discourse/spec/services/random_topic_selector_spec.rb

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require 'rails_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(0)).to eq([])
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expect(RandomTopicSelector.next(2)).to eq([0, 1])
$redis.expects(:multi).returns(Discourse.received_readonly!)
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expect(RandomTopicSelector.next(2)).to eq([2, 3])
$redis.unstub(:multi)
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expect(RandomTopicSelector.next(2)).to eq([2, 3])
expect(RandomTopicSelector.next(2)).to eq([])
end
it 'can correctly backfill' do
category = Fabricate(:category, sort_order: 'op_likes')
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)
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expect(RandomTopicSelector.next(5, category).sort).to eq([t1.id, t4.id].sort)
end
end