a0da51ea7a518329f743839c8b22be6605452b22
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_time.h"
34 #include "utils_latency.h"
36 DEF_TEST(simple)
37 {
38 struct {
39 double val;
40 double min;
41 double max;
42 double sum;
43 double avg;
44 } cases[] = {
45 /* val min max sum avg */
46 {0.5, 0.5, 0.5, 0.5, 0.5},
47 {0.3, 0.3, 0.5, 0.8, 0.4},
48 {0.7, 0.3, 0.7, 1.5, 0.5},
49 {2.5, 0.3, 2.5, 4.0, 1.0},
50 { 99, 0.3, 99, 103, 20.6},
51 /* { -1, 0.3, 99, 103, 20.6}, see issue #1139 */
52 };
53 size_t i;
54 latency_counter_t *l;
56 CHECK_NOT_NULL (l = latency_counter_create ());
58 for (i = 0; i < STATIC_ARRAY_SIZE (cases); i++) {
59 printf ("# case %zu: DOUBLE_TO_CDTIME_T(%g) = %"PRIu64"\n",
60 i, cases[i].val, DOUBLE_TO_CDTIME_T (cases[i].val));
61 latency_counter_add (l, DOUBLE_TO_CDTIME_T (cases[i].val));
63 EXPECT_EQ_DOUBLE (cases[i].min, CDTIME_T_TO_DOUBLE (latency_counter_get_min (l)));
64 EXPECT_EQ_DOUBLE (cases[i].max, CDTIME_T_TO_DOUBLE (latency_counter_get_max (l)));
65 EXPECT_EQ_DOUBLE (cases[i].sum, CDTIME_T_TO_DOUBLE (latency_counter_get_sum (l)));
66 EXPECT_EQ_DOUBLE (cases[i].avg, CDTIME_T_TO_DOUBLE (latency_counter_get_average (l)));
67 }
69 latency_counter_destroy (l);
70 return 0;
71 }
73 DEF_TEST(percentile)
74 {
75 size_t i;
76 latency_counter_t *l;
78 CHECK_NOT_NULL (l = latency_counter_create ());
80 for (i = 0; i < 100; i++) {
81 latency_counter_add (l, TIME_T_TO_CDTIME_T (((time_t) i) + 1));
82 }
84 EXPECT_EQ_DOUBLE ( 1.0, CDTIME_T_TO_DOUBLE (latency_counter_get_min (l)));
85 EXPECT_EQ_DOUBLE (100.0, CDTIME_T_TO_DOUBLE (latency_counter_get_max (l)));
86 EXPECT_EQ_DOUBLE (100.0 * 101.0 / 2.0, CDTIME_T_TO_DOUBLE (latency_counter_get_sum (l)));
87 EXPECT_EQ_DOUBLE ( 50.5, CDTIME_T_TO_DOUBLE (latency_counter_get_average (l)));
89 EXPECT_EQ_DOUBLE (50.0, CDTIME_T_TO_DOUBLE (latency_counter_get_percentile (l, 50.0)));
90 EXPECT_EQ_DOUBLE (80.0, CDTIME_T_TO_DOUBLE (latency_counter_get_percentile (l, 80.0)));
91 EXPECT_EQ_DOUBLE (95.0, CDTIME_T_TO_DOUBLE (latency_counter_get_percentile (l, 95.0)));
92 EXPECT_EQ_DOUBLE (99.0, CDTIME_T_TO_DOUBLE (latency_counter_get_percentile (l, 99.0)));
94 CHECK_ZERO (latency_counter_get_percentile (l, -1.0));
95 CHECK_ZERO (latency_counter_get_percentile (l, 101.0));
97 latency_counter_destroy (l);
98 return 0;
99 }
101 int main (void)
102 {
103 RUN_TEST(simple);
104 RUN_TEST(percentile);
106 END_TEST;
107 }
109 /* vim: set sw=2 sts=2 et : */