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# frozen_string_literal: true
require 'spec_helper'
RSpec.describe Strategy::RoundRobin, :clean_gitlab_redis_shared_state do
subject(:round_robin) { described_class.new('_key_', %i[variant1 variant2]) }
describe "execute" do
context "when there are 2 variants" do
it "proves out round robin in selection", :aggregate_failures do
expect(round_robin.execute).to eq :variant2
expect(round_robin.execute).to eq :variant1
expect(round_robin.execute).to eq :variant2
end
end
context "when there are more than 2 variants" do
subject(:round_robin) { described_class.new('_key_', %i[variant1 variant2 variant3]) }
it "proves out round robin in selection", :aggregate_failures do
expect(round_robin.execute).to eq :variant2
expect(round_robin.execute).to eq :variant3
expect(round_robin.execute).to eq :variant1
expect(round_robin.execute).to eq :variant2
expect(round_robin.execute).to eq :variant3
expect(round_robin.execute).to eq :variant1
end
end
context "when writing to cache fails" do
subject(:round_robin) { described_class.new('_key_', []) }
it "raises an error and logs" do
allow(Gitlab::Redis::SharedState).to receive(:with).and_raise(Strategy::RoundRobin::CacheError)
expect(Gitlab::AppLogger).to receive(:warn)
expect { round_robin.execute }.to raise_error(Strategy::RoundRobin::CacheError)
end
end
end
describe "#counter_expires_in" do
it 'displays the expiration time in seconds' do
round_robin.execute
expect(round_robin.counter_expires_in).to be_between(0, described_class::COUNTER_EXPIRE_TIME)
end
end
describe '#value' do
it 'get the count' do
expect(round_robin.counter_value).to eq(0)
round_robin.execute
expect(round_robin.counter_value).to eq(1)
end
end
describe '#reset!' do
it 'resets the count down to zero' do
3.times { round_robin.execute }
expect { round_robin.reset! }.to change { round_robin.counter_value }.from(3).to(0)
end
end
end
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