discourse/spec/lib/concern/cached_counting_spec.rb

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# frozen_string_literal: true
class TestCachedCounting
def self.clear!
@data = nil
end
def self.data
@data ||= {}
end
def self.write_cache!(key, count, date)
data[key] = count
end
end
describe CachedCounting do
it "should be default disabled in test" do
expect(CachedCounting.enabled?).to eq(false)
end
context "backing implementation" do
it "can correctly check for flush to db lock" do
CachedCounting.clear_flush_to_db_lock!
expect(CachedCounting.allowed_to_flush_to_db?).to eq(true)
expect(CachedCounting.allowed_to_flush_to_db?).to eq(false)
t = CachedCounting::DB_FLUSH_COOLDOWN_SECONDS
# let expiry be between 2 seconds to allow for slow calls and so on
expect(CachedCounting.flush_to_db_lock_ttl).to be_between(t - 2, t)
CachedCounting.clear_flush_to_db_lock!
end
context "with a test counting class" do
before do
CachedCounting.reset
TestCachedCounting.clear!
end
it "can dispatch counts to backing class" do
CachedCounting.queue("a,a", TestCachedCounting)
CachedCounting.queue("a,a", TestCachedCounting)
CachedCounting.queue("b", TestCachedCounting)
CachedCounting.flush_in_memory
CachedCounting.flush_to_db
expect(TestCachedCounting.data).to eq({ "a,a" => 2, "b" => 1 })
end
end
end
context "active record" do
class RailsCacheCounter < ActiveRecord::Base
include CachedCounting
self.table_name = "posts"
def self.cache_data
@cache_data ||= {}
end
def self.clear_cache_data
@cache_data = nil
end
def self.write_cache!(key, val, date)
cache_data[[key, date]] = val
end
end
before do
CachedCounting.reset
CachedCounting.enable
end
after do
CachedCounting.disable
end
it "can dispatch data via background thread" do
freeze_time
d1 = Time.now.utc.to_date
RailsCacheCounter.perform_increment!("a,a")
RailsCacheCounter.perform_increment!("b")
20.times do
RailsCacheCounter.perform_increment!("a,a")
end
freeze_time 2.days.from_now
d2 = Time.now.utc.to_date
RailsCacheCounter.perform_increment!("a,a")
RailsCacheCounter.perform_increment!("d")
CachedCounting.flush
expected = {
["a,a", d1] => 21,
["b", d1] => 1,
["a,a", d2] => 1,
["d", d2] => 1,
}
expect(RailsCacheCounter.cache_data).to eq(expected)
end
end
end