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|
# frozen_string_literal: true
require 'spec_helper'
RSpec.describe Gitlab::Metrics::Exporter::BaseExporter do
let(:settings) { double('settings') }
let(:exporter) { described_class.new(settings) }
let(:log_filename) { File.join(Rails.root, 'log', 'sidekiq_exporter.log') }
before do
allow_any_instance_of(described_class).to receive(:log_filename).and_return(log_filename)
allow_any_instance_of(described_class).to receive(:settings).and_return(settings)
end
describe 'when exporter is enabled' do
before do
allow(::WEBrick::HTTPServer).to receive(:new).with(
Port: anything,
BindAddress: anything,
Logger: anything,
AccessLog: anything
).and_call_original
allow(settings).to receive(:enabled).and_return(true)
allow(settings).to receive(:port).and_return(0)
allow(settings).to receive(:address).and_return('127.0.0.1')
end
after do
exporter.stop
end
describe 'when exporter is stopped' do
describe '#start' do
it 'starts the exporter' do
expect_any_instance_of(::WEBrick::HTTPServer).to receive(:start)
expect { exporter.start.join }.to change { exporter.thread? }.from(false).to(true)
end
describe 'with custom settings' do
let(:port) { 99999 }
let(:address) { 'sidekiq_exporter_address' }
before do
allow(settings).to receive(:port).and_return(port)
allow(settings).to receive(:address).and_return(address)
end
it 'starts server with port and address from settings' do
expect(::WEBrick::HTTPServer).to receive(:new).with(
Port: port,
BindAddress: address,
Logger: anything,
AccessLog: anything
).and_wrap_original do |m, *args|
m.call(DoNotListen: true, Logger: args.first[:Logger])
end
allow_any_instance_of(::WEBrick::HTTPServer).to receive(:start)
exporter.start.join
end
end
describe 'when thread is not alive' do
it 'does close listeners' do
expect_any_instance_of(::WEBrick::HTTPServer).to receive(:start)
expect_any_instance_of(::WEBrick::HTTPServer).to receive(:listeners)
.and_call_original
expect { exporter.start.join }.to change { exporter.thread? }.from(false).to(true)
exporter.stop
end
end
end
describe '#stop' do
it "doesn't shutdown stopped server" do
expect_any_instance_of(::WEBrick::HTTPServer).not_to receive(:shutdown)
expect { exporter.stop }.not_to change { exporter.thread? }
end
end
end
describe 'when exporter is running' do
before do
exporter.start
end
describe '#start' do
it "doesn't start running server" do
expect_any_instance_of(::WEBrick::HTTPServer).not_to receive(:start)
expect { exporter.start }.not_to change { exporter.thread? }
end
end
describe '#stop' do
it 'shutdowns server' do
expect_any_instance_of(::WEBrick::HTTPServer).to receive(:shutdown)
expect { exporter.stop }.to change { exporter.thread? }.from(true).to(false)
end
end
end
end
describe 'request handling' do
using RSpec::Parameterized::TableSyntax
where(:method_class, :path, :http_status) do
Net::HTTP::Get | '/metrics' | 200
Net::HTTP::Get | '/liveness' | 200
Net::HTTP::Get | '/readiness' | 200
Net::HTTP::Get | '/' | 404
end
before do
allow(settings).to receive(:enabled).and_return(true)
allow(settings).to receive(:port).and_return(0)
allow(settings).to receive(:address).and_return('127.0.0.1')
# We want to wrap original method
# and run handling of requests
# in separate thread
allow_any_instance_of(::WEBrick::HTTPServer)
.to receive(:start).and_wrap_original do |m, *args|
Thread.new do
m.call(*args)
rescue IOError
# is raised as we close listeners
end
end
exporter.start.join
end
after do
exporter.stop
end
with_them do
let(:config) { exporter.server.config }
let(:request) { method_class.new(path) }
it 'responds with proper http_status' do
http = Net::HTTP.new(config[:BindAddress], config[:Port])
response = http.request(request)
expect(response.code).to eq(http_status.to_s)
end
end
end
describe 'when exporter is disabled' do
before do
allow(settings).to receive(:enabled).and_return(false)
end
describe '#start' do
it "doesn't start" do
expect_any_instance_of(::WEBrick::HTTPServer).not_to receive(:start)
expect(exporter.start).to be_nil
expect { exporter.start }.not_to change { exporter.thread? }
end
end
describe '#stop' do
it "doesn't shutdown" do
expect_any_instance_of(::WEBrick::HTTPServer).not_to receive(:shutdown)
expect { exporter.stop }.not_to change { exporter.thread? }
end
end
end
end
|
