1 /**
2 * collectd - src/utils_latency_test.c
3 * Copyright (C) 2015 Florian octo Forster
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 *
23 * Authors:
24 * Florian octo Forster <octo at collectd.org>
25 */
27 #define DBL_PRECISION 1e-9
29 #include "common.h" /* for STATIC_ARRAY_SIZE */
30 #include "collectd.h"
32 #include "testing.h"
33 #include "utils_latency.h"
34 #include "utils_time.h"
36 DEF_TEST(simple) {
37 struct {
38 double val;
39 double min;
40 double max;
41 double sum;
42 double avg;
43 } cases[] = {
44 /* val min max sum avg */
45 {0.5, 0.5, 0.5, 0.5, 0.5}, {0.3, 0.3, 0.5, 0.8, 0.4},
46 {0.7, 0.3, 0.7, 1.5, 0.5}, {2.5, 0.3, 2.5, 4.0, 1.0},
47 {99, 0.3, 99, 103, 20.6},
48 /* { -1, 0.3, 99, 103, 20.6}, see issue #1139 */
49 };
50 latency_counter_t *l;
52 CHECK_NOT_NULL(l = latency_counter_create());
54 for (size_t i = 0; i < STATIC_ARRAY_SIZE(cases); i++) {
55 printf("# case %zu: DOUBLE_TO_CDTIME_T(%g) = %" PRIu64 "\n", i,
56 cases[i].val, DOUBLE_TO_CDTIME_T(cases[i].val));
57 latency_counter_add(l, DOUBLE_TO_CDTIME_T(cases[i].val));
59 EXPECT_EQ_DOUBLE(cases[i].min,
60 CDTIME_T_TO_DOUBLE(latency_counter_get_min(l)));
61 EXPECT_EQ_DOUBLE(cases[i].max,
62 CDTIME_T_TO_DOUBLE(latency_counter_get_max(l)));
63 EXPECT_EQ_DOUBLE(cases[i].sum,
64 CDTIME_T_TO_DOUBLE(latency_counter_get_sum(l)));
65 EXPECT_EQ_DOUBLE(cases[i].avg,
66 CDTIME_T_TO_DOUBLE(latency_counter_get_average(l)));
67 }
69 latency_counter_destroy(l);
70 return 0;
71 }
73 DEF_TEST(percentile) {
74 latency_counter_t *l;
76 CHECK_NOT_NULL(l = latency_counter_create());
78 for (size_t i = 0; i < 100; i++) {
79 latency_counter_add(l, TIME_T_TO_CDTIME_T(((time_t)i) + 1));
80 }
82 EXPECT_EQ_DOUBLE(1.0, CDTIME_T_TO_DOUBLE(latency_counter_get_min(l)));
83 EXPECT_EQ_DOUBLE(100.0, CDTIME_T_TO_DOUBLE(latency_counter_get_max(l)));
84 EXPECT_EQ_DOUBLE(100.0 * 101.0 / 2.0,
85 CDTIME_T_TO_DOUBLE(latency_counter_get_sum(l)));
86 EXPECT_EQ_DOUBLE(50.5, CDTIME_T_TO_DOUBLE(latency_counter_get_average(l)));
88 EXPECT_EQ_DOUBLE(50.0,
89 CDTIME_T_TO_DOUBLE(latency_counter_get_percentile(l, 50.0)));
90 EXPECT_EQ_DOUBLE(80.0,
91 CDTIME_T_TO_DOUBLE(latency_counter_get_percentile(l, 80.0)));
92 EXPECT_EQ_DOUBLE(95.0,
93 CDTIME_T_TO_DOUBLE(latency_counter_get_percentile(l, 95.0)));
94 EXPECT_EQ_DOUBLE(99.0,
95 CDTIME_T_TO_DOUBLE(latency_counter_get_percentile(l, 99.0)));
97 CHECK_ZERO(latency_counter_get_percentile(l, -1.0));
98 CHECK_ZERO(latency_counter_get_percentile(l, 101.0));
100 latency_counter_destroy(l);
101 return 0;
102 }
104 int main(void) {
105 RUN_TEST(simple);
106 RUN_TEST(percentile);
108 END_TEST;
109 }
111 /* vim: set sw=2 sts=2 et : */