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404 lines
16 KiB
404 lines
16 KiB
using HTTP: HTTP |
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using Prometheus: Prometheus |
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using Test: @test, @test_throws, @testset |
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@testset "Prometheus.CollectorRegistry" begin |
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empty!(Prometheus.DEFAULT_REGISTRY.collectors) |
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# Default registry |
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c = Prometheus.Counter("metric_name_counter", "A counter.") |
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@test c in Prometheus.DEFAULT_REGISTRY.collectors |
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@test_throws ErrorException Prometheus.Counter("metric_name_counter", "A counter.") |
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Prometheus.unregister(Prometheus.DEFAULT_REGISTRY, c) |
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@test !(c in Prometheus.DEFAULT_REGISTRY.collectors) |
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c2 = Prometheus.Counter("metric_name_counter", "A counter.") |
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@test c2 in Prometheus.DEFAULT_REGISTRY.collectors |
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# Provided registry |
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r = Prometheus.CollectorRegistry() |
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c = Prometheus.Counter(r, "metric_name_counter", "A counter.") |
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@test c in r.collectors |
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@test !(c in Prometheus.DEFAULT_REGISTRY.collectors) |
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# No registry on construction, register after |
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c = Prometheus.Counter(nothing, "metric_name_counter", "A counter.") |
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@test !(c in Prometheus.DEFAULT_REGISTRY.collectors) |
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r = Prometheus.CollectorRegistry() |
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Prometheus.register(r, c) |
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@test c in r.collectors |
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@test_throws ErrorException Prometheus.register(r, c) |
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end |
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@testset "Prometheus.Counter" begin |
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# Constructors and implicit registration |
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empty!(Prometheus.DEFAULT_REGISTRY.collectors) |
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c = Prometheus.Counter("metric_name_counter", "A counter.") |
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@test c in Prometheus.DEFAULT_REGISTRY.collectors |
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r = Prometheus.CollectorRegistry() |
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c = Prometheus.Counter(r, "metric_name_counter", "A counter.") |
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@test c in r.collectors |
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@test c.value == 0 |
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# Prometheus.inc(...) |
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Prometheus.inc(c) |
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@test c.value == 1 |
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Prometheus.inc(c, 0) |
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@test c.value == 1 |
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Prometheus.inc(c, 2) |
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@test c.value == 3 |
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@test_throws ErrorException Prometheus.inc(c, -1) |
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# Prometheus.collect(...) |
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metrics = Prometheus.collect(c) |
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@test length(metrics) == 1 |
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metric = metrics[1] |
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@test metric.metric_name == c.metric_name |
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@test metric.help == c.help |
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@test metric.samples.value == c.value |
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# Prometheus.expose_metric(...) |
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@test sprint(Prometheus.expose_metric, metric) == |
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sprint(Prometheus.expose_io, r) == |
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""" |
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# HELP metric_name_counter A counter. |
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# TYPE metric_name_counter counter |
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metric_name_counter 3 |
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""" |
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end |
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@testset "Prometheus.Gauge" begin |
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# Constructors and implicit registration |
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empty!(Prometheus.DEFAULT_REGISTRY.collectors) |
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c = Prometheus.Gauge("metric_name_gauge", "A gauge.") |
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@test c in Prometheus.DEFAULT_REGISTRY.collectors |
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r = Prometheus.CollectorRegistry() |
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c = Prometheus.Gauge(r, "metric_name_gauge", "A gauge.") |
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@test c in r.collectors |
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@test c.value == 0 |
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# Prometheus.inc(...) |
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Prometheus.inc(c) |
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@test c.value == 1 |
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Prometheus.inc(c, 0) |
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@test c.value == 1 |
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Prometheus.inc(c, 2) |
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@test c.value == 3 |
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@test_throws ErrorException Prometheus.inc(c, -1) |
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# Prometheus.dec(...) |
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Prometheus.dec(c) |
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@test c.value == 2 |
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Prometheus.dec(c, 1) |
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@test c.value == 1 |
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@test_throws ErrorException Prometheus.dec(c, -1) |
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# Prometheus.set_to_current_time(...) |
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t0 = time() |
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sleep(0.1) |
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Prometheus.set_to_current_time(c) |
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sleep(0.1) |
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@test t0 < c.value < time() |
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# Prometheus.set(...) |
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Prometheus.set(c, 42) |
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@test c.value == 42 |
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# Prometheus.collect(...) |
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metrics = Prometheus.collect(c) |
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@test length(metrics) == 1 |
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metric = metrics[1] |
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@test metric.metric_name == c.metric_name |
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@test metric.help == c.help |
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@test metric.samples.value == c.value |
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# Prometheus.expose_metric(...) |
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@test sprint(Prometheus.expose_metric, metric) == |
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sprint(Prometheus.expose_io, r) == |
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""" |
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# HELP metric_name_gauge A gauge. |
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# TYPE metric_name_gauge gauge |
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metric_name_gauge 42 |
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""" |
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end |
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@testset "Prometheus.Summary" begin |
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# Constructors and implicit registration |
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empty!(Prometheus.DEFAULT_REGISTRY.collectors) |
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c = Prometheus.Summary("metric_name_summary", "A summary.") |
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@test c in Prometheus.DEFAULT_REGISTRY.collectors |
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r = Prometheus.CollectorRegistry() |
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c = Prometheus.Summary(r, "metric_name_summary", "A summary.") |
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@test c in r.collectors |
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@test c._count == 0 |
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@test c._sum == 0 |
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# Prometheus.observe(...) |
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Prometheus.observe(c, 1) |
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@test c._count == 1 |
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@test c._sum == 1 |
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Prometheus.observe(c, 10) |
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@test c._count == 2 |
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@test c._sum == 11 |
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# Prometheus.collect(...) |
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metrics = Prometheus.collect(c) |
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@test length(metrics) == 1 |
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metric = metrics[1] |
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@test metric.metric_name == c.metric_name |
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@test metric.help == c.help |
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@test length(metric.samples) == 2 |
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s1, s2 = metric.samples[1], metric.samples[2] |
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@test s1.suffix == "_count" |
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@test s2.suffix == "_sum" |
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@test s1.labels === nothing |
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@test s2.labels === nothing |
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@test s1.value == 2 |
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@test s2.value == 11 |
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# Prometheus.expose_metric(...) |
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@test sprint(Prometheus.expose_metric, metric) == |
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sprint(Prometheus.expose_io, r) == |
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""" |
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# HELP metric_name_summary A summary. |
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# TYPE metric_name_summary summary |
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metric_name_summary_count 2 |
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metric_name_summary_sum 11 |
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""" |
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end |
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@testset "Prometheus.LabelNames and Prometheus.LabelValues" begin |
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# Custom hashing |
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v1 = Prometheus.LabelValues(["foo", "bar"]) |
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v2 = Prometheus.LabelValues(["foo", "bar"]) |
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v3 = Prometheus.LabelValues(["foo", "baz"]) |
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@test hash(v1) == hash(v2) |
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@test hash(v1) != hash(v3) |
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@test v1 == v2 |
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@test v1 != v3 |
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@test isequal(v1, v2) |
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@test !isequal(v1, v3) |
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end |
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@testset "Prometheus.Family{$(Collector)}" for Collector in (Prometheus.Counter, Prometheus.Gauge) |
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# Constructors and implicit registration |
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empty!(Prometheus.DEFAULT_REGISTRY.collectors) |
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c = Prometheus.Family{Collector}( |
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"http_requests", "Number of HTTP requests.", |
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["endpoint", "status_code"], |
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) |
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@test c in Prometheus.DEFAULT_REGISTRY.collectors |
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r = Prometheus.CollectorRegistry() |
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c = Prometheus.Family{Collector}( |
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r, "http_requests", "Number of HTTP requests.", |
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["endpoint", "status_code"], |
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) |
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@test c in r.collectors |
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@test length(c.children) == 0 |
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# Prometheus.labels(...), Prometheus.remove(...), Prometheus.clear() |
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l1 = ["/foo/", "200"] |
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l2 = ["/bar/", "404"] |
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@test Prometheus.labels(c, l1) === Prometheus.labels(c, l1) |
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@test Prometheus.labels(c, l2) === Prometheus.labels(c, l2) |
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@test length(c.children) == 2 |
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@test Prometheus.labels(c, l1).value == 0 |
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@test Prometheus.labels(c, l2).value == 0 |
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Prometheus.remove(c, l1) |
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@test length(c.children) == 1 |
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Prometheus.clear(c) |
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@test length(c.children) == 0 |
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# Prometheus.inc(...) |
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Prometheus.inc(Prometheus.labels(c, l1)) |
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Prometheus.inc(Prometheus.labels(c, l2)) |
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@test Prometheus.labels(c, l1).value == 1 |
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@test Prometheus.labels(c, l2).value == 1 |
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Prometheus.inc(Prometheus.labels(c, l1), 2) |
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Prometheus.inc(Prometheus.labels(c, l2), 2) |
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@test Prometheus.labels(c, l1).value == 3 |
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@test Prometheus.labels(c, l2).value == 3 |
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# Prometheus.collect(...) |
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metrics = Prometheus.collect(c) |
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@test length(metrics) == 1 |
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metric = metrics[1] |
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@test metric.metric_name == c.metric_name |
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@test metric.help == c.help |
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@test length(metric.samples) == 2 |
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s1, s2 = metric.samples[1], metric.samples[2] |
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@test s1.labels.labelvalues == ["/bar/", "404"] |
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@test s2.labels.labelvalues == ["/foo/", "200"] |
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@test s1.value == 3 |
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@test s2.value == 3 |
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# Prometheus.expose_metric(...) |
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type = Collector === Prometheus.Counter ? "counter" : "gauge" |
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@test sprint(Prometheus.expose_metric, metric) == |
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sprint(Prometheus.expose_io, r) == |
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""" |
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# HELP http_requests Number of HTTP requests. |
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# TYPE http_requests $(type) |
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http_requests{endpoint="/bar/",status_code="404"} 3 |
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http_requests{endpoint="/foo/",status_code="200"} 3 |
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""" |
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end |
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@testset "Prometheus.Family{Summary}" begin |
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r = Prometheus.CollectorRegistry() |
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c = Prometheus.Family{Prometheus.Summary}( |
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r, "http_request_time", "Time to process requests.", |
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["endpoint", "status_code"], |
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) |
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@test c in r.collectors |
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@test length(c.children) == 0 |
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# Prometheus.inc(...) |
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l1 = ["/foo/", "200"] |
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l2 = ["/bar/", "404"] |
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@test Prometheus.labels(c, l1) === Prometheus.labels(c, l1) |
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@test Prometheus.labels(c, l2) === Prometheus.labels(c, l2) |
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@test length(c.children) == 2 |
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@test Prometheus.labels(c, l1)._count == 0 |
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@test Prometheus.labels(c, l1)._sum == 0 |
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@test Prometheus.labels(c, l2)._count == 0 |
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@test Prometheus.labels(c, l2)._sum == 0 |
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Prometheus.observe(Prometheus.labels(c, l1), 1.2) |
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Prometheus.observe(Prometheus.labels(c, l2), 2.1) |
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@test Prometheus.labels(c, l1)._count == 1 |
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@test Prometheus.labels(c, l1)._sum == 1.2 |
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@test Prometheus.labels(c, l2)._count == 1 |
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@test Prometheus.labels(c, l2)._sum == 2.1 |
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Prometheus.observe(Prometheus.labels(c, l1), 3.4) |
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Prometheus.observe(Prometheus.labels(c, l2), 4.3) |
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@test Prometheus.labels(c, l1)._count == 2 |
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@test Prometheus.labels(c, l1)._sum == 4.6 |
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@test Prometheus.labels(c, l2)._count == 2 |
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@test Prometheus.labels(c, l2)._sum == 6.4 |
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# Prometheus.collect(...) |
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metrics = Prometheus.collect(c) |
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@test length(metrics) == 1 |
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metric = metrics[1] |
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@test metric.metric_name == c.metric_name |
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@test metric.help == c.help |
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@test length(metric.samples) == 4 |
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s1, s2, s3, s4 = metric.samples |
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@test s1.labels.labelvalues == s2.labels.labelvalues == ["/bar/", "404"] |
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@test s3.labels.labelvalues == s4.labels.labelvalues == ["/foo/", "200"] |
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@test s1.value == 2 # _count |
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@test s2.value == 6.4 # _sum |
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@test s3.value == 2 # _count |
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@test s4.value == 4.6 # _sum |
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# Prometheus.expose_metric(...) |
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@test sprint(Prometheus.expose_metric, metric) == |
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sprint(Prometheus.expose_io, r) == |
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""" |
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# HELP http_request_time Time to process requests. |
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# TYPE http_request_time summary |
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http_request_time_count{endpoint="/bar/",status_code="404"} 2 |
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http_request_time_sum{endpoint="/bar/",status_code="404"} 6.4 |
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http_request_time_count{endpoint="/foo/",status_code="200"} 2 |
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http_request_time_sum{endpoint="/foo/",status_code="200"} 4.6 |
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""" |
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end |
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@testset "Prometheus.GCCollector" begin |
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r = Prometheus.CollectorRegistry() |
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c = Prometheus.GCCollector(r) |
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@test c in r.collectors |
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# Record before and after stats and test that the metrics are in between |
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old_stats = Base.gc_num() |
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x = zeros(1024^2); x = nothing; GC.gc(); GC.gc() |
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metrics = Prometheus.collect(c) |
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x = zeros(1024^2); x = nothing; GC.gc(); GC.gc() |
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new_stats = Base.gc_num() |
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@test length(metrics) == 6 |
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gc_alloc_total = metrics[findfirst(x -> x.metric_name == "gc_alloc_total", metrics)] |
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@test old_stats.bigalloc <= gc_alloc_total.samples[1].value <= new_stats.bigalloc |
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@test old_stats.malloc <= gc_alloc_total.samples[2].value <= new_stats.malloc |
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@test old_stats.poolalloc <= gc_alloc_total.samples[3].value <= new_stats.poolalloc |
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@test old_stats.realloc <= gc_alloc_total.samples[4].value <= new_stats.realloc |
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gc_free_total = metrics[findfirst(x -> x.metric_name == "gc_free_total", metrics)] |
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@test old_stats.freecall <= gc_free_total.samples.value <= new_stats.freecall |
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gc_alloc_bytes_total = metrics[findfirst(x -> x.metric_name == "gc_alloc_bytes_total", metrics)] |
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@test Base.gc_total_bytes(old_stats) <= gc_alloc_bytes_total.samples.value <= Base.gc_total_bytes(new_stats) |
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gc_seconds_total = metrics[findfirst(x -> x.metric_name == "gc_seconds_total", metrics)] |
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@test old_stats.total_time / 10^9 <= gc_seconds_total.samples.value <= new_stats.total_time / 10^9 |
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# Prometheus.expose_metric(...) |
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str = sprint(Prometheus.expose_metric, gc_alloc_total) |
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@test occursin( |
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r""" |
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# HELP gc_alloc_total Total number of allocations \(calls to malloc, realloc, etc\) |
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# TYPE gc_alloc_total counter |
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gc_alloc_total{type="bigalloc"} \d+ |
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gc_alloc_total{type="malloc"} \d+ |
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gc_alloc_total{type="poolalloc"} \d+ |
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gc_alloc_total{type="realloc"} \d+ |
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""", |
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sprint(Prometheus.expose_metric, gc_alloc_total), |
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) |
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end |
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@testset "Prometheus.expose(::Union{String, IO})" begin |
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r = Prometheus.DEFAULT_REGISTRY |
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empty!(r.collectors) |
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Prometheus.inc(Prometheus.Counter(r, "prom_counter", "Counting things")) |
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Prometheus.set(Prometheus.Gauge(r, "prom_gauge", "Gauging things"), 1.2) |
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mktempdir() do dir |
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default = joinpath(dir, "default.prom") |
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Prometheus.expose(default) |
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reg = joinpath(dir, "reg.prom") |
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Prometheus.expose(reg, r) |
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default_io = IOBuffer() |
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Prometheus.expose(default_io) |
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reg_io = IOBuffer() |
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Prometheus.expose(reg_io, r) |
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@test read(default, String) == |
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read(reg, String) == |
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String(take!(default_io)) == |
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String(take!(reg_io)) == |
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""" |
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# HELP prom_counter Counting things |
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# TYPE prom_counter counter |
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prom_counter 1 |
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# HELP prom_gauge Gauging things |
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# TYPE prom_gauge gauge |
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prom_gauge 1.2 |
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""" |
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end |
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end |
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@testset "Prometheus.expose(::HTTP.Stream)" begin |
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empty!(Prometheus.DEFAULT_REGISTRY.collectors) |
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Prometheus.inc(Prometheus.Counter("prom_counter", "Counting things")) |
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Prometheus.set(Prometheus.Gauge("prom_gauge", "Gauging things"), 1.2) |
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iob = IOBuffer() |
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Prometheus.expose(iob) |
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reference_output = String(take!(iob)) |
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# Spin up the server |
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server = HTTP.listen!(8123) do http |
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if http.message.target == "/metrics/default" |
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return Prometheus.expose(http) |
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elseif http.message.target == "/metrics/reg" |
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return Prometheus.expose(http, Prometheus.DEFAULT_REGISTRY) |
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elseif http.message.target == "/metrics/nogzip" |
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return Prometheus.expose(http; compress=false) |
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else |
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HTTP.setstatus(http, 404) |
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HTTP.startwrite(http) |
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end |
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end |
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# Normal requests |
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r_default = HTTP.request("GET", "http://localhost:8123/metrics/default") |
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r_ref = HTTP.request("GET", "http://localhost:8123/metrics/reg") |
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@test String(r_default.body) == String(r_ref.body) == reference_output |
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# HEAD |
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@test isempty(HTTP.request("HEAD", "http://localhost:8123/metrics/default").body) |
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# POST (no filtering in the server above) |
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r_post = HTTP.request("POST", "http://localhost:8123/metrics/default") |
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@test String(r_post.body) == reference_output |
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# Bad URI |
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r_bad = HTTP.request("GET", "http://localhost:8123"; status_exception=false) |
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@test r_bad.status == 404 |
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# Compression |
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for enc in ("gzip", "br, compress, gzip", "br;q=1.0, gzip;q=0.8, *;q=0.1") |
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r_gzip = HTTP.request( |
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"GET", "http://localhost:8123/metrics/default", ["Accept-Encoding" => enc] |
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) |
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@test HTTP.header(r_gzip, "Content-Encoding") == "gzip" |
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@test String(r_gzip.body) == reference_output # HTTP.jl decompresses gzip |
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r_nogzip = HTTP.request( |
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"GET", "http://localhost:8123/metrics/nogzip", ["Accept-Encoding" => enc] |
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) |
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@test HTTP.header(r_nogzip, "Content-Encoding") != "gzip" |
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@test String(r_nogzip.body) == reference_output # HTTP.jl decompresses gzip |
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end |
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# Clean up |
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close(server) |
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wait(server) |
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end |
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@testset "Utilities" begin |
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@test_throws Prometheus.PrometheusUnreachable Prometheus.unreachable() |
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@test_throws Prometheus.PrometheusAssert Prometheus.@assert false |
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@test_throws Prometheus.PrometheusUnreachable Prometheus.prometheus_type(Int) |
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end
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