discourse/spec/components/scheduler/defer_spec.rb

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# encoding: utf-8
# frozen_string_literal: true
require 'rails_helper'
require_dependency 'scheduler/defer'
describe Scheduler::Defer do
class DeferInstance
include Scheduler::Deferrable
end
def wait_for(timeout, &blk)
till = Time.now + (timeout.to_f / 1000)
while Time.now < till && !blk.call
sleep 0.001
end
end
class TrackingLogger < ::Logger
attr_reader :messages
def initialize
super(nil)
@messages = []
end
def add(*args, &block)
@messages << args
end
end
def track_log_messages
old_logger = Rails.logger
logger = Rails.logger = TrackingLogger.new
yield logger.messages
logger.messages
ensure
Rails.logger = old_logger
end
before do
@defer = DeferInstance.new
@defer.async = true
end
after do
@defer.stop!
end
it "supports timeout reporting" do
@defer.timeout = 0.05
m = track_log_messages do |messages|
10.times do
@defer.later("fast job") {}
end
@defer.later "weird slow job" do
sleep
end
wait_for(200) do
messages.length == 1
end
end
expect(m.length).to eq(1)
expect(m[0][2]).to include("weird slow job")
end
it "can pause and resume" do
x = 1
@defer.pause
@defer.later do
x = 2
end
expect(@defer.length).to eq(1)
@defer.do_all_work
expect(x).to eq(2)
@defer.resume
@defer.later do
x = 3
end
wait_for(1000) do
x == 3
end
expect(x).to eq(3)
end
it "recovers from a crash / fork" do
s = nil
@defer.stop!
wait_for(10) do
@defer.stopped?
end
# hack allow thread to die
sleep 0.005
@defer.later do
s = "good"
end
wait_for(10) do
s == "good"
end
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expect(s).to eq("good")
end
it "can queue jobs properly" do
s = nil
@defer.later do
s = "good"
end
wait_for(10) do
s == "good"
end
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expect(s).to eq("good")
end
end