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require 'helper'
describe Delayed::Worker do
describe 'backend=' do
before do
@clazz = Class.new
Delayed::Worker.backend = @clazz
end
after do
Delayed::Worker.backend = :test
end
it 'sets the Delayed::Job constant to the backend' do
expect(Delayed::Job).to eq(@clazz)
end
it 'sets backend with a symbol' do
Delayed::Worker.backend = :test
expect(Delayed::Worker.backend).to eq(Delayed::Backend::Test::Job)
end
end
describe 'job_say' do
before do
@worker = Delayed::Worker.new
@job = double('job', :id => 123, :name => 'ExampleJob', :queue => nil)
end
it 'logs with job name and id' do
expect(@job).to receive(:queue)
expect(@worker).to receive(:say).
with('Job ExampleJob (id=123) message', Delayed::Worker.default_log_level)
@worker.job_say(@job, 'message')
end
it 'logs with job name, queue and id' do
expect(@job).to receive(:queue).and_return('test')
expect(@worker).to receive(:say).
with('Job ExampleJob (id=123) (queue=test) message', Delayed::Worker.default_log_level)
@worker.job_say(@job, 'message')
end
it 'has a configurable default log level' do
Delayed::Worker.default_log_level = 'error'
expect(@worker).to receive(:say).
with('Job ExampleJob (id=123) message', 'error')
@worker.job_say(@job, 'message')
end
end
context 'worker read-ahead' do
before do
@read_ahead = Delayed::Worker.read_ahead
end
after do
Delayed::Worker.read_ahead = @read_ahead
end
it 'reads five jobs' do
expect(Delayed::Job).to receive(:find_available).with(anything, 5, anything).and_return([])
Delayed::Job.reserve(Delayed::Worker.new)
end
it 'reads a configurable number of jobs' do
Delayed::Worker.read_ahead = 15
expect(Delayed::Job).to receive(:find_available).with(anything, Delayed::Worker.read_ahead, anything).and_return([])
Delayed::Job.reserve(Delayed::Worker.new)
end
end
context 'worker exit on complete' do
before do
Delayed::Worker.exit_on_complete = true
end
after do
Delayed::Worker.exit_on_complete = false
end
it 'exits the loop when no jobs are available' do
worker = Delayed::Worker.new
Timeout.timeout(2) do
worker.start
end
end
end
context 'worker job reservation' do
before do
Delayed::Worker.exit_on_complete = true
end
after do
Delayed::Worker.exit_on_complete = false
end
it 'handles error during job reservation' do
expect(Delayed::Job).to receive(:reserve).and_raise(Exception)
Delayed::Worker.new.work_off
end
it 'gives up after 10 backend failures' do
expect(Delayed::Job).to receive(:reserve).exactly(10).times.and_raise(Exception)
worker = Delayed::Worker.new
9.times { worker.work_off }
expect { worker.work_off }.to raise_exception Delayed::FatalBackendError
end
it 'allows the backend to attempt recovery from reservation errors' do
expect(Delayed::Job).to receive(:reserve).and_raise(Exception)
expect(Delayed::Job).to receive(:recover_from).with(instance_of(Exception))
Delayed::Worker.new.work_off
end
end
context '#say' do
before(:each) do
@worker = Delayed::Worker.new
@worker.name = 'ExampleJob'
@worker.logger = double('job')
time = Time.now
allow(Time).to receive(:now).and_return(time)
@text = 'Job executed'
@worker_name = '[Worker(ExampleJob)]'
@expected_time = time.strftime('%FT%T%z')
end
after(:each) do
@worker.logger = nil
end
shared_examples_for 'a worker which logs on the correct severity' do |severity|
it "logs a message on the #{severity[:level].upcase} level given a string" do
expect(@worker.logger).to receive(:send).
with(severity[:level], "#{@expected_time}: #{@worker_name} #{@text}")
@worker.say(@text, severity[:level])
end
it "logs a message on the #{severity[:level].upcase} level given a fixnum" do
expect(@worker.logger).to receive(:send).
with(severity[:level], "#{@expected_time}: #{@worker_name} #{@text}")
@worker.say(@text, severity[:index])
end
end
severities = [{:index => 0, :level => 'debug'},
{:index => 1, :level => 'info'},
{:index => 2, :level => 'warn'},
{:index => 3, :level => 'error'},
{:index => 4, :level => 'fatal'},
{:index => 5, :level => 'unknown'}]
severities.each do |severity|
it_behaves_like 'a worker which logs on the correct severity', severity
end
it 'logs a message on the default log\'s level' do
expect(@worker.logger).to receive(:send).
with('info', "#{@expected_time}: #{@worker_name} #{@text}")
@worker.say(@text, Delayed::Worker.default_log_level)
end
end
describe 'plugin registration' do
it 'does not double-register plugins on worker instantiation' do
performances = 0
plugin = Class.new(Delayed::Plugin) do
callbacks do |lifecycle|
lifecycle.before(:enqueue) { performances += 1 }
end
end
Delayed::Worker.plugins << plugin
Delayed::Worker.new
Delayed::Worker.new
Delayed::Worker.lifecycle.run_callbacks(:enqueue, nil) {}
expect(performances).to eq(1)
end
end
end
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