xref: /third_party/libuv/test/test-random.c (revision e66f31c5) 
1/* Copyright libuv contributors. All rights reserved.
2 *
3 * Permission is hereby granted, free of charge, to any person obtaining a copy
4 * of this software and associated documentation files (the "Software"), to
5 * deal in the Software without restriction, including without limitation the
6 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
7 * sell copies of the Software, and to permit persons to whom the Software is
8 * furnished to do so, subject to the following conditions:
9 *
10 * The above copyright notice and this permission notice shall be included in
11 * all copies or substantial portions of the Software.
12 *
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
18 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
19 * IN THE SOFTWARE.
20 */
21
22#include "uv.h"
23#include "task.h"
24
25#include <string.h>
26
27static char scratch[256];
28static int random_cb_called;
29
30
31static void random_cb(uv_random_t* req, int status, void* buf, size_t buflen) {
32  char zero[sizeof(scratch)];
33
34  memset(zero, 0, sizeof(zero));
35
36  ASSERT_OK(status);
37  ASSERT_PTR_EQ(buf, (void*) scratch);
38
39  if (random_cb_called == 0) {
40    ASSERT_OK(buflen);
41    ASSERT_OK(memcmp(scratch, zero, sizeof(zero)));
42  } else {
43    ASSERT_EQ(buflen, sizeof(scratch));
44    /* Buy a lottery ticket if you manage to trip this assertion. */
45    ASSERT_NE(0, memcmp(scratch, zero, sizeof(zero)));
46  }
47
48  random_cb_called++;
49}
50
51
52TEST_IMPL(random_async) {
53  uv_random_t req;
54  uv_loop_t* loop;
55
56  loop = uv_default_loop();
57  ASSERT_EQ(UV_EINVAL, uv_random(loop, &req, scratch, sizeof(scratch), -1,
58                                 random_cb));
59  ASSERT_EQ(UV_E2BIG, uv_random(loop, &req, scratch, -1, -1, random_cb));
60
61  ASSERT_OK(uv_random(loop, &req, scratch, 0, 0, random_cb));
62  ASSERT_OK(random_cb_called);
63
64  ASSERT_OK(uv_run(loop, UV_RUN_DEFAULT));
65  ASSERT_EQ(1, random_cb_called);
66
67  ASSERT_OK(uv_random(loop, &req, scratch, sizeof(scratch), 0, random_cb));
68  ASSERT_EQ(1, random_cb_called);
69
70  ASSERT_OK(uv_run(loop, UV_RUN_DEFAULT));
71  ASSERT_EQ(2, random_cb_called);
72
73  MAKE_VALGRIND_HAPPY(loop);
74  return 0;
75}
76
77
78TEST_IMPL(random_sync) {
79  char zero[256];
80  char buf[256];
81
82  ASSERT_EQ(UV_EINVAL, uv_random(NULL, NULL, buf, sizeof(buf), -1, NULL));
83  ASSERT_EQ(UV_E2BIG, uv_random(NULL, NULL, buf, -1, -1, NULL));
84
85  memset(buf, 0, sizeof(buf));
86  ASSERT_OK(uv_random(NULL, NULL, buf, sizeof(buf), 0, NULL));
87
88  /* Buy a lottery ticket if you manage to trip this assertion. */
89  memset(zero, 0, sizeof(zero));
90  ASSERT_NE(0, memcmp(buf, zero, sizeof(zero)));
91
92  MAKE_VALGRIND_HAPPY(uv_default_loop());
93  return 0;
94}
95