]>
Commit | Line | Data |
---|---|---|
1 | /* Unit tests for unique-ptr.h. | |
2 | Copyright (C) 2017-2020 Free Software Foundation, Inc. | |
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" | |
21 | #define INCLUDE_UNIQUE_PTR | |
22 | #include "system.h" | |
23 | #include "coretypes.h" | |
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 | class stats | |
35 | { | |
36 | public: | |
37 | stats () : ctor_count (0), dtor_count (0) {} | |
38 | ||
39 | int ctor_count; | |
40 | int dtor_count; | |
41 | }; | |
42 | ||
43 | /* A class that uses "stats" to track its ctor and dtor invocations. */ | |
44 | ||
45 | class foo | |
46 | { | |
47 | public: | |
48 | foo (stats &s) : m_s (s) { ++m_s.ctor_count; } | |
49 | ~foo () { ++m_s.dtor_count; } | |
50 | ||
51 | int example_method () const { return 42; } | |
52 | ||
53 | private: | |
54 | foo (const foo&); | |
55 | foo & operator= (const foo &); | |
56 | ||
57 | private: | |
58 | stats &m_s; | |
59 | }; | |
60 | ||
61 | /* A struct for testing unique_ptr<T[]>. */ | |
62 | ||
63 | class has_default_ctor | |
64 | { | |
65 | public: | |
66 | has_default_ctor () : m_field (42) {} | |
67 | int m_field; | |
68 | }; | |
69 | ||
70 | /* A dummy struct for testing unique_xmalloc_ptr. */ | |
71 | ||
72 | struct dummy | |
73 | { | |
74 | int field; | |
75 | }; | |
76 | ||
77 | } // anonymous namespace | |
78 | ||
79 | /* Verify that the default ctor inits ptrs to NULL. */ | |
80 | ||
81 | static void | |
82 | test_null_ptr () | |
83 | { | |
84 | gnu::unique_ptr<void *> p; | |
85 | ASSERT_EQ (NULL, p); | |
86 | ||
87 | gnu::unique_xmalloc_ptr<void *> q; | |
88 | ASSERT_EQ (NULL, q); | |
89 | } | |
90 | ||
91 | /* Verify that deletion happens when a unique_ptr goes out of scope. */ | |
92 | ||
93 | static void | |
94 | test_implicit_deletion () | |
95 | { | |
96 | stats s; | |
97 | ASSERT_EQ (0, s.ctor_count); | |
98 | ASSERT_EQ (0, s.dtor_count); | |
99 | ||
100 | { | |
101 | gnu::unique_ptr<foo> f (new foo (s)); | |
102 | ASSERT_NE (NULL, f); | |
103 | ASSERT_EQ (1, s.ctor_count); | |
104 | ASSERT_EQ (0, s.dtor_count); | |
105 | } | |
106 | ||
107 | /* Verify that the foo was implicitly deleted. */ | |
108 | ASSERT_EQ (1, s.ctor_count); | |
109 | ASSERT_EQ (1, s.dtor_count); | |
110 | } | |
111 | ||
112 | /* Verify that we can assign to a NULL unique_ptr. */ | |
113 | ||
114 | static void | |
115 | test_overwrite_of_null () | |
116 | { | |
117 | stats s; | |
118 | ASSERT_EQ (0, s.ctor_count); | |
119 | ASSERT_EQ (0, s.dtor_count); | |
120 | ||
121 | { | |
122 | gnu::unique_ptr<foo> f; | |
123 | ASSERT_EQ (NULL, f); | |
124 | ASSERT_EQ (0, s.ctor_count); | |
125 | ASSERT_EQ (0, s.dtor_count); | |
126 | ||
127 | /* Overwrite with a non-NULL value. */ | |
128 | f = gnu::unique_ptr<foo> (new foo (s)); | |
129 | ASSERT_EQ (1, s.ctor_count); | |
130 | ASSERT_EQ (0, s.dtor_count); | |
131 | } | |
132 | ||
133 | /* Verify that the foo is implicitly deleted. */ | |
134 | ASSERT_EQ (1, s.ctor_count); | |
135 | ASSERT_EQ (1, s.dtor_count); | |
136 | } | |
137 | ||
138 | /* Verify that we can assign to a non-NULL unique_ptr. */ | |
139 | ||
140 | static void | |
141 | test_overwrite_of_non_null () | |
142 | { | |
143 | stats s; | |
144 | ASSERT_EQ (0, s.ctor_count); | |
145 | ASSERT_EQ (0, s.dtor_count); | |
146 | ||
147 | { | |
148 | gnu::unique_ptr<foo> f (new foo (s)); | |
149 | ASSERT_NE (NULL, f); | |
150 | ASSERT_EQ (1, s.ctor_count); | |
151 | ASSERT_EQ (0, s.dtor_count); | |
152 | ||
153 | /* Overwrite with a different value. */ | |
154 | f = gnu::unique_ptr<foo> (new foo (s)); | |
155 | ASSERT_EQ (2, s.ctor_count); | |
156 | ASSERT_EQ (1, s.dtor_count); | |
157 | } | |
158 | ||
159 | /* Verify that the 2nd foo was implicitly deleted. */ | |
160 | ASSERT_EQ (2, s.ctor_count); | |
161 | ASSERT_EQ (2, s.dtor_count); | |
162 | } | |
163 | ||
164 | /* Verify that unique_ptr's overloaded ops work. */ | |
165 | ||
166 | static void | |
167 | test_overloaded_ops () | |
168 | { | |
169 | stats s; | |
170 | gnu::unique_ptr<foo> f (new foo (s)); | |
171 | ASSERT_EQ (42, f->example_method ()); | |
172 | ASSERT_EQ (42, (*f).example_method ()); | |
173 | ASSERT_EQ (f, f); | |
174 | ASSERT_NE (NULL, f.get ()); | |
175 | ||
176 | gnu::unique_ptr<foo> g (new foo (s)); | |
177 | ASSERT_NE (f, g); | |
178 | } | |
179 | ||
180 | /* Verify that the gnu::unique_ptr specialization for T[] works. */ | |
181 | ||
182 | static void | |
183 | test_array_new () | |
184 | { | |
185 | const int num = 10; | |
186 | gnu::unique_ptr<has_default_ctor[]> p (new has_default_ctor[num]); | |
187 | ASSERT_NE (NULL, p.get ()); | |
188 | /* Verify that operator[] works, and that the default ctor was called | |
189 | on each element. */ | |
190 | for (int i = 0; i < num; i++) | |
191 | ASSERT_EQ (42, p[i].m_field); | |
192 | } | |
193 | ||
194 | /* Verify that gnu::unique_xmalloc_ptr works. */ | |
195 | ||
196 | static void | |
197 | test_xmalloc () | |
198 | { | |
199 | gnu::unique_xmalloc_ptr<dummy> p (XNEW (dummy)); | |
200 | ASSERT_NE (NULL, p.get ()); | |
201 | } | |
202 | ||
203 | /* Verify the gnu::unique_xmalloc_ptr specialization for T[]. */ | |
204 | ||
205 | static void | |
206 | test_xmalloc_array () | |
207 | { | |
208 | const int num = 10; | |
209 | gnu::unique_xmalloc_ptr<dummy[]> p (XNEWVEC (dummy, num)); | |
210 | ASSERT_NE (NULL, p.get ()); | |
211 | ||
212 | /* Verify that operator[] works. */ | |
213 | for (int i = 0; i < num; i++) | |
214 | p[i].field = 42; | |
215 | for (int i = 0; i < num; i++) | |
216 | ASSERT_EQ (42, p[i].field); | |
217 | } | |
218 | ||
219 | /* Run all of the selftests within this file. */ | |
220 | ||
221 | void | |
222 | unique_ptr_tests_cc_tests () | |
223 | { | |
224 | test_null_ptr (); | |
225 | test_implicit_deletion (); | |
226 | test_overwrite_of_null (); | |
227 | test_overwrite_of_non_null (); | |
228 | test_overloaded_ops (); | |
229 | test_array_new (); | |
230 | test_xmalloc (); | |
231 | test_xmalloc_array (); | |
232 | } | |
233 | ||
234 | } // namespace selftest | |
235 | ||
236 | #endif /* #if CHECKING_P */ |