/
prometheus_histogram_tests.erl
436 lines (384 loc) · 21.2 KB
/
prometheus_histogram_tests.erl
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-module(prometheus_histogram_tests).
-include_lib("eunit/include/eunit.hrl").
-include("prometheus_model.hrl").
prometheus_format_test_() ->
{foreach,
fun prometheus_eunit_common:start/0,
fun prometheus_eunit_common:stop/1,
[fun test_registration/1,
fun test_errors/1,
fun test_buckets/1,
fun test_observe/1,
fun test_observe_n/0,
fun test_observe_duration_seconds/1,
fun test_observe_duration_milliseconds/1,
fun test_deregister/1,
fun test_remove/1,
fun test_default_value/1,
fun test_values/1,
fun test_collector1/1,
fun test_collector2/1,
fun test_collector3/1]}.
test_registration(_)->
Name = request_duration,
SpecWithRegistry = [{name, Name},
{buckets, [100, 300, 500, 750, 1000]},
{help, ""},
{registry, qwe}],
[?_assertEqual(true,
prometheus_histogram:declare(SpecWithRegistry)),
?_assertError({mf_already_exists, {qwe, Name}, "Consider using declare instead."},
prometheus_histogram:new(SpecWithRegistry))].
test_errors(_) ->
prometheus_histogram:new([{name, request_duration},
{buckets, [100, 300, 500, 750, 1000]},
{help, "Track requests duration"}]),
prometheus_histogram:new([{name, db_query_duration},
{labels, [repo]},
{help, ""}]),
[%% basic name/labels/help validations test
?_assertError({invalid_metric_name, 12, "metric name is not a string"},
prometheus_histogram:new([{name, 12}, {help, ""}])),
?_assertError({invalid_metric_labels, 12, "not list"},
prometheus_histogram:new([{name, "qwe"}, {labels, 12}, {help, ""}])),
?_assertError({invalid_metric_label_name, "le",
"histogram cannot have a label named \"le\""},
prometheus_histogram:new([{name, "qwe"},
{labels, ["qwe", "le"]}, {help, ""}])),
?_assertError({invalid_metric_help, 12, "metric help is not a string"},
prometheus_histogram:new([{name, "qwe"}, {help, 12}])),
%% mf/arity errors
?_assertError({unknown_metric, default, unknown_metric},
prometheus_histogram:observe(unknown_metric, 1)),
?_assertError({unknown_metric, default, unknown_metric},
prometheus_histogram:observe_n(unknown_metric, 1, 1)),
?_assertError({invalid_metric_arity, 2, 1},
prometheus_histogram:observe(db_query_duration, [repo, db], 1)),
?_assertError({invalid_metric_arity, 2, 1},
prometheus_histogram:observe_n(db_query_duration, [repo, db], 1, 1)),
?_assertError({unknown_metric, default, unknown_metric},
prometheus_histogram:observe_duration(unknown_metric, fun() -> 1 end)),
?_assertError({invalid_metric_arity, 2, 1},
prometheus_histogram:observe_duration(db_query_duration,
[repo, db],
fun() -> 1 end)),
?_assertError({unknown_metric, default, unknown_metric},
prometheus_histogram:reset(unknown_metric)),
?_assertError({invalid_metric_arity, 2, 1},
prometheus_histogram:reset(db_query_duration, [repo, db])),
?_assertError({unknown_metric, default, unknown_metric},
prometheus_histogram:value(unknown_metric)),
?_assertError({invalid_metric_arity, 2, 1},
prometheus_histogram:value(db_query_duration, [repo, db])),
?_assertError({unknown_metric, default, unknown_metric},
prometheus_histogram:buckets(unknown_metric)),
?_assertError({invalid_metric_arity, 2, 1},
prometheus_histogram:buckets(db_query_duration, [repo, db])),
?_assertError({unknown_metric, default, unknown_metric},
prometheus_histogram:remove(unknown_metric)),
?_assertError({invalid_metric_arity, 2, 1},
prometheus_histogram:remove(db_query_duration, [repo, db])),
%% histogram specific errors
?_assertError({no_buckets, []},
prometheus_histogram:new([{name, "qwe"}, {help, ""}, {buckets, []}])),
?_assertError({no_buckets, undefined},
prometheus_histogram:new([{name, "qwe"},
{help, ""},
{buckets, undefined}])),
?_assertError({invalid_buckets, 1, "not a list"},
prometheus_histogram:new([{name, "qwe"}, {help, ""}, {buckets, 1}])),
?_assertError({invalid_bound, "qwe"},
prometheus_histogram:new([{name, "qwe"},
{help, ""},
{buckets, ["qwe"]}])),
?_assertError({invalid_buckets, [1, 3, 2], "buckets not sorted"},
prometheus_histogram:new([{name, "qwe"},
{help, ""},
{buckets, [1, 3, 2]}])),
?_assertError({invalid_value, "qwe", "observe accepts only numbers"},
prometheus_histogram:observe(request_duration, "qwe")),
?_assertError({invalid_value, "qwe", "observe_n accepts only number values"},
prometheus_histogram:observe_n(request_duration, "qwe", 3)),
?_assertError({invalid_count, "qwe", "observe_n accepts only integer counts"},
prometheus_histogram:observe_n(request_duration, 300, "qwe")),
?_assertError({invalid_value, "qwe", "observe_duration accepts only functions"},
prometheus_histogram:observe_duration(pool_size, "qwe"))
].
test_buckets(_) ->
prometheus_histogram:new([{name, "default_buckets"}, {help, ""}]),
DefaultBuckets = prometheus_histogram:buckets("default_buckets"),
prometheus_histogram:new([{name, http_request_duration_milliseconds},
{labels, [method]},
{buckets, [100, 300, 500, 750, 1000]},
{help, "Http Request execution time"},
{duration_unit, false}]),
prometheus_histogram:new([{name, "explicit_default_buckets"},
{help, ""},
{buckets, default}]),
ExplicitDefaultBuckets = prometheus_histogram:buckets("explicit_default_buckets"),
prometheus_histogram:new([{name, "linear_buckets"},
{help, ""},
{buckets, {linear, -15, 5, 6}}]),
LinearBuckets = prometheus_histogram:buckets("linear_buckets"),
prometheus_histogram:declare([{name, "exp_buckets"},
{help, ""},
{buckets, {exponential, 100, 1.2, 3}}]),
ExpBuckets = prometheus_histogram:buckets("exp_buckets"),
CustomBuckets = prometheus_histogram:buckets(http_request_duration_milliseconds,
[method]),
[?_assertEqual(prometheus_buckets:default() ++ [infinity],
DefaultBuckets),
?_assertEqual(prometheus_buckets:default() ++ [infinity],
ExplicitDefaultBuckets),
?_assertEqual([100, 300, 500, 750, 1000, infinity], CustomBuckets),
?_assertEqual([-15, -10, -5, 0, 5, 10, infinity], LinearBuckets),
?_assertEqual([100, 120, 144, infinity], ExpBuckets)].
test_observe(_) ->
prometheus_histogram:new([{name, http_request_duration_milliseconds},
{labels, [method]},
{buckets, [100, 300, 500, 750, 1000]},
{help, "Http Request execution time"},
{duration_unit, false}]),
prometheus_histogram:observe(http_request_duration_milliseconds, [get], 95),
prometheus_histogram:observe(http_request_duration_milliseconds, [get], 100),
prometheus_histogram:observe(http_request_duration_milliseconds, [get], 102),
prometheus_histogram:observe(http_request_duration_milliseconds, [get], 150),
prometheus_histogram:observe(http_request_duration_milliseconds, [get], 250),
prometheus_histogram:observe(http_request_duration_milliseconds, [get], 75),
prometheus_histogram:observe(http_request_duration_milliseconds, [get], 350),
prometheus_histogram:observe(http_request_duration_milliseconds, [get], 550),
prometheus_histogram:observe(http_request_duration_milliseconds, [get], 950),
prometheus_histogram:observe(http_request_duration_milliseconds, [get], 500.2),
prometheus_histogram:observe(http_request_duration_milliseconds, [get], 150.4),
prometheus_histogram:observe(http_request_duration_milliseconds, [get], 450.5),
prometheus_histogram:observe(http_request_duration_milliseconds, [get], 850.3),
prometheus_histogram:observe(http_request_duration_milliseconds, [get], 750.9),
prometheus_histogram:observe(http_request_duration_milliseconds, [get], 1650.23),
Value = prometheus_histogram:value(http_request_duration_milliseconds, [get]),
prometheus_histogram:reset(http_request_duration_milliseconds, [get]),
RValue = prometheus_histogram:value(http_request_duration_milliseconds, [get]),
[?_assertMatch({[3, 4, 2, 2, 3, 1], Sum}
when Sum > 6974.5 andalso Sum < 6974.55, Value),
?_assertEqual({[0, 0, 0, 0, 0, 0], 0}, RValue)].
test_observe_n() ->
prometheus_histogram:new([{name, temp}, {help, "temp"}, {buckets, [10, 20, 30, 40, 50]}]),
?assertEqual({[0, 0, 0, 0, 0, 0], 0}, prometheus_histogram:value(temp)),
prometheus_histogram:observe_n(temp, 5.5, 2), Sum1 = 5.5 * 2,
?assertEqual({[2, 0, 0, 0, 0, 0], Sum1}, prometheus_histogram:value(temp)),
prometheus_histogram:observe(temp, 15.5), Sum2 = Sum1 + 15.5,
?assertEqual({[2, 1, 0, 0, 0, 0], Sum2}, prometheus_histogram:value(temp)),
prometheus_histogram:observe(temp, 1), Sum3 = Sum2 + 1,
?assertEqual({[3, 1, 0, 0, 0, 0], Sum3}, prometheus_histogram:value(temp)),
ok.
test_observe_duration_seconds(_) ->
prometheus_histogram:new([{name, fun_duration_seconds},
{buckets, [0.5, 1.1]},
{help, ""}]),
prometheus_histogram:observe_duration(fun_duration_seconds, fun () ->
timer:sleep(1000)
end),
{Buckets, Sum} = prometheus_histogram:value(fun_duration_seconds),
try prometheus_histogram:observe_duration(fun_duration_seconds,
fun () ->
erlang:error({qwe})
end)
catch _:_ -> ok
end,
{BucketsE, SumE} = prometheus_histogram:value(fun_duration_seconds),
[MF] = prometheus_collector:collect_mf_to_list(prometheus_histogram),
MBuckets = [#'Bucket'{cumulative_count=1,
upper_bound=0.5},
#'Bucket'{cumulative_count=2,
upper_bound=1.1},
#'Bucket'{cumulative_count=2,
upper_bound=infinity}],
#'MetricFamily'{metric=
[#'Metric'{histogram=
#'Histogram'{sample_sum=MFSum,
sample_count=MFCount,
bucket=MBuckets}}]} = MF,
[?_assertEqual([0, 1, 0], Buckets),
?_assertEqual([1, 1, 0], BucketsE),
?_assertEqual(true, 0.9 < Sum andalso Sum < 1.2),
?_assertEqual(true, 0.9 < SumE andalso SumE < 1.2),
?_assertEqual(2, MFCount),
?_assertEqual(true, 0.9 < MFSum andalso MFSum < 1.2)].
test_observe_duration_milliseconds(_) ->
prometheus_histogram:new([{name, fun_duration_histogram},
{buckets, [500, 1100]},
{help, ""},
{duration_unit, milliseconds}]),
prometheus_histogram:observe_duration(fun_duration_histogram, fun () ->
timer:sleep(1000)
end),
{Buckets, Sum} = prometheus_histogram:value(fun_duration_histogram),
try prometheus_histogram:observe_duration(fun_duration_histogram,
fun () ->
erlang:error({qwe})
end)
catch _:_ -> ok
end,
{BucketsE, SumE} = prometheus_histogram:value(fun_duration_histogram),
[?_assertEqual([0, 1, 0], Buckets),
?_assertEqual([1, 1, 0], BucketsE),
?_assertMatch(true, 900 < Sum andalso Sum < 1200),
?_assertMatch(true, 900 < SumE andalso SumE < 1200)].
test_deregister(_) ->
prometheus_histogram:new([{name, histogram},
{buckets, [5, 10]},
{labels, [pool]},
{help, ""}]),
prometheus_histogram:new([{name, simple_histogram},
{buckets, [5, 10]},
{help, ""}]),
prometheus_histogram:observe(histogram, [mongodb], 1),
prometheus_histogram:observe(simple_histogram, 1),
prometheus_histogram:observe(histogram, [mongodb], 6),
prometheus_histogram:observe(simple_histogram, 6),
[?_assertMatch({true, true}, prometheus_histogram:deregister(histogram)),
?_assertMatch({false, false}, prometheus_histogram:deregister(histogram)),
?_assertEqual(2, length(ets:tab2list(prometheus_histogram_table))),
?_assertEqual({[1, 1, 0], 7}, prometheus_histogram:value(simple_histogram))
].
test_remove(_) ->
prometheus_histogram:new([{name, histogram},
{buckets, [5, 10]},
{labels, [pool]},
{help, ""}]),
prometheus_histogram:new([{name, simple_histogram},
{buckets, [5, 10]},
{help, ""}]),
prometheus_histogram:observe(histogram, [mongodb], 1),
prometheus_histogram:observe(simple_histogram, 1),
prometheus_histogram:observe(histogram, [mongodb], 6),
prometheus_histogram:observe(simple_histogram, 6),
BRValue1 = prometheus_histogram:value(histogram, [mongodb]),
BRValue2 = prometheus_histogram:value(simple_histogram),
RResult1 = prometheus_histogram:remove(histogram, [mongodb]),
RResult2 = prometheus_histogram:remove(simple_histogram),
ARValue1 = prometheus_histogram:value(histogram, [mongodb]),
ARValue2 = prometheus_histogram:value(simple_histogram),
RResult3 = prometheus_histogram:remove(histogram, [mongodb]),
RResult4 = prometheus_histogram:remove(simple_histogram),
[?_assertEqual({[1, 1, 0], 7}, BRValue1),
?_assertEqual({[1, 1, 0], 7}, BRValue2),
?_assertEqual(true, RResult1),
?_assertEqual(true, RResult2),
?_assertEqual(undefined, ARValue1),
?_assertEqual(undefined, ARValue2),
?_assertEqual(false, RResult3),
?_assertEqual(false, RResult4)].
test_default_value(_) ->
prometheus_histogram:new([{name, duration_histogram},
{labels, [label]},
{help, ""}]),
UndefinedValue = prometheus_histogram:value(duration_histogram, [label]),
prometheus_histogram:new([{name, something_histogram},
{labels, []},
{help, ""},
{buckets, [5, 10]}]),
SomethingValue = prometheus_histogram:value(something_histogram),
[?_assertEqual(undefined, UndefinedValue),
?_assertEqual({[0, 0, 0], 0}, SomethingValue)].
test_values(_) ->
prometheus_histogram:new([{name, duration_histogram},
{labels, [label]},
{help, ""}]),
prometheus_histogram:observe(duration_histogram, [label1], 12),
prometheus_histogram:observe(duration_histogram, [label2], 111),
[?_assertEqual([{[{"label", label1}],
[{0.005, 0},
{0.01, 0},
{0.025, 0},
{0.05, 0},
{0.1, 0},
{0.25, 0},
{0.5, 0},
{1, 0},
{2.5, 0},
{5, 0},
{10, 0},
{infinity, 1}],
12},
{[{"label", label2}],
[{0.005, 0},
{0.01, 0},
{0.025, 0},
{0.05, 0},
{0.1, 0},
{0.25, 0},
{0.5, 0},
{1, 0},
{2.5, 0},
{5, 0},
{10, 0},
{infinity, 1}],
111}],
lists:sort(prometheus_histogram:values(default, duration_histogram)))].
test_collector1(_) ->
prometheus_histogram:new([{name, simple_histogram},
{labels, ["label"]},
{buckets, [5, 10]},
{help, ""}]),
prometheus_histogram:observe(simple_histogram, [label_value], 4),
[?_assertMatch([#'MetricFamily'{metric=
[#'Metric'{label=[#'LabelPair'{name= "label",
value= <<"label_value">>}],
histogram=#'Histogram'{sample_count=1,
sample_sum=4,
bucket=[#'Bucket'{cumulative_count=1,
upper_bound=5},
#'Bucket'{cumulative_count=1,
upper_bound=10},
#'Bucket'{cumulative_count=1,
upper_bound=infinity}]}}]}],
prometheus_collector:collect_mf_to_list(prometheus_histogram))].
test_collector2(_) ->
prometheus_histogram:new([{name, simple_histogram},
{labels, ["label"]},
{constant_labels, #{qwe => qwa}},
{buckets, [5, 10]},
{help, ""}]),
prometheus_histogram:observe(simple_histogram, [label_value], 7),
[?_assertMatch([#'MetricFamily'{metric=
[#'Metric'{label=[#'LabelPair'{name= <<"qwe">>,
value= <<"qwa">>},
#'LabelPair'{name= "label",
value= <<"label_value">>}],
histogram=#'Histogram'{sample_count=1,
sample_sum=7,
bucket=[#'Bucket'{cumulative_count=0,
upper_bound=5},
#'Bucket'{cumulative_count=1,
upper_bound=10},
#'Bucket'{cumulative_count=1,
upper_bound=infinity}]}}]}],
prometheus_collector:collect_mf_to_list(prometheus_histogram))].
test_collector3(_) ->
MFList = try
prometheus:start(),
application:set_env(prometheus, global_labels, [{node, node()}]),
prometheus_histogram:new([{name, simple_histogram},
{labels, ["label"]},
{buckets, [5, 10]},
{help, ""}]),
prometheus_histogram:observe(simple_histogram, [label_value], 7),
prometheus_collector:collect_mf_to_list(prometheus_histogram)
after
application:unset_env(prometheus, global_labels)
end,
NodeBin = atom_to_binary(node(), utf8),
[?_assertMatch([#'MetricFamily'{metric=
[#'Metric'{label=[#'LabelPair'{name= <<"node">>,
value= NodeBin},
#'LabelPair'{name= "label",
value= <<"label_value">>}],
histogram=#'Histogram'{sample_count=1,
sample_sum=7,
bucket=[#'Bucket'{cumulative_count=0,
upper_bound=5},
#'Bucket'{cumulative_count=1,
upper_bound=10},
#'Bucket'{cumulative_count=1,
upper_bound=infinity}]}}]}],
MFList)].