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require 'spec_helper'
describe Gitlab::SidekiqMiddleware::MemoryKiller do
subject { described_class.new }
let(:pid) { 999 }
let(:worker) { double(:worker, class: 'TestWorker') }
let(:job) { { 'jid' => 123 } }
let(:queue) { 'test_queue' }
def run
thread = subject.call(worker, job, queue) { nil }
thread&.join
end
before do
allow(subject).to receive(:get_rss).and_return(10.kilobytes)
allow(subject).to receive(:pid).and_return(pid)
end
context 'when MAX_RSS is set to 0' do
before do
stub_const("#{described_class}::MAX_RSS", 0)
end
it 'does nothing' do
expect(subject).not_to receive(:sleep)
run
end
end
context 'when MAX_RSS is exceeded' do
before do
stub_const("#{described_class}::MAX_RSS", 5.kilobytes)
end
it 'sends the TSTP, TERM and KILL signals at expected times' do
expect(subject).to receive(:sleep).with(15 * 60).ordered
expect(Process).to receive(:kill).with('SIGTSTP', pid).ordered
expect(subject).to receive(:sleep).with(30).ordered
expect(Process).to receive(:kill).with('SIGTERM', pid).ordered
expect(subject).to receive(:sleep).with(10).ordered
expect(Process).to receive(:kill).with('SIGKILL', pid).ordered
run
end
it 'sends TSTP and TERM to the pid, but KILL to the pgroup, when running as process leader' do
allow(Process).to receive(:getpgrp) { pid }
allow(subject).to receive(:sleep)
expect(Process).to receive(:kill).with('SIGTSTP', pid).ordered
expect(Process).to receive(:kill).with('SIGTERM', pid).ordered
expect(Process).to receive(:kill).with('SIGKILL', 0).ordered
run
end
end
context 'when MAX_RSS is not exceeded' do
before do
stub_const("#{described_class}::MAX_RSS", 15.kilobytes)
end
it 'does nothing' do
expect(subject).not_to receive(:sleep)
run
end
end
end
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