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require_relative 'global_thread_pool_shared'
RSpec.shared_examples :executor_service do
after(:each) do
subject.shutdown
expect(subject.wait_for_termination(pool_termination_timeout)).to eq true
end
it_should_behave_like :global_thread_pool
context '#post' do
it 'rejects the block while shutting down' do
latch = Concurrent::CountDownLatch.new(1)
subject.post{ sleep(1) }
subject.shutdown
begin
subject.post{ latch.count_down }
rescue Concurrent::RejectedExecutionError
end
expect(latch.wait(0.1)).to be_falsey
end
it 'rejects the block once shutdown' do
subject.shutdown
latch = Concurrent::CountDownLatch.new(1)
begin
subject.post{ latch.count_down }
rescue Concurrent::RejectedExecutionError
end
expect(latch.wait(0.1)).to be_falsey
end
end
context 'auto terminate' do
# https://github.com/ruby-concurrency/concurrent-ruby/issues/817
# https://github.com/ruby-concurrency/concurrent-ruby/issues/839
it 'does not stop shutdown ' do
Timeout.timeout(10) do
begin
test_file = File.join File.dirname(__FILE__), 'executor_quits.rb'
pid = spawn RbConfig.ruby, test_file
Process.waitpid pid
expect($?.success?).to eq true
rescue Errno::ECHILD
# child already gone
rescue Timeout::Error => e
Process.kill :KILL, pid
raise e
end
end
end
end
context '#running?' do
it 'returns true when the thread pool is running' do
expect(subject).to be_running
end
it 'returns false when the thread pool is shutting down' do
subject.post{ sleep(0.5) }
subject.shutdown
expect(subject).not_to be_running
expect(subject.wait_for_termination(pool_termination_timeout)).to eq true
end
it 'returns false when the thread pool is shutdown' do
subject.shutdown
expect(subject.wait_for_termination(pool_termination_timeout)).to eq true
expect(subject).not_to be_running
end
it 'returns false when the thread pool is killed' do
subject.kill
expect(subject.wait_for_termination(pool_termination_timeout)).to eq true
expect(subject).not_to be_running
end
end
context '#shutdown' do
it 'stops accepting new tasks' do
latch1 = Concurrent::CountDownLatch.new(1)
latch2 = Concurrent::CountDownLatch.new(1)
subject.post{ sleep(0.1); latch1.count_down }
latch1.wait(1)
subject.shutdown
expect(subject.wait_for_termination(pool_termination_timeout)).to eq true
begin
subject.post{ latch2.count_down }
rescue Concurrent::RejectedExecutionError
end
expect(latch2.wait(0.2)).to be_falsey
end
it 'allows in-progress tasks to complete' do
latch = Concurrent::CountDownLatch.new(1)
subject.post{ sleep(0.1); latch.count_down }
subject.shutdown
expect(latch.wait(1)).to be_truthy
end
it 'allows pending tasks to complete' do
latch = Concurrent::CountDownLatch.new(2)
subject.post{ sleep(0.2); latch.count_down }
subject.post{ sleep(0.2); latch.count_down }
subject.shutdown
expect(latch.wait(1)).to be_truthy
end
end
context '#shutdown followed by #wait_for_termination' do
it 'allows in-progress tasks to complete' do
latch = Concurrent::CountDownLatch.new(1)
subject.post{ sleep(0.1); latch.count_down }
subject.shutdown
expect(subject.wait_for_termination(pool_termination_timeout)).to eq true
expect(latch.wait(1)).to be_truthy
end
it 'allows pending tasks to complete' do
q = Queue.new
5.times do |i|
subject.post { sleep 0.1; q << i }
end
subject.shutdown
expect(subject.wait_for_termination(pool_termination_timeout)).to eq true
expect(q.length).to eq 5
end
it 'stops accepting/running new tasks' do
expected = Concurrent::AtomicFixnum.new(0)
subject.post{ sleep(0.1); expected.increment }
subject.post{ sleep(0.1); expected.increment }
subject.shutdown
begin
subject.post{ expected.increment }
rescue Concurrent::RejectedExecutionError
end
expect(subject.wait_for_termination(pool_termination_timeout)).to eq true
expect(expected.value).to eq(2)
end
end
context '#kill' do
it 'stops accepting new tasks' do
expected = Concurrent::AtomicBoolean.new(false)
latch = Concurrent::CountDownLatch.new(1)
subject.post{ sleep(0.1); latch.count_down }
latch.wait(1)
subject.kill
begin
subject.post{ expected.make_true }
rescue Concurrent::RejectedExecutionError
end
sleep(0.1)
expect(expected.value).to be_falsey
end
it 'rejects all pending tasks' do
subject.post{ sleep(1) }
sleep(0.1)
subject.kill
sleep(0.1)
begin
expect(subject.post{ nil }).to be_falsey
rescue Concurrent::RejectedExecutionError
end
end
end
context '#wait_for_termination' do
it 'immediately returns true when no operations are pending' do
subject.shutdown
expect(subject.wait_for_termination(0)).to be_truthy
end
it 'returns true after shutdown has complete' do
10.times { subject << proc{ nil } }
sleep(0.1)
subject.shutdown
expect(subject.wait_for_termination(pool_termination_timeout)).to be_truthy
end
it 'returns true when shutdown successfully completes before timeout' do
subject.post{ sleep(0.5) }
sleep(0.1)
subject.shutdown
expect(subject.wait_for_termination(pool_termination_timeout)).to be_truthy
end
it 'returns false when shutdown fails to complete before timeout' do
unless subject.serialized?
latch = Concurrent::CountDownLatch.new 1
100.times{ subject.post{ latch.wait } }
sleep(0.1)
subject.shutdown
expect(subject.wait_for_termination(0.01)).to be_falsey
latch.count_down
end
end
it 'waits forever when no timeout value is given' do
subject.post{ sleep(0.5) }
sleep(0.1)
subject.shutdown
expect(subject.wait_for_termination).to be_truthy
end
end
end
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