135 lines
4.3 KiB
Ruby
135 lines
4.3 KiB
Ruby
require 'rails_helper'
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describe DockerContainerPool do
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let(:container) { double }
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def reload_class
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load('docker_container_pool.rb')
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end
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private :reload_class
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before(:each) do
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@execution_environment = FactoryGirl.create(:ruby)
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reload_class
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end
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it 'uses thread-safe data structures' do
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expect(described_class.instance_variable_get(:@containers)).to be_a(ThreadSafe::Hash)
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expect(described_class.instance_variable_get(:@containers)[@execution_environment.id]).to be_a(ThreadSafe::Array)
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end
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describe '.clean_up' do
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before(:each) { described_class.instance_variable_set(:@refill_task, double) }
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after(:each) { described_class.clean_up }
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it 'stops the refill task' do
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expect(described_class.instance_variable_get(:@refill_task)).to receive(:shutdown)
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end
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it 'destroys all containers' do
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described_class.instance_variable_get(:@containers).values.flatten.each do |container|
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expect(DockerClient).to receive(:destroy_container).with(container)
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end
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end
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end
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describe '.get_container' do
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context 'when active' do
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before(:each) do
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expect(described_class).to receive(:config).and_return(active: true)
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end
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context 'with an available container' do
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before(:each) { described_class.instance_variable_get(:@containers)[@execution_environment.id].push(container) }
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it 'takes a container from the pool' do
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expect(described_class).not_to receive(:create_container).with(@execution_environment)
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expect(described_class.get_container(@execution_environment)).to eq(container)
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end
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end
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context 'without an available container' do
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before(:each) do
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expect(described_class.instance_variable_get(:@containers)[@execution_environment.id]).to be_empty
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end
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it 'creates a new container' do
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expect(described_class).to receive(:create_container).with(@execution_environment)
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described_class.get_container(@execution_environment)
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end
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end
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end
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context 'when inactive' do
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before(:each) do
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expect(described_class).to receive(:config).and_return(active: false)
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end
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it 'creates a new container' do
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expect(described_class).to receive(:create_container).with(@execution_environment)
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described_class.get_container(@execution_environment)
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end
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end
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end
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describe '.quantities' do
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it 'maps execution environments to quantities of available containers' do
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expect(described_class.quantities.keys).to eq(ExecutionEnvironment.all.map(&:id))
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expect(described_class.quantities.values.uniq).to eq([0])
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end
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end
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describe '.refill' do
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let(:config) { double }
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let(:maximum_refill_count) { 5 }
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before(:each) do
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expect(described_class).to receive(:config).and_return(config)
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expect(config).to receive(:[]).with(:maximum_refill_count).and_return(maximum_refill_count)
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end
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after(:each) { described_class.refill }
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it 'regards all execution environments' do
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ExecutionEnvironment.all.each do |execution_environment|
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expect(described_class.instance_variable_get(:@containers)).to receive(:[]).with(execution_environment.id).and_call_original
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end
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end
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context 'with something to refill' do
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before(:each) { @execution_environment.update(pool_size: 10) }
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it 'complies with the maximum batch size' do
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expect_any_instance_of(Concurrent::Future).to receive(:execute) do |future|
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expect(described_class).to receive(:create_container).with(@execution_environment).exactly(maximum_refill_count).times
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future.instance_variable_get(:@task).call
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end
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end
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it 'works asynchronously' do
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expect(Concurrent::Future).to receive(:execute)
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end
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end
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context 'with nothing to refill' do
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before(:each) { @execution_environment.update(pool_size: 0) }
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it 'does nothing' do
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expect(Concurrent::Future).not_to receive(:execute)
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end
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end
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end
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describe '.start_refill_task' do
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after(:each) { described_class.start_refill_task }
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it 'creates an asynchronous task' do
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expect(Concurrent::TimerTask).to receive(:new).and_call_original
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end
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it 'executes the task' do
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expect_any_instance_of(Concurrent::TimerTask).to receive(:execute)
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end
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end
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end
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