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require_relative 'executor_service_shared'
RSpec.shared_examples :thread_pool do
after(:each) do
subject.shutdown
expect(subject.wait_for_termination(pool_termination_timeout)).to eq true
end
it_should_behave_like :executor_service
let(:latch) { Concurrent::CountDownLatch.new }
context '#auto_terminate?' do
it 'returns true by default' do
expect(subject.auto_terminate?).to be true
end
it 'returns true when :enable_at_exit_handler is true' do
if described_class.to_s =~ /FixedThreadPool$/
subject = described_class.new(1, auto_terminate: true)
else
subject = described_class.new(auto_terminate: true)
end
expect(subject.auto_terminate?).to be true
subject.shutdown
expect(subject.wait_for_termination(pool_termination_timeout)).to eq true
end
it 'returns false when :enable_at_exit_handler is false' do
if described_class.to_s =~ /FixedThreadPool$/
subject = described_class.new(1, auto_terminate: false)
else
subject = described_class.new(auto_terminate: false)
end
expect(subject.auto_terminate?).to be false
subject.shutdown
expect(subject.wait_for_termination(pool_termination_timeout)).to eq true
end
end
context '#length' do
it 'returns zero on creation' do
expect(subject.length).to eq 0
end
it 'returns zero once shut down' do
5.times{ subject.post{ sleep(0.1) } }
subject.post { latch.count_down }
latch.wait(0.1)
subject.shutdown
expect(subject.wait_for_termination(pool_termination_timeout)).to eq true
expect(subject.length).to eq 0
end
end
context '#scheduled_task_count' do
it 'returns zero on creation' do
expect(subject.scheduled_task_count).to eq 0
end
it 'returns the approximate number of tasks that have been post thus far' do
10.times{ subject.post{ nil } }
subject.post { latch.count_down }
latch.wait(0.1)
expect(subject.scheduled_task_count).to be > 0
end
it 'returns the approximate number of tasks that were post' do
10.times{ subject.post{ nil } }
subject.post { latch.count_down }
latch.wait(0.1)
subject.shutdown
expect(subject.wait_for_termination(pool_termination_timeout)).to eq true
expect(subject.scheduled_task_count).to be > 0
end
end
context '#completed_task_count' do
it 'returns zero on creation' do
expect(subject.completed_task_count).to eq 0
end
unless Concurrent.on_jruby?
it 'returns the approximate number of tasks that have been completed thus far' do
5.times{ subject.post{ raise StandardError } }
5.times{ subject.post{ nil } }
subject.post { latch.count_down }
latch.wait(1)
expect(subject.completed_task_count).to be > 0
end
end
end
context '#shutdown' do
it 'allows threads to exit normally' do
10.times{ subject << proc{ nil } }
expect(subject.length).to be > 0
sleep(0.1)
subject.shutdown
sleep(1)
expect(subject.length).to eq(0)
end
end
end
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