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# frozen_string_literal: true
require 'spec_helper'
RSpec.describe Gitlab::RackAttack::Store, :clean_gitlab_redis_rate_limiting, feature_category: :scalability do
let(:store) { described_class.new }
let(:key) { 'foobar' }
let(:namespaced_key) { "cache:gitlab:#{key}" }
def with_redis(&block)
Gitlab::Redis::RateLimiting.with(&block)
end
describe '#increment' do
it 'increments without expiry' do
5.times do |i|
expect(store.increment(key, 1)).to eq(i + 1)
with_redis do |redis|
expect(redis.get(namespaced_key).to_i).to eq(i + 1)
expect(redis.ttl(namespaced_key)).to eq(-1)
end
end
end
it 'rejects amounts other than 1' do
expect { store.increment(key, 2) }.to raise_exception(described_class::InvalidAmount)
end
context 'with expiry' do
it 'increments and sets expiry' do
5.times do |i|
expect(store.increment(key, 1, expires_in: 456)).to eq(i + 1)
with_redis do |redis|
expect(redis.get(namespaced_key).to_i).to eq(i + 1)
expect(redis.ttl(namespaced_key)).to be_within(10).of(456)
end
end
end
end
end
describe '#read' do
subject { store.read(key) }
it 'reads the namespaced key' do
with_redis { |r| r.set(namespaced_key, '123') }
expect(subject).to eq('123')
end
end
describe '#write' do
subject { store.write(key, '123', options) }
let(:options) { {} }
it 'sets the key' do
subject
with_redis do |redis|
expect(redis.get(namespaced_key)).to eq('123')
expect(redis.ttl(namespaced_key)).to eq(-1)
end
end
context 'with expiry' do
let(:options) { { expires_in: 456 } }
it 'sets the key with expiry' do
subject
with_redis do |redis|
expect(redis.get(namespaced_key)).to eq('123')
expect(redis.ttl(namespaced_key)).to be_within(10).of(456)
end
end
end
end
describe '#delete' do
subject { store.delete(key) }
it { expect(subject).to eq(0) }
context 'when the key exists' do
before do
with_redis { |r| r.set(namespaced_key, '123') }
end
it { expect(subject).to eq(1) }
end
end
describe '#with' do
subject { store.send(:with, &:ping) }
it { expect(subject).to eq('PONG') }
context 'when redis is unavailable' do
before do
broken_redis = Redis.new(
url: 'redis://127.0.0.0:0',
instrumentation_class: Gitlab::Redis::RateLimiting.instrumentation_class
)
allow(Gitlab::Redis::RateLimiting).to receive(:with).and_yield(broken_redis)
end
it { expect(subject).to eq(nil) }
end
end
end
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