Files
codeocean/spec/lib/docker_container_pool_spec.rb
2016-06-07 13:52:01 +02:00

159 lines
5.2 KiB
Ruby

require 'rails_helper'
describe DockerContainerPool do
let(:container) { double(:start_time => Time.now, :status => 'available') }
def reload_class
load('docker_container_pool.rb')
end
private :reload_class
before(:each) do
@execution_environment = FactoryGirl.create(:ruby)
reload_class
end
it 'uses thread-safe data structures' do
expect(described_class.instance_variable_get(:@containers)).to be_a(ThreadSafe::Hash)
expect(described_class.instance_variable_get(:@containers)[@execution_environment.id]).to be_a(ThreadSafe::Array)
end
describe '.clean_up' do
before(:each) { described_class.instance_variable_set(:@refill_task, double) }
after(:each) { described_class.clean_up }
it 'stops the refill task' do
expect(described_class.instance_variable_get(:@refill_task)).to receive(:shutdown)
end
it 'destroys all containers' do
described_class.instance_variable_get(:@containers).values.flatten.each do |container|
expect(DockerClient).to receive(:destroy_container).with(container)
end
end
end
describe '.get_container' do
context 'when active' do
before(:each) do
expect(described_class).to receive(:config).and_return(active: true)
end
context 'with an available container' do
before(:each) { described_class.instance_variable_get(:@containers)[@execution_environment.id].push(container) }
it 'takes a container from the pool' do
expect(described_class).not_to receive(:create_container).with(@execution_environment)
# #<Double (anonymous)> received unexpected message :json with (no args)
# expect(described_class).to receive(:json).with()
expect(described_class.get_container(@execution_environment)).to eq(container)
end
end
context 'without an available container' do
before(:each) do
expect(described_class.instance_variable_get(:@containers)[@execution_environment.id]).to be_empty
end
it 'not creates a new container' do
expect(described_class).not_to receive(:create_container).with(@execution_environment)
described_class.get_container(@execution_environment)
end
end
end
context 'when inactive' do
before(:each) do
expect(described_class).to receive(:config).and_return(active: false)
end
it 'creates a new container' do
expect(described_class).to receive(:create_container).with(@execution_environment)
described_class.get_container(@execution_environment)
end
end
end
describe '.quantities' do
it 'maps execution environments to quantities of available containers' do
expect(described_class.quantities.keys).to eq(ExecutionEnvironment.all.map(&:id))
expect(described_class.quantities.values.uniq).to eq([0])
end
end
describe '.refill' do
before(:each) { @execution_environment.update(pool_size: 10) }
after(:each) { described_class.refill }
context 'when configured to work synchronously' do
before(:each) do
expect(described_class).to receive(:config).and_return(refill: {async: false})
end
it 'works synchronously' do
expect(described_class).to receive(:refill_for_execution_environment)
end
end
context 'when configured to work asynchronously' do
before(:each) do
expect(described_class).to receive(:config).and_return(refill: {async: true})
end
it 'works asynchronously' do
expect_any_instance_of(Concurrent::Future).to receive(:execute) do |future|
expect(described_class).to receive(:refill_for_execution_environment)
future.instance_variable_get(:@task).call
end
end
end
end
describe '.refill_for_execution_environment' do
let(:batch_size) { 5 }
before(:each) do
expect(described_class).to receive(:config).and_return(refill: {batch_size: batch_size})
end
after(:each) { described_class.refill_for_execution_environment(@execution_environment) }
context 'with something to refill' do
before(:each) { @execution_environment.update(pool_size: 10) }
it 'complies with the maximum batch size' do
expect(described_class).to receive(:create_container).with(@execution_environment).exactly(batch_size).times
end
end
context 'with nothing to refill' do
before(:each) { @execution_environment.update(pool_size: 0) }
it 'does nothing' do
expect(described_class).not_to receive(:create_container)
end
end
end
describe '.start_refill_task' do
let(:interval) { 30 }
let(:timeout) { 60 }
before(:each) do
expect(described_class).to receive(:config).at_least(:once).and_return(refill: {interval: interval, timeout: timeout})
end
after(:each) { described_class.start_refill_task }
# changed from false to true
it 'creates an asynchronous task' do
expect(Concurrent::TimerTask).to receive(:new).with(execution_interval: interval, run_now: true, timeout_interval: timeout).and_call_original
end
it 'executes the task' do
expect_any_instance_of(Concurrent::TimerTask).to receive(:execute)
end
end
end