1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
|
#!/usr/bin/env escript
%% -*- erlang -*-
% Licensed under the Apache License, Version 2.0 (the "License"); you may not
% use this file except in compliance with the License. You may obtain a copy of
% the License at
%
% http://www.apache.org/licenses/LICENSE-2.0
%
% Unless required by applicable law or agreed to in writing, software
% distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
% WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
% License for the specific language governing permissions and limitations under
% the License.
main(_) ->
code:add_patha("src/etap"),
code:add_pathz("src/couchdb"),
etap:plan(11),
case (catch test()) of
ok ->
etap:end_tests();
Other ->
etap:diag(io_lib:format("Test died abnormally: ~p", [Other])),
etap:bail()
end,
ok.
test() ->
couch_stats_collector:start(),
ok = test_counters(),
ok = test_abs_values(),
ok = test_proc_counting(),
ok = test_all(),
ok.
test_counters() ->
AddCount = fun() -> couch_stats_collector:increment(foo) end,
RemCount = fun() -> couch_stats_collector:decrement(foo) end,
repeat(AddCount, 100),
repeat(RemCount, 25),
repeat(AddCount, 10),
repeat(RemCount, 5),
etap:is(
couch_stats_collector:get(foo),
80,
"Incrememnt tracks correctly."
),
repeat(RemCount, 80),
etap:is(
couch_stats_collector:get(foo),
0,
"Decremented to zaro."
),
ok.
test_abs_values() ->
lists:map(fun(Val) ->
couch_stats_collector:record(bar, Val)
end, lists:seq(1, 15)),
etap:is(
couch_stats_collector:get(bar),
lists:seq(1, 15),
"Absolute values are recorded correctly."
),
couch_stats_collector:clear(bar),
etap:is(
couch_stats_collector:get(bar),
nil,
"Absolute values are cleared correctly."
),
ok.
test_proc_counting() ->
Self = self(),
OnePid = spawn(fun() ->
couch_stats_collector:track_process_count(hoopla),
Self ! reporting,
receive sepuku -> ok end
end),
R1 = erlang:monitor(process, OnePid),
receive reporting -> ok end,
etap:is(
couch_stats_collector:get(hoopla),
1,
"track_process_count incrememnts the counter."
),
TwicePid = spawn(fun() ->
couch_stats_collector:track_process_count(hoopla),
couch_stats_collector:track_process_count(hoopla),
Self ! reporting,
receive sepuku -> ok end
end),
R2 = erlang:monitor(process, TwicePid),
receive reporting -> ok end,
etap:is(
couch_stats_collector:get(hoopla),
3,
"track_process_count allows more than one incrememnt per Pid"
),
OnePid ! sepuku,
receive {'DOWN', R1, _, _, _} -> ok end,
timer:sleep(250),
etap:is(
couch_stats_collector:get(hoopla),
2,
"Process count is decremented when process exits."
),
TwicePid ! sepuku,
receive {'DOWN', R2, _, _, _} -> ok end,
timer:sleep(250),
etap:is(
couch_stats_collector:get(hoopla),
0,
"Process count is decremented for each call to track_process_count."
),
ok.
test_all() ->
couch_stats_collector:record(bar, 0.0),
couch_stats_collector:record(bar, 1.0),
etap:is(
couch_stats_collector:all(),
[{foo, 0}, {hoopla, 0}, {bar, [1.0, 0.0]}],
"all/0 returns all counters and absolute values."
),
etap:is(
couch_stats_collector:all(incremental),
[{foo, 0}, {hoopla, 0}],
"all/1 returns only the specified type."
),
couch_stats_collector:record(zing, 90),
etap:is(
couch_stats_collector:all(absolute),
[{zing, [90]}, {bar, [1.0, 0.0]}],
"all/1 returns only the specified type."
),
ok.
repeat(_, 0) ->
ok;
repeat(Fun, Count) ->
Fun(),
repeat(Fun, Count-1).
|
