gitlab-org--gitlab-foss/spec/lib/gitlab/redis_spec.rb

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require 'spec_helper'
describe Gitlab::Redis do
include StubENV
before(:each) { clear_raw_config }
after(:each) { clear_raw_config }
describe '.params' do
subject { described_class.params }
it 'withstands mutation' do
params1 = described_class.params
params2 = described_class.params
params1[:foo] = :bar
expect(params2).not_to have_key(:foo)
end
context 'when url contains unix socket reference' do
let(:config_old) { Rails.root.join('spec/fixtures/config/redis_old_format_socket.yml').to_s }
let(:config_new) { Rails.root.join('spec/fixtures/config/redis_new_format_socket.yml').to_s }
context 'with old format' do
it 'returns path key instead' do
stub_const("#{described_class}::CONFIG_FILE", config_old)
is_expected.to include(path: '/path/to/old/redis.sock')
is_expected.not_to have_key(:url)
end
end
context 'with new format' do
it 'returns path key instead' do
stub_const("#{described_class}::CONFIG_FILE", config_new)
is_expected.to include(path: '/path/to/redis.sock')
is_expected.not_to have_key(:url)
end
end
end
context 'when url is host based' do
let(:config_old) { Rails.root.join('spec/fixtures/config/redis_old_format_host.yml') }
let(:config_new) { Rails.root.join('spec/fixtures/config/redis_new_format_host.yml') }
context 'with old format' do
it 'returns hash with host, port, db, and password' do
stub_const("#{described_class}::CONFIG_FILE", config_old)
is_expected.to include(host: 'localhost', password: 'mypassword', port: 6379, db: 99)
is_expected.not_to have_key(:url)
end
end
context 'with new format' do
it 'returns hash with host, port, db, and password' do
stub_const("#{described_class}::CONFIG_FILE", config_new)
is_expected.to include(host: 'localhost', password: 'mynewpassword', port: 6379, db: 99)
is_expected.not_to have_key(:url)
end
end
end
end
describe '.url' do
it 'withstands mutation' do
url1 = described_class.url
url2 = described_class.url
url1 << 'foobar'
expect(url2).not_to end_with('foobar')
end
context 'when yml file with env variable' do
let(:redis_config) { Rails.root.join('spec/fixtures/config/redis_config_with_env.yml') }
before do
stub_env('TEST_GITLAB_REDIS_URL', 'redis://redishost:6379')
end
it 'reads redis url from env variable' do
stub_const("#{described_class}::CONFIG_FILE", redis_config)
expect(described_class.url).to eq 'redis://redishost:6379'
end
end
end
describe '._raw_config' do
subject { described_class._raw_config }
it 'should be frozen' do
expect(subject).to be_frozen
end
it 'returns false when the file does not exist' do
stub_const("#{described_class}::CONFIG_FILE", '/var/empty/doesnotexist')
expect(subject).to eq(false)
end
end
describe '.with' do
before { clear_pool }
after { clear_pool }
context 'when running not on sidekiq workers' do
before { allow(Sidekiq).to receive(:server?).and_return(false) }
it 'instantiates a connection pool with size 5' do
expect(ConnectionPool).to receive(:new).with(size: 5).and_call_original
described_class.with { |_redis| true }
end
end
context 'when running on sidekiq workers' do
before do
allow(Sidekiq).to receive(:server?).and_return(true)
allow(Sidekiq).to receive(:options).and_return({ concurrency: 18 })
end
it 'instantiates a connection pool with a size based on the concurrency of the worker' do
expect(ConnectionPool).to receive(:new).with(size: 18 + 5).and_call_original
described_class.with { |_redis| true }
end
end
end
describe '#sentinels' do
subject { described_class.new(Rails.env).sentinels }
context 'when sentinels are defined' do
let(:config) { Rails.root.join('spec/fixtures/config/redis_new_format_host.yml') }
it 'returns an array of hashes with host and port keys' do
stub_const("#{described_class}::CONFIG_FILE", config)
is_expected.to include(host: 'localhost', port: 26380)
is_expected.to include(host: 'slave2', port: 26381)
end
end
context 'when sentinels are not defined' do
let(:config) { Rails.root.join('spec/fixtures/config/redis_old_format_host.yml') }
it 'returns nil' do
stub_const("#{described_class}::CONFIG_FILE", config)
is_expected.to be_nil
end
end
end
describe '#sentinels?' do
subject { described_class.new(Rails.env).sentinels? }
context 'when sentinels are defined' do
let(:config) { Rails.root.join('spec/fixtures/config/redis_new_format_host.yml') }
it 'returns true' do
stub_const("#{described_class}::CONFIG_FILE", config)
is_expected.to be_truthy
end
end
context 'when sentinels are not defined' do
let(:config) { Rails.root.join('spec/fixtures/config/redis_old_format_host.yml') }
it 'returns false' do
stub_const("#{described_class}::CONFIG_FILE", config)
is_expected.to be_falsey
end
end
end
describe '#raw_config_hash' do
it 'returns default redis url when no config file is present' do
expect(subject).to receive(:fetch_config) { false }
expect(subject.send(:raw_config_hash)).to eq(url: Gitlab::Redis::DEFAULT_REDIS_URL)
end
it 'returns old-style single url config in a hash' do
expect(subject).to receive(:fetch_config) { 'redis://myredis:6379' }
expect(subject.send(:raw_config_hash)).to eq(url: 'redis://myredis:6379')
end
end
describe '#fetch_config' do
it 'returns false when no config file is present' do
allow(described_class).to receive(:_raw_config) { false }
expect(subject.send(:fetch_config)).to be_falsey
end
end
def clear_raw_config
described_class.remove_instance_variable(:@_raw_config)
rescue NameError
# raised if @_raw_config was not set; ignore
end
def clear_pool
described_class.remove_instance_variable(:@pool)
rescue NameError
# raised if @pool was not set; ignore
end
end