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# frozen_string_literal: true
require 'spec_helper'
RSpec.describe Gitlab::Database::LoadBalancing::RackMiddleware, :redis do
let(:app) { double(:app) }
let(:middleware) { described_class.new(app) }
let(:warden_user) { double(:warden, user: double(:user, id: 42)) }
let(:single_sticking_object) { Set.new([[ActiveRecord::Base.sticking, :user, 42]]) }
let(:multiple_sticking_objects) do
Set.new([
[ActiveRecord::Base.sticking, :user, 42],
[ActiveRecord::Base.sticking, :runner, '123456789'],
[ActiveRecord::Base.sticking, :runner, '1234']
])
end
after do
Gitlab::Database::LoadBalancing::Session.clear_session
end
describe '#call' do
it 'handles a request' do
env = {}
expect(middleware).to receive(:clear).twice
expect(middleware).to receive(:unstick_or_continue_sticking).with(env)
expect(middleware).to receive(:stick_if_necessary).with(env)
expect(app).to receive(:call).with(env).and_return(10)
expect(ActiveSupport::Notifications)
.to receive(:instrument)
.with('web_transaction_completed.load_balancing')
.and_call_original
expect(middleware.call(env)).to eq(10)
end
end
describe '#unstick_or_continue_sticking' do
it 'does not stick if no namespace and identifier could be found' do
expect(ApplicationRecord.sticking)
.not_to receive(:unstick_or_continue_sticking)
middleware.unstick_or_continue_sticking({})
end
it 'sticks to the primary if a warden user is found' do
env = { 'warden' => warden_user }
Gitlab::Database::LoadBalancing.base_models.each do |model|
expect(model.sticking)
.to receive(:unstick_or_continue_sticking)
.with(:user, 42)
end
middleware.unstick_or_continue_sticking(env)
end
it 'sticks to the primary if a sticking namespace and identifier is found' do
env = { described_class::STICK_OBJECT => single_sticking_object }
expect(ApplicationRecord.sticking)
.to receive(:unstick_or_continue_sticking)
.with(:user, 42)
middleware.unstick_or_continue_sticking(env)
end
it 'sticks to the primary if multiple sticking namespaces and identifiers were found' do
env = { described_class::STICK_OBJECT => multiple_sticking_objects }
expect(ApplicationRecord.sticking)
.to receive(:unstick_or_continue_sticking)
.with(:user, 42)
.ordered
expect(ApplicationRecord.sticking)
.to receive(:unstick_or_continue_sticking)
.with(:runner, '123456789')
.ordered
expect(ApplicationRecord.sticking)
.to receive(:unstick_or_continue_sticking)
.with(:runner, '1234')
.ordered
middleware.unstick_or_continue_sticking(env)
end
end
describe '#stick_if_necessary' do
it 'does not stick to the primary if not necessary' do
expect(ApplicationRecord.sticking)
.not_to receive(:stick_if_necessary)
middleware.stick_if_necessary({})
end
it 'sticks to the primary if a warden user is found' do
env = { 'warden' => warden_user }
Gitlab::Database::LoadBalancing.base_models.each do |model|
expect(model.sticking)
.to receive(:stick_if_necessary)
.with(:user, 42)
end
middleware.stick_if_necessary(env)
end
it 'sticks to the primary if a a single sticking object is found' do
env = { described_class::STICK_OBJECT => single_sticking_object }
expect(ApplicationRecord.sticking)
.to receive(:stick_if_necessary)
.with(:user, 42)
middleware.stick_if_necessary(env)
end
it 'sticks to the primary if multiple sticking namespaces and identifiers were found' do
env = { described_class::STICK_OBJECT => multiple_sticking_objects }
expect(ApplicationRecord.sticking)
.to receive(:stick_if_necessary)
.with(:user, 42)
.ordered
expect(ApplicationRecord.sticking)
.to receive(:stick_if_necessary)
.with(:runner, '123456789')
.ordered
expect(ApplicationRecord.sticking)
.to receive(:stick_if_necessary)
.with(:runner, '1234')
.ordered
middleware.stick_if_necessary(env)
end
end
describe '#clear' do
it 'clears the currently used host and session' do
session = spy(:session)
stub_const('Gitlab::Database::LoadBalancing::Session', session)
expect(Gitlab::Database::LoadBalancing).to receive(:release_hosts)
middleware.clear
expect(session).to have_received(:clear_session)
end
end
describe '#sticking_namespaces' do
context 'using a Warden request' do
it 'returns the warden user if present' do
env = { 'warden' => warden_user }
ids = Gitlab::Database::LoadBalancing.base_models.map do |model|
[model.sticking, :user, 42]
end
expect(middleware.sticking_namespaces(env)).to eq(ids)
end
it 'returns an empty Array if no user was present' do
warden = double(:warden, user: nil)
env = { 'warden' => warden }
expect(middleware.sticking_namespaces(env)).to eq([])
end
end
context 'using a request with a manually set sticking object' do
it 'returns the sticking object' do
env = { described_class::STICK_OBJECT => multiple_sticking_objects }
expect(middleware.sticking_namespaces(env)).to eq([
[ActiveRecord::Base.sticking, :user, 42],
[ActiveRecord::Base.sticking, :runner, '123456789'],
[ActiveRecord::Base.sticking, :runner, '1234']
])
end
end
context 'using a regular request' do
it 'returns an empty Array' do
expect(middleware.sticking_namespaces({})).to eq([])
end
end
end
end
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