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76727919 TT |
1 | /* Self tests for gdb::observers, GDB notifications to observers. |
2 | ||
b811d2c2 | 3 | Copyright (C) 2003-2020 Free Software Foundation, Inc. |
76727919 TT |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include "defs.h" | |
268a13a5 TT |
21 | #include "gdbsupport/selftest.h" |
22 | #include "gdbsupport/observable.h" | |
76727919 TT |
23 | |
24 | namespace selftests { | |
25 | namespace observers { | |
26 | ||
27 | gdb::observers::observable<int> test_notification ("test_notification"); | |
28 | ||
29 | static int test_first_observer = 0; | |
30 | static int test_second_observer = 0; | |
31 | static int test_third_observer = 0; | |
32 | ||
33 | static void | |
34 | test_first_notification_function (int arg) | |
35 | { | |
36 | test_first_observer++; | |
37 | } | |
38 | ||
39 | static void | |
40 | test_second_notification_function (int arg) | |
41 | { | |
42 | test_second_observer++; | |
43 | } | |
44 | ||
45 | static void | |
46 | test_third_notification_function (int arg) | |
47 | { | |
48 | test_third_observer++; | |
49 | } | |
50 | ||
51 | static void | |
52 | notify_check_counters (int one, int two, int three) | |
53 | { | |
54 | /* Reset. */ | |
55 | test_first_observer = 0; | |
56 | test_second_observer = 0; | |
57 | test_third_observer = 0; | |
58 | /* Notify. */ | |
59 | test_notification.notify (0); | |
60 | /* Check. */ | |
61 | SELF_CHECK (one == test_first_observer); | |
62 | SELF_CHECK (two == test_second_observer); | |
63 | SELF_CHECK (three == test_third_observer); | |
64 | } | |
65 | ||
66 | static void | |
67 | run_tests () | |
68 | { | |
69 | /* First, try sending a notification without any observer | |
70 | attached. */ | |
71 | notify_check_counters (0, 0, 0); | |
72 | ||
3dcfdc58 | 73 | const gdb::observers::token token1 {}, token2 {} , token3 {}; |
76727919 TT |
74 | |
75 | /* Now, attach one observer, and send a notification. */ | |
76 | test_notification.attach (&test_second_notification_function, token2); | |
77 | notify_check_counters (0, 1, 0); | |
78 | ||
79 | /* Remove the observer, and send a notification. */ | |
80 | test_notification.detach (token2); | |
81 | notify_check_counters (0, 0, 0); | |
82 | ||
83 | /* With a new observer. */ | |
84 | test_notification.attach (&test_first_notification_function, token1); | |
85 | notify_check_counters (1, 0, 0); | |
86 | ||
87 | /* With 2 observers. */ | |
88 | test_notification.attach (&test_second_notification_function, token2); | |
89 | notify_check_counters (1, 1, 0); | |
90 | ||
91 | /* With 3 observers. */ | |
92 | test_notification.attach (&test_third_notification_function, token3); | |
93 | notify_check_counters (1, 1, 1); | |
94 | ||
95 | /* Remove middle observer. */ | |
96 | test_notification.detach (token2); | |
97 | notify_check_counters (1, 0, 1); | |
98 | ||
99 | /* Remove first observer. */ | |
100 | test_notification.detach (token1); | |
101 | notify_check_counters (0, 0, 1); | |
102 | ||
103 | /* Remove last observer. */ | |
104 | test_notification.detach (token3); | |
105 | notify_check_counters (0, 0, 0); | |
106 | ||
107 | /* Go back to 3 observers, and remove them in a different | |
108 | order... */ | |
109 | test_notification.attach (&test_first_notification_function, token1); | |
110 | test_notification.attach (&test_second_notification_function, token2); | |
111 | test_notification.attach (&test_third_notification_function, token3); | |
112 | notify_check_counters (1, 1, 1); | |
113 | ||
114 | /* Remove the third observer. */ | |
115 | test_notification.detach (token3); | |
116 | notify_check_counters (1, 1, 0); | |
117 | ||
118 | /* Remove the second observer. */ | |
119 | test_notification.detach (token2); | |
120 | notify_check_counters (1, 0, 0); | |
121 | ||
122 | /* Remove first observer, no more observers. */ | |
123 | test_notification.detach (token1); | |
124 | notify_check_counters (0, 0, 0); | |
125 | } | |
126 | ||
127 | } /* namespace observers */ | |
128 | } /* namespace selftests */ | |
129 | ||
6c265988 | 130 | void _initialize_observer_selftest (); |
76727919 TT |
131 | void |
132 | _initialize_observer_selftest () | |
133 | { | |
134 | selftests::register_test ("gdb::observers", | |
135 | selftests::observers::run_tests); | |
136 | } |