discourse/spec/components/distributed_memoizer_spec.rb

56 lines
1.0 KiB
Ruby

require 'spec_helper'
require_dependency 'distributed_memoizer'
describe DistributedMemoizer do
before do
$redis.del(DistributedMemoizer.redis_key("hello"))
$redis.del(DistributedMemoizer.redis_lock_key("hello"))
$redis.unwatch
end
# NOTE we could use a mock redis here, but I think it makes sense to test the real thing
# let(:mock_redis) { MockRedis.new }
def memoize(&block)
DistributedMemoizer.memoize("hello", duration = 120, &block)
end
it "returns the value of a block" do
memoize do
"abc"
end.should == "abc"
end
it "return the old value once memoized" do
memoize do
"abc"
end
memoize do
"world"
end.should == "abc"
end
it "memoizes correctly when used concurrently" do
results = []
threads = []
5.times do
threads << Thread.new do
results << memoize do
sleep 0.001
SecureRandom.hex
end
end
end
threads.each(&:join)
results.uniq.length.should == 1
results.count.should == 5
end
end