# frozen_string_literal: true require_relative "test_helper" require "prometheus_exporter/client" class PrometheusExporterTest < Minitest::Test def test_find_the_correct_registered_metric client = PrometheusExporter::Client.new # register a metrics for testing counter_metric = client.register(:counter, 'counter_metric', 'helping') # when the given name doesn't match any existing metric, it returns nil result = client.find_registered_metric('not_registered') assert_nil(result) # when the given name matches an existing metric, it returns this metric result = client.find_registered_metric('counter_metric') assert_equal(counter_metric, result) # when the given name matches an existing metric, but the given type doesn't, it returns nil result = client.find_registered_metric('counter_metric', type: :gauge) assert_nil(result) # when the given name and type match an existing metric, it returns the metric result = client.find_registered_metric('counter_metric', type: :counter) assert_equal(counter_metric, result) # when the given name matches an existing metric, but the given help doesn't, it returns nil result = client.find_registered_metric('counter_metric', help: 'not helping') assert_nil(result) # when the given name and help match an existing metric, it returns the metric result = client.find_registered_metric('counter_metric', help: 'helping') assert_equal(counter_metric, result) # when the given name matches an existing metric, but the given help and type don't, it returns nil result = client.find_registered_metric('counter_metric', type: :gauge, help: 'not helping') assert_nil(result) # when the given name, type, and help all match an existing metric, it returns the metric result = client.find_registered_metric('counter_metric', type: :counter, help: 'helping') assert_equal(counter_metric, result) end def test_standard_values client = PrometheusExporter::Client.new counter_metric = client.register(:counter, 'counter_metric', 'helping') assert_equal(false, counter_metric.standard_values('value', 'key').has_key?(:opts)) expected_quantiles = { quantiles: [0.99, 9] } summary_metric = client.register(:summary, 'summary_metric', 'helping', expected_quantiles) assert_equal(expected_quantiles, summary_metric.standard_values('value', 'key')[:opts]) end def test_overriding_logger logs = StringIO.new logger = Logger.new(logs) logger.level = :warn client = PrometheusExporter::Client.new(logger: logger, max_queue_size: 1) client.send("put a message in the queue") client.send("put a second message in the queue to trigger the logger") assert_includes(logs.string, "dropping message cause queue is full") end end