
145 | { | |
146 | gnu::unique_ptr<foo> f (new foo (s)); | |
147 | ASSERT_NE (NULL, f); | |
148 | ASSERT_EQ (1, s.ctor_count); | |
149 | ASSERT_EQ (0, s.dtor_count); | |
150 | ||
151 | /* Overwrite with a different value. */ | |
152 | f = gnu::unique_ptr<foo> (new foo (s)); | |
153 | ASSERT_EQ (2, s.ctor_count); | |
154 | ASSERT_EQ (1, s.dtor_count); | |
155 | } | |
156 | ||
157 | /* Verify that the 2nd foo was implicitly deleted. */ | |
158 | ASSERT_EQ (2, s.ctor_count); | |
159 | ASSERT_EQ (2, s.dtor_count); | |
160 | } | |
161 | ||
162 | /* Verify that unique_ptr's overloaded ops work. */ | |
163 | ||
164 | static void | |
165 | test_overloaded_ops () | |
166 | { | |
167 | stats s; | |
168 | gnu::unique_ptr<foo> f (new foo (s)); | |
169 | ASSERT_EQ (42, f->example_method ()); | |
170 | ASSERT_EQ (42, (*f).example_method ()); | |
171 | ASSERT_EQ (f, f); | |
172 | ASSERT_NE (NULL, f.get ()); | |
173 | ||
174 | gnu::unique_ptr<foo> g (new foo (s)); | |
175 | ASSERT_NE (f, g); | |
176 | } | |
177 | ||
178 | /* Verify that the gnu::unique_ptr specialization for T[] works. */ | |
179 | ||
180 | static void | |
181 | test_array_new () | |
182 | { | |
183 | const int num = 10; | |
184 | gnu::unique_ptr<has_default_ctor[]> p (new has_default_ctor[num]); | |
185 | ASSERT_NE (NULL, p.get ()); | |
186 | /* Verify that operator[] works, and that the default ctor was called | |
187 | on each element. */ | |
188 | for (int i = 0; i < num; i++) | |
189 | ASSERT_EQ (42, p[i].m_field); | |
190 | } | |
191 | ||
192 | /* Verify that gnu::unique_xmalloc_ptr works. */ | |
193 | ||
194 | static void | |
195 | test_xmalloc () | |
196 | { | |
197 | gnu::unique_xmalloc_ptr<dummy> p (XNEW (dummy)); | |
198 | ASSERT_NE (NULL, p.get ()); | |
199 | } | |
200 | ||
201 | /* Verify the gnu::unique_xmalloc_ptr specialization for T[]. */ | |
202 | ||
203 | static void | |
204 | test_xmalloc_array () | |
205 | { | |
206 | const int num = 10; | |
207 | gnu::unique_xmalloc_ptr<dummy[]> p (XNEWVEC (dummy, num)); | |
208 | ASSERT_NE (NULL, p.get ()); | |
209 | ||
210 | /* Verify that operator[] works. */ | |
211 | for (int i = 0; i < num; i++) | |
212 | p[i].field = 42; | |
213 | for (int i = 0; i < num; i++) | |
214 | ASSERT_EQ (42, p[i].field); | |
215 | } | |
216 | ||
217 | /* Run all of the selftests within this file. */ | |
218 | ||
219 | void | |
220 | unique_ptr_tests_cc_tests () | |
221 | { | |
222 | test_null_ptr (); | |
223 | test_implicit_deletion (); | |
224 | test_overwrite_of_null (); | |
225 | test_overwrite_of_non_null (); | |
226 | test_overloaded_ops (); | |
227 | test_array_new (); | |
228 | test_xmalloc (); | |
229 | test_xmalloc_array (); | |
230 | } | |
231 | ||
232 | } // namespace selftest | |
233 | ||
234 | #endif /* #if CHECKING_P */ |