discourse/spec/services/random_topic_selector_spec.rb

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require 'spec_helper'
describe RandomTopicSelector do
it 'can correctly use cache' do
key = RandomTopicSelector.cache_key
$redis.del key
4.times do |t|
$redis.rpush key, t
end
expect(RandomTopicSelector.next(2)).to eq([0,1])
expect(RandomTopicSelector.next(2)).to eq([2,3])
end
it 'can correctly backfill' do
category = Fabricate(:category)
t1 = Fabricate(:topic, category_id: category.id)
_t2 = Fabricate(:topic, category_id: category.id, visible: false)
_t3 = Fabricate(:topic, category_id: category.id, deleted_at: 1.minute.ago)
t4 = Fabricate(:topic, category_id: category.id)
expect(RandomTopicSelector.next(5, category).sort).to eq([t1.id,t4.id].sort)
end
end