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require 'spec_helper'
describe Gitlab::Metrics::Samplers::UnicornSampler do
subject { described_class.new(1.second) }
describe '#sample' do
let(:unicorn) { double('unicorn') }
let(:raindrops) { double('raindrops') }
let(:stats) { double('stats') }
before do
stub_const('Unicorn', unicorn)
stub_const('Raindrops::Linux', raindrops)
allow(raindrops).to receive(:unix_listener_stats).and_return({})
allow(raindrops).to receive(:tcp_listener_stats).and_return({})
end
context 'unicorn listens on unix sockets' do
let(:socket_address) { '/some/sock' }
let(:sockets) { [socket_address] }
before do
allow(unicorn).to receive(:listener_names).and_return(sockets)
end
it 'samples socket data' do
expect(raindrops).to receive(:unix_listener_stats).with(sockets)
subject.sample
end
context 'stats collected' do
before do
allow(stats).to receive(:active).and_return('active')
allow(stats).to receive(:queued).and_return('queued')
allow(raindrops).to receive(:unix_listener_stats).and_return({ socket_address => stats })
end
it 'updates metrics type unix and with addr' do
labels = { socket_type: 'unix', socket_address: socket_address }
expect(subject.metrics[:unicorn_active_connections]).to receive(:set).with(labels, 'active')
expect(subject.metrics[:unicorn_queued_connections]).to receive(:set).with(labels, 'queued')
subject.sample
end
end
end
context 'unicorn listens on tcp sockets' do
let(:tcp_socket_address) { '0.0.0.0:8080' }
let(:tcp_sockets) { [tcp_socket_address] }
before do
allow(unicorn).to receive(:listener_names).and_return(tcp_sockets)
end
it 'samples socket data' do
expect(raindrops).to receive(:tcp_listener_stats).with(tcp_sockets)
subject.sample
end
context 'stats collected' do
before do
allow(stats).to receive(:active).and_return('active')
allow(stats).to receive(:queued).and_return('queued')
allow(raindrops).to receive(:tcp_listener_stats).and_return({ tcp_socket_address => stats })
end
it 'updates metrics type unix and with addr' do
labels = { socket_type: 'tcp', socket_address: tcp_socket_address }
expect(subject.metrics[:unicorn_active_connections]).to receive(:set).with(labels, 'active')
expect(subject.metrics[:unicorn_queued_connections]).to receive(:set).with(labels, 'queued')
subject.sample
end
end
end
context 'additional metrics' do
let(:unicorn_workers) { 2 }
before do
allow(unicorn).to receive(:listener_names).and_return([""])
allow(::Gitlab::Metrics::System).to receive(:cpu_time).and_return(3.14)
allow(subject).to receive(:unicorn_workers_count).and_return(unicorn_workers)
end
it "sets additional metrics" do
expect(subject.metrics[:unicorn_workers]).to receive(:set).with({}, unicorn_workers)
subject.sample
end
end
end
describe '#start' do
context 'when enabled' do
before do
allow(subject).to receive(:enabled?).and_return(true)
end
it 'creates new thread' do
expect(Thread).to receive(:new)
subject.start
end
end
context 'when disabled' do
before do
allow(subject).to receive(:enabled?).and_return(false)
end
it "doesn't create new thread" do
expect(Thread).not_to receive(:new)
subject.start
end
end
end
end
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