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require_relative 'concern/dereferenceable_shared'
require_relative 'concern/observable_shared'
module Concurrent
RSpec.describe TimerTask do
context :dereferenceable do
def kill_subject
@subject.kill if defined?(@subject) && @subject
rescue Exception
# prevent exceptions with mocks in tests
end
after(:each) do
kill_subject
end
def dereferenceable_subject(value, opts = {})
kill_subject
opts = opts.merge(execution_interval: 0.1, run_now: true)
@subject = TimerTask.new(opts) { value }.execute.tap { sleep(0.1) }
end
def dereferenceable_observable(opts = {})
opts = opts.merge(execution_interval: 0.1, run_now: true)
@subject = TimerTask.new(opts) { 'value' }
end
def execute_dereferenceable(subject)
subject.execute
sleep(0.1)
end
it_should_behave_like :dereferenceable
end
context :observable do
subject { TimerTask.new(execution_interval: 0.1) { nil } }
after(:each) { subject.kill }
def trigger_observable(observable)
observable.execute
sleep(0.2)
end
it_should_behave_like :observable
end
context 'created with #new' do
context '#initialize' do
it 'raises an exception if no block given' do
expect {
Concurrent::TimerTask.new
}.to raise_error(ArgumentError)
end
it 'raises an exception if :execution_interval is not greater than zero' do
expect {
Concurrent::TimerTask.new(execution_interval: 0) { nil }
}.to raise_error(ArgumentError)
end
it 'raises an exception if :execution_interval is not an integer' do
expect {
Concurrent::TimerTask.new(execution_interval: 'one') { nil }
}.to raise_error(ArgumentError)
end
it 'raises an exception if :timeout_interval is not greater than zero' do
expect {
Concurrent::TimerTask.new(timeout_interval: 0) { nil }
}.to raise_error(ArgumentError)
end
it 'raises an exception if :timeout_interval is not an integer' do
expect {
Concurrent::TimerTask.new(timeout_interval: 'one') { nil }
}.to raise_error(ArgumentError)
end
it 'uses the default execution interval when no interval is given' do
subject = TimerTask.new { nil }
expect(subject.execution_interval).to eq TimerTask::EXECUTION_INTERVAL
end
it 'uses the default timeout interval when no interval is given' do
subject = TimerTask.new { nil }
expect(subject.timeout_interval).to eq TimerTask::TIMEOUT_INTERVAL
end
it 'uses the given execution interval' do
subject = TimerTask.new(execution_interval: 5) { nil }
expect(subject.execution_interval).to eq 5
end
it 'uses the given timeout interval' do
subject = TimerTask.new(timeout_interval: 5) { nil }
expect(subject.timeout_interval).to eq 5
end
end
context '#kill' do
it 'returns true on success' do
task = TimerTask.execute(run_now: false) { nil }
sleep(0.1)
expect(task.kill).to be_truthy
end
end
context '#shutdown' do
it 'returns true on success' do
task = TimerTask.execute(run_now: false) { nil }
sleep(0.1)
expect(task.shutdown).to be_truthy
end
end
end
context 'arguments' do
it 'raises an exception if no block given' do
expect {
Concurrent::TimerTask.execute
}.to raise_error(ArgumentError)
end
specify '#execution_interval is writeable' do
latch = CountDownLatch.new(1)
subject = TimerTask.new(timeout_interval: 1,
execution_interval: 1,
run_now: true) do |task|
task.execution_interval = 3
latch.count_down
end
expect(subject.execution_interval).to eq(1)
subject.execution_interval = 0.1
expect(subject.execution_interval).to eq(0.1)
subject.execute
latch.wait(0.2)
expect(subject.execution_interval).to eq(3)
subject.kill
end
specify '#timeout_interval is writeable' do
latch = CountDownLatch.new(1)
subject = TimerTask.new(timeout_interval: 1,
execution_interval: 0.1,
run_now: true) do |task|
task.timeout_interval = 3
latch.count_down
end
expect(subject.timeout_interval).to eq(1)
subject.timeout_interval = 2
expect(subject.timeout_interval).to eq(2)
subject.execute
latch.wait(0.2)
expect(subject.timeout_interval).to eq(3)
subject.kill
end
end
context 'execution' do
it 'runs the block immediately when the :run_now option is true' do
latch = CountDownLatch.new(1)
subject = TimerTask.execute(execution: 500, now: true) { latch.count_down }
expect(latch.wait(1)).to be_truthy
subject.kill
end
it 'waits for :execution_interval seconds when the :run_now option is false' do
latch = CountDownLatch.new(1)
subject = TimerTask.execute(execution: 0.1, now: false) { latch.count_down }
expect(latch.count).to eq 1
expect(latch.wait(1)).to be_truthy
subject.kill
end
it 'waits for :execution_interval seconds when the :run_now option is not given' do
latch = CountDownLatch.new(1)
subject = TimerTask.execute(execution: 0.1, now: false) { latch.count_down }
expect(latch.count).to eq 1
expect(latch.wait(1)).to be_truthy
subject.kill
end
it 'passes a "self" reference to the block as the sole argument' do
expected = nil
latch = CountDownLatch.new(1)
subject = TimerTask.new(execution_interval: 1, run_now: true) do |task|
expected = task
latch.count_down
end
subject.execute
latch.wait(1)
expect(expected).to eq subject
expect(latch.count).to eq(0)
subject.kill
end
end
context 'observation' do
let(:observer) do
Class.new do
attr_reader :time
attr_reader :value
attr_reader :ex
attr_reader :latch
define_method(:initialize) { @latch = CountDownLatch.new(1) }
define_method(:update) do |time, value, ex|
@time = time
@value = value
@ex = ex
@latch.count_down
end
end.new
end
it 'notifies all observers on success' do
subject = TimerTask.new(execution: 0.1) { 42 }
subject.add_observer(observer)
subject.execute
observer.latch.wait(1)
expect(observer.value).to eq(42)
expect(observer.ex).to be_nil
subject.kill
end
it 'notifies all observers on timeout' do
subject = TimerTask.new(run_now: true, execution: 2, timeout: 0.1) { sleep }
subject.add_observer(observer)
subject.execute
observer.latch.wait(1)
expect(observer.value).to be_nil
expect(observer.ex).to be_a(Concurrent::TimeoutError)
subject.kill
end
it 'notifies all observers on error' do
subject = TimerTask.new(execution: 0.1) { raise ArgumentError }
subject.add_observer(observer)
subject.execute
observer.latch.wait(1)
expect(observer.value).to be_nil
expect(observer.ex).to be_a(ArgumentError)
subject.kill
end
end
end
end
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