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require 'spec_helper'
describe Gitlab::SidekiqMiddleware::Shutdown do
subject { described_class.new }
let(:pid) { Process.pid }
let(:worker) { double(:worker, class: 'TestWorker') }
let(:job) { { 'jid' => 123 } }
let(:queue) { 'test_queue' }
let(:block) { proc { nil } }
def run
subject.call(worker, job, queue) { block.call }
described_class.shutdown_thread&.join
end
def pop_trace
subject.trace.pop(true)
end
before do
allow(subject).to receive(:get_rss).and_return(10.kilobytes)
described_class.clear_shutdown_thread
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
def expect_shutdown_sequence
expect(pop_trace).to eq([:sleep, 15 * 60])
expect(pop_trace).to eq([:kill, 'SIGTSTP', pid])
expect(pop_trace).to eq([:sleep, 30])
expect(pop_trace).to eq([:kill, 'SIGTERM', pid])
expect(pop_trace).to eq([:sleep, 10])
expect(pop_trace).to eq([:kill, 'SIGKILL', pid])
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
run
expect_shutdown_sequence
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
context 'when WantShutdown is raised' do
let(:block) { proc { raise described_class::WantShutdown } }
it 'starts the shutdown sequence and re-raises the exception' do
expect { run }.to raise_exception(described_class::WantShutdown)
# We can't expect 'run' to have joined on the shutdown thread, because
# it hit an exception.
shutdown_thread = described_class.shutdown_thread
expect(shutdown_thread).not_to be_nil
shutdown_thread.join
expect_shutdown_sequence
end
end
end
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