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Contents
require 'rails_helper'
require 'prometheus/client'
describe LHC::Prometheus do
before(:each) do
LHC.config.interceptors = [LHC::Prometheus]
LHC::Prometheus.client = Prometheus::Client
LHC::Prometheus.namespace = 'test_app'
stub_request(:get, 'http://local.ch')
expect(Prometheus::Client).to receive(:registry).and_call_original.at_least(:once)
end
let(:client) { double("prometheus/client") }
context 'registering' do
it 'creates a counter and histogram registry in the prometheus client' do
expect(Prometheus::Client.registry).to receive(:counter).and_call_original.once
.with(:test_app_lhc_requests, 'Counter of all LHC requests.')
expect(Prometheus::Client.registry).to receive(:histogram).and_call_original.once
.with(:test_app_lhc_times, 'Times for all LHC requests.')
LHC.get('http://local.ch')
LHC.get('http://local.ch') # second request, registration should happen only once
end
end
context 'logging' do
let(:requests_registry_double) { double('requests_registry_double') }
let(:times_registry_double) { double('times_registry_double') }
it 'logs monitoring information to the created registries' do
expect(Prometheus::Client.registry).to receive(:get).and_return(requests_registry_double).once
.with(:test_app_lhc_requests)
expect(Prometheus::Client.registry).to receive(:get).and_return(times_registry_double).once
.with(:test_app_lhc_times)
expect(requests_registry_double).to receive(:increment).once
.with(
code: 200,
success: true,
timeout: false
)
expect(times_registry_double).to receive(:observe).once
.with({}, 0)
LHC.get('http://local.ch')
end
end
end
Version data entries
39 entries across 39 versions & 1 rubygems