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https://github.com/clusterio/clusterio.git
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Hornwitser
8229d1955c
Skip Prometheus client tests that assume the environment is isolated from the rest of the tests.
570 lines
17 KiB
JavaScript
570 lines
17 KiB
JavaScript
const assert = require('assert').strict;
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const prometheus = require('lib/prometheus');
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describe("lib/prometheus", function() {
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describe("class CollectorRegistry", function() {
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let registry;
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beforeEach(function() {
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registry = new prometheus.CollectorRegistry();
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})
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describe(".register()", function() {
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it("should register a collector", function() {
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let collector = new prometheus.Collector(false);
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registry.register(collector);
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assert(
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registry.collectors.includes(collector),
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"Collector was not registered"
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);
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});
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it("should throw when already registered", function() {
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let collector = new prometheus.Collector(false);
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registry.register(collector);
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assert.throws(
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() => registry.register(collector),
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new Error("Collector is already registered in this registry.")
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);
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});
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it("should allow being regitstered in another register", function() {
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let otherCollectorRegistry = new prometheus.CollectorRegistry();
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let collector = new prometheus.Collector(false);
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registry.register(collector);
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otherCollectorRegistry.register(collector);
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assert(
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registry.collectors.includes(collector),
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"Collector was not registered in first register"
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);
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assert(
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otherCollectorRegistry.collectors.includes(collector),
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"Collector was not registered in second register"
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);
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});
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});
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describe(".unregister()", function() {
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it("should removed a registered collector", function() {
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let collector = new prometheus.Collector(false);
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registry.register(collector);
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registry.unregister(collector);
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assert(
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!registry.collectors.includes(collector),
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"Collector was not removed"
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);
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});
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it("should throw when not registered", function() {
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let collector = new prometheus.Collector(false);
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assert.throws(
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() => registry.unregister(collector),
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new Error("Collector is not registered in this registry.")
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);
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});
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});
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describe("defaultRegistry", function() {
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it("should have collectors registered to it by default", function() {
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let collector = new prometheus.Collector();
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assert(
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prometheus.defaultRegistry.collectors.includes(collector),
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"collector was not registered to defaultRegistry"
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);
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prometheus.defaultRegistry.unregister(collector);
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});
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it("should have the default collectors registered to it", function() {
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let collectors = Object.entries(prometheus.defaultCollectors);
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for (let [name, collector] of collectors) {
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assert(
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prometheus.defaultRegistry.collectors.includes(collector),
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`${name} is not registered`
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);
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}
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});
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it("should allow default collectors to be unregistered", function() {
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this.skip(); // XXX Doesn't work in Clusterio's shared testing env
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let collectors = Object.values(prometheus.defaultCollectors);
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for (let collector of collectors) {
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prometheus.defaultRegistry.unregister(collector);
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}
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assert(
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prometheus.defaultRegistry.collectors.length == 0,
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"Collectors left over after removing the default ones"
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);
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});
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});
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});
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describe("class Collector", function() {
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it("should implement .collect()", async function() {
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let collector = new prometheus.Collector(false);
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for await (let result of collector.collect()) {
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assert.fail("Should not return any results");
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}
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});
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});
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describe("class Counter", function() {
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let counter;
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beforeEach(function() {
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counter = new prometheus.Counter('test', "Help", { register: false });
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});
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describe("constructor", function() {
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it("should be initialized to 0", function() {
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assert.equal(counter._values.get(''), 0);
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});
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});
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describe(".inc()", function() {
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it("should increment the counter by 1 by default", function() {
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counter.inc();
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assert.equal(counter._values.get(''), 1);
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});
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it("should increment the counter by specified value", function() {
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counter.inc(3.2);
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assert.equal(counter._values.get(''), 3.2);
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});
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it("should throw if value is negative", function() {
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assert.throws(
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() => counter.inc(-1),
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new Error("Expected value to be a positive number")
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);
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});
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it("should throw if value is negative infinity", function() {
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assert.throws(
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() => counter.inc(-Infinity),
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new Error("Expected value to be a positive number")
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);
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});
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it("should throw if value is NaN", function() {
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assert.throws(
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() => counter.inc(NaN),
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new Error("Expected value to be a positive number")
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);
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});
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});
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});
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describe("class Gauge", function() {
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let gauge;
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beforeEach(function() {
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gauge = new prometheus.Gauge('test', "Help", { register: false });
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});
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describe("constructor", function() {
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it("should be initialized to 0", function() {
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assert.equal(gauge._values.get(''), 0);
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});
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});
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describe(".inc()", function() {
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it("should increment the gauge by 1 by default", function() {
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gauge.inc();
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assert.equal(gauge._values.get(''), 1);
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});
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it("should increment the gauge by specified value", function() {
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gauge.inc(3.2);
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assert.equal(gauge._values.get(''), 3.2);
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});
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it("should decrement on negative value", function() {
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gauge.inc(-2);
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assert.equal(gauge._values.get(''), -2);
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});
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});
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describe(".dec()", function() {
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it("should decrement the gauge by 1 by default", function() {
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gauge.dec();
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assert.equal(gauge._values.get(''), -1);
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});
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it("should decrement the gauge by specified value", function() {
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gauge.dec(3.2);
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assert.equal(gauge._values.get(''), -3.2);
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});
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it("should increment on negative value", function() {
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gauge.dec(-2);
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assert.equal(gauge._values.get(''), 2);
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});
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});
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describe(".set()", function() {
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it("should set the gauge to the specified value", function() {
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gauge.set(7);
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assert.equal(gauge._values.get(''), 7);
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});
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});
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describe(".setToCurrentTime()", function() {
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it("should set the gauge to current unix time in seconds", function() {
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gauge.setToCurrentTime();
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assert(
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Math.abs(gauge._values.get('') - Date.now() / 1000) < 1,
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"value set is not close to the current unix time"
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);
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});
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});
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});
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describe("class ValueCollector", function() {
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describe("constructor", function() {
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it("should throw on invalid metric name", function() {
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for (let name of ["", " ", "0a", "$a"]) {
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assert.throws(
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() => new prometheus.Gauge(
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name, "Help", { register: false }
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),
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new Error(`Invalid name '${name}'`)
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)
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}
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});
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it("should throw on invalid label names", function() {
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for (let name of ["", " ", "0a", "$a", "a:"]) {
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assert.throws(
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() => new prometheus.Gauge(
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'test', "Help", { register: false, labels: [name] }
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),
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new Error(`Invalid label '${name}'`)
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)
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}
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});
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it("should throw on missing name", function() {
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assert.throws(
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() => new prometheus.Gauge(),
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new Error("Expected name to be a string")
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);
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});
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it("should throw on missing help", function() {
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assert.throws(
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() => new prometheus.Gauge("test"),
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new Error("Expected help to be a string")
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);
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});
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it("should throw on unrecoginzed option", function() {
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assert.throws(
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() => new prometheus.Gauge("test", "help", { invalid: 1 }),
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new Error("Unrecognized option 'invalid'")
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);
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});
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});
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describe(".get()", function() {
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it("should return the current value", function() {
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let gauge = new prometheus.Gauge('test', "Help", { register: false });
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gauge.set(11);
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assert.equal(gauge.get(), 11);
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});
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});
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describe(".labels()", function() {
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let gauge;
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beforeEach(function() {
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gauge = new prometheus.Gauge(
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'test', "Help", { register: false, labels: ['a', 'b'] }
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);
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});
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it("should require all labels set at creation", function() {
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assert.throws(
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() => gauge.labels({a: "1"}),
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new Error("Missing label 'b'")
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);
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assert.throws(
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() => gauge.labels({b: "1"}),
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new Error("Missing label 'a'")
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);
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assert.throws(
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() => gauge.labels({a: '1', b: '2', c: '3'}),
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new Error("Extra label 'c'")
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);
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assert.throws(
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() => gauge.labels('1'),
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new Error("Missing label 'b'")
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);
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assert.throws(
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() => gauge.labels('1', '2', '3'),
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new Error("Extra positional label")
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);
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});
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it("should throw if label value is not a string", function() {
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assert.throws(
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() => gauge.labels({a: "1", b: 2}),
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new Error("Expected value for label 'b' to be a string")
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);
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assert.throws(
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() => gauge.labels("1", 2),
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new Error("Expected value for label 'b' to be a string")
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);
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});
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it("should initialize a value for the label set", function() {
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gauge.labels({ a: '1', b: '2'});
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assert(gauge._values.has('a="1",b="2"'), "value was not set");
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gauge.labels('4', '5');
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assert(gauge._values.has('a="4",b="5"'), "value was not set");
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});
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it("should return a child supporting the usual methods", function() {
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let child = gauge.labels({ a: '1', b: '2'});
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child.get();
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child.inc();
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child.dec();
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child.setToCurrentTime();
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child = gauge.labels('7', '8');
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child.get();
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child.inc();
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child.dec();
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child.setToCurrentTime();
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});
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it("should return the same child for the same labels", function() {
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let child = gauge.labels('1', '2');
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assert.equal(gauge.labels('1', '2'), child);
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});
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});
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describe(".remove()", function() {
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it("should remove a label set created with .label()", function() {
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let gauge = new prometheus.Gauge(
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'test', "Help", { register: false, labels: ['a', 'b'] }
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);
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gauge.labels({ a: '1', b: '2'});
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gauge.remove({ a: '1', b: '2'});
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assert(!gauge._values.has('a="1",b="2"'), "value was not removed");
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});
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it("should throw when removing the empty label set", function() {
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let gauge = new prometheus.Gauge('test', "Help", { register: false });
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assert.throws(
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() => gauge.remove({}), new Error("labels cannot be empty")
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);
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});
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});
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describe(".removeAll()", function() {
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it("should remove a label set created with .label()", function() {
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let gauge = new prometheus.Gauge(
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'test', "Help", { register: false, labels: ['a', 'b'] }
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);
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gauge.labels('1', '2');
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gauge.labels('1', '3');
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gauge.labels('4', '6');
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gauge.removeAll({a: '1'});
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assert(gauge._values.size <= 1, "Matching labels remained")
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assert(
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gauge._values.has('a="4",b="6"'),
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"Non-matching label was removed"
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);
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});
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it("should throw when removing the empty label set", function() {
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let gauge = new prometheus.Gauge('test', "Help", { register: false });
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assert.throws(
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() => gauge.removeAll({}), new Error("labels cannot be empty")
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);
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});
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it("should handle special characters", function() {
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let gauge = new prometheus.Gauge(
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'test', "Help", { register: false, labels: ['a', 'b'] }
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)
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gauge.labels('x\\\\\n\"\"\n\\', '2');
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gauge.removeAll({a: 'x\\\\\n\"\"\n\\'});
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assert(gauge._values.size === 0, "Matching labels remained")
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});
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});
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describe(".clear()", function() {
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it("should remove all label sets created with .label()", function() {
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let gauge = new prometheus.Gauge(
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'test', "Help", { register: false, labels: ['a', 'b'] }
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);
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gauge.labels({ a: '1', b: '2'});
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gauge.labels({ a: '3', b: '4'});
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gauge.labels({ a: '5', b: '6'});
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gauge.clear();
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assert(gauge._values.size == 0, "values was not cleared");
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});
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it("should throw when used on an unlabled metric", function() {
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let gauge = new prometheus.Gauge('test', "Help", { register: false });
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assert.throws(
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() => gauge.clear(), new Error("Cannot clear unlabeled metric")
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);
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});
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});
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});
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describe("defaultCollectors", function() {
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describe("processStartTimeSeconds", function() {
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it("should give a close point in time", async function() {
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this.skip(); // XXX Doesn't work in Clusterio's shared testing env
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let results = []
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let collector = prometheus.defaultCollectors.processStartTimeSeconds;
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for await (let result of collector.collect()) {
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results.push(result);
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}
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assert(
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results.length == 1,
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"collector did not give exactly one result"
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);
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assert(
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Math.abs(results[0].samples.get('') - Date.now() / 1000) < 1,
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"value set is not close to the current unix time"
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);
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});
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});
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describe("processCpuSecondsTotal", function() {
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it("should give a low value", async function() {
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this.skip(); // XXX Doesn't work in Clusterio's shared testing env
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let results = []
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let collector = prometheus.defaultCollectors.processCpuSecondsTotal;
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for await (let result of collector.collect()) {
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results.push(result);
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}
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assert(
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results.length == 1,
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"collector did not give exactly one result"
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);
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let value = results[0].samples.get('')
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assert(
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value < 5 && value > 0,
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`process time is not between 0 and 5 seconds (${value})`
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);
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});
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});
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});
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describe("exposition()", function() {
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it("should format simple metrics", async function() {
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let registry = new prometheus.CollectorRegistry();
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let counter = new prometheus.Counter('a', "Help", { register: false });
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registry.register(counter);
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let gauge = new prometheus.Gauge('b', "Help", { register: false });
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registry.register(gauge);
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let exposition = await prometheus.exposition(registry.collect());
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assert.equal(
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exposition,
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'# HELP a Help\n' +
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'# TYPE a counter\n' +
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'a 0\n' +
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'\n' +
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'# HELP b Help\n' +
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'# TYPE b gauge\n' +
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'b 0\n'
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);
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});
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it("should format labeled metrics", async function() {
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let registry = new prometheus.CollectorRegistry();
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let gauge = new prometheus.Gauge(
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'test', "Help", { register: false, labels: ['a', 'b']}
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);
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gauge.labels({a: '1', b: '2'});
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gauge.labels({b: 'y', a: 'x'});
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registry.register(gauge);
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let exposition = await prometheus.exposition(registry.collect());
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assert.equal(
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exposition,
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'# HELP test Help\n' +
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'# TYPE test gauge\n' +
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'test{a="1",b="2"} 0\n' +
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'test{a="x",b="y"} 0\n'
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);
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});
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it("should format Infinity and NaN", async function() {
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let registry = new prometheus.CollectorRegistry();
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let gauge = new prometheus.Gauge(
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'test', "Help", { register: false, labels: ['n']}
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);
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gauge.labels({n: '1'}).set(Infinity);
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gauge.labels({n: '2'}).set(-Infinity);
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gauge.labels({n: '3'}).set(NaN);
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registry.register(gauge);
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let exposition = await prometheus.exposition(registry.collect());
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assert.equal(
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exposition,
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'# HELP test Help\n' +
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'# TYPE test gauge\n' +
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'test{n="1"} +Inf\n' +
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'test{n="2"} -Inf\n' +
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'test{n="3"} NaN\n'
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);
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});
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});
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let serializedResult = {
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metric: { type: 'type', name: 'name', help: "Help", labels: ['a', 'b'] },
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samples: [ ['a="1",b="2"', 1], ['a="3",b="4"', 5], ]
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};
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let deserializedResult = {
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metric: new prometheus.Metric('type', 'name', "Help", ['a', 'b']),
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samples: new Map([['a="1",b="2"', 1], ['a="3",b="4"', 5]]),
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};
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describe("serializeResult()", function() {
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it("should convert a result into plain object", function() {
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assert.deepEqual(
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prometheus.serializeResult(deserializedResult),
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serializedResult
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)
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});
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it("should support adding labels", function() {
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assert.deepEqual(
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prometheus.serializeResult({
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metric: new prometheus.Metric('type', 'name', "Help"),
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samples: new Map([['', 2]]),
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}, { addLabels: { c: '8' }}),
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{
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metric: {type: 'type', name: 'name', help: "Help", labels: ['c']},
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samples: [['c="8"', 2]],
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}
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);
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assert.deepEqual(
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prometheus.serializeResult({
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metric: new prometheus.Metric('type', 'name', "Help", ['a']),
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samples: new Map([['a="4"', 3]]),
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}, { addLabels: { c: '8' }}),
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{
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metric: {type: 'type', name: 'name', help: "Help", labels: ['a', 'c']},
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samples: [['a="4",c="8"', 3]],
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}
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);
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});
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|
it("should support redefining name and help", function() {
|
|
assert.deepEqual(
|
|
prometheus.serializeResult({
|
|
metric: new prometheus.Metric('type', 'name', "Help"),
|
|
samples: new Map([['', 2]]),
|
|
}, { metricName: 'new', }),
|
|
{
|
|
metric: {type: 'type', name: 'new', help: "Help", labels: []},
|
|
samples: [['', 2]],
|
|
}
|
|
);
|
|
assert.deepEqual(
|
|
prometheus.serializeResult({
|
|
metric: new prometheus.Metric('type', 'name', "Help"),
|
|
samples: new Map([['', 2]]),
|
|
}, { metricHelp: "old", }),
|
|
{
|
|
metric: {type: 'type', name: 'name', help: "old", labels: []},
|
|
samples: [['', 2]],
|
|
}
|
|
);
|
|
});
|
|
it("should throw on unrecoginzed option", function() {
|
|
assert.throws(
|
|
() => new prometheus.serializeResult({
|
|
metric: new prometheus.Metric('type', 'name', "Help"),
|
|
samples: new Map([['', 3]]),
|
|
}, { invalid: true }),
|
|
new Error("Unrecognized option 'invalid'")
|
|
);
|
|
});
|
|
});
|
|
|
|
describe("deserializeResult()", function() {
|
|
it("should convert a plain object into a result", function() {
|
|
assert.deepEqual(
|
|
prometheus.deserializeResult(serializedResult),
|
|
deserializedResult
|
|
)
|
|
});
|
|
});
|
|
|
|
describe("post test checks", function() {
|
|
it("should not have any collectors in the default registry", function() {
|
|
this.skip(); // XXX Doesn't work in Clusterio's shared testing env
|
|
assert(
|
|
prometheus.defaultRegistry.collectors.length == 0,
|
|
"Collectors left over by test code"
|
|
);
|
|
});
|
|
});
|
|
});
|