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# frozen_string_literal: true
require 'spec_helper'
RSpec.describe LimitedCapacity::Worker, :clean_gitlab_redis_queues, :aggregate_failures do
let(:worker_class) do
Class.new do
def self.name
'DummyWorker'
end
include ApplicationWorker
include LimitedCapacity::Worker
end
end
let(:worker) { worker_class.new }
let(:job_tracker) do
LimitedCapacity::JobTracker.new(worker_class.name)
end
before do
worker.jid = 'my-jid'
allow(worker).to receive(:job_tracker).and_return(job_tracker)
end
describe 'required methods' do
it { expect { worker.perform_work }.to raise_error(NotImplementedError) }
it { expect { worker.remaining_work_count }.to raise_error(NotImplementedError) }
it { expect { worker.max_running_jobs }.to raise_error(NotImplementedError) }
end
describe 'Sidekiq options' do
it 'does not retry failed jobs' do
expect(worker_class.sidekiq_options['retry']).to eq(0)
end
it 'does not deduplicate jobs' do
expect(worker_class.get_deduplicate_strategy).to eq(:none)
end
end
describe '.perform_with_capacity' do
subject(:perform_with_capacity) { worker_class.perform_with_capacity(:arg) }
before do
expect_next_instance_of(worker_class) do |instance|
expect(instance).to receive(:remove_failed_jobs)
expect(instance).to receive(:report_prometheus_metrics)
allow(instance).to receive(:remaining_work_count).and_return(remaining_work_count)
allow(instance).to receive(:remaining_capacity).and_return(remaining_capacity)
end
end
context 'when capacity is larger than work' do
let(:remaining_work_count) { 2 }
let(:remaining_capacity) { 3 }
it 'enqueues jobs for remaining work' do
expect(worker_class)
.to receive(:bulk_perform_async)
.with([[:arg], [:arg]])
perform_with_capacity
end
end
context 'when capacity is lower than work' do
let(:remaining_work_count) { 5 }
let(:remaining_capacity) { 3 }
it 'enqueues jobs for remaining work' do
expect(worker_class)
.to receive(:bulk_perform_async)
.with([[:arg], [:arg], [:arg]])
perform_with_capacity
end
end
end
describe '#perform' do
subject(:perform) { worker.perform(:arg) }
context 'with capacity' do
before do
allow(worker).to receive(:max_running_jobs).and_return(10)
allow(worker).to receive(:running_jobs_count).and_return(0)
allow(worker).to receive(:remaining_work_count).and_return(0)
end
it 'calls perform_work' do
expect(worker).to receive(:perform_work).with(:arg)
perform
end
it 're-enqueues itself' do
allow(worker).to receive(:perform_work)
expect(worker).to receive(:re_enqueue).with(:arg)
perform
end
it 'registers itself in the running set' do
allow(worker).to receive(:perform_work)
expect(job_tracker).to receive(:register).with('my-jid')
perform
end
it 'removes itself from the running set' do
expect(job_tracker).to receive(:remove).with('my-jid')
allow(worker).to receive(:perform_work)
perform
end
it 'reports prometheus metrics' do
allow(worker).to receive(:perform_work)
expect(worker).to receive(:report_prometheus_metrics)
perform
end
end
context 'with capacity and without work' do
before do
allow(worker).to receive(:max_running_jobs).and_return(10)
allow(worker).to receive(:running_jobs_count).and_return(0)
allow(worker).to receive(:remaining_work_count).and_return(0)
allow(worker).to receive(:perform_work)
end
it 'does not re-enqueue itself' do
expect(worker_class).not_to receive(:perform_async)
perform
end
end
context 'without capacity' do
before do
allow(worker).to receive(:max_running_jobs).and_return(10)
allow(worker).to receive(:running_jobs_count).and_return(15)
allow(worker).to receive(:remaining_work_count).and_return(10)
end
it 'does not call perform_work' do
expect(worker).not_to receive(:perform_work)
perform
end
it 'does not re-enqueue itself' do
expect(worker_class).not_to receive(:perform_async)
perform
end
it 'does not register in the running set' do
expect(job_tracker).not_to receive(:register)
perform
end
it 'removes itself from the running set' do
expect(job_tracker).to receive(:remove).with('my-jid')
perform
end
it 'reports prometheus metrics' do
expect(worker).to receive(:report_prometheus_metrics)
perform
end
end
context 'when perform_work fails' do
it 'does not re-enqueue itself' do
expect(worker).not_to receive(:re_enqueue)
expect { perform }.to raise_error(NotImplementedError)
end
it 'removes itself from the running set' do
expect(job_tracker).to receive(:remove)
expect { perform }.to raise_error(NotImplementedError)
end
it 'reports prometheus metrics' do
expect(worker).to receive(:report_prometheus_metrics)
expect { perform }.to raise_error(NotImplementedError)
end
end
end
describe '#remaining_capacity' do
subject(:remaining_capacity) { worker.remaining_capacity }
before do
expect(worker).to receive(:max_running_jobs).and_return(max_capacity)
end
context 'when changing the capacity to a lower value' do
let(:max_capacity) { -1 }
it { expect(remaining_capacity).to eq(0) }
end
context 'when registering new jobs' do
let(:max_capacity) { 2 }
before do
job_tracker.register('a-job-id')
end
it { expect(remaining_capacity).to eq(1) }
end
context 'with jobs in the queue' do
let(:max_capacity) { 2 }
before do
expect(worker_class).to receive(:queue_size).and_return(1)
end
it { expect(remaining_capacity).to eq(1) }
end
context 'with both running jobs and queued jobs' do
let(:max_capacity) { 10 }
before do
expect(worker_class).to receive(:queue_size).and_return(5)
expect(worker).to receive(:running_jobs_count).and_return(3)
end
it { expect(remaining_capacity).to eq(2) }
end
end
describe '#remove_failed_jobs' do
subject(:remove_failed_jobs) { worker.remove_failed_jobs }
before do
job_tracker.register('a-job-id')
allow(worker).to receive(:max_running_jobs).and_return(2)
expect(job_tracker).to receive(:clean_up).and_call_original
end
context 'with failed jobs' do
it 'update the available capacity' do
expect { remove_failed_jobs }.to change { worker.remaining_capacity }.by(1)
end
end
end
describe '#report_prometheus_metrics' do
subject(:report_prometheus_metrics) { worker.report_prometheus_metrics }
before do
allow(worker).to receive(:running_jobs_count).and_return(5)
allow(worker).to receive(:max_running_jobs).and_return(7)
allow(worker).to receive(:remaining_work_count).and_return(9)
end
it 'reports number of running jobs' do
labels = { worker: 'DummyWorker' }
report_prometheus_metrics
expect(Gitlab::Metrics.registry.get(:limited_capacity_worker_running_jobs).get(labels)).to eq(5)
expect(Gitlab::Metrics.registry.get(:limited_capacity_worker_max_running_jobs).get(labels)).to eq(7)
expect(Gitlab::Metrics.registry.get(:limited_capacity_worker_remaining_work_count).get(labels)).to eq(9)
end
end
end
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