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require 'spec_helper'
describe Mongo::Session::SessionPool, if: test_sessions? do
let(:cluster) do
authorized_client.cluster
end
describe '.create' do
let!(:pool) do
described_class.create(cluster)
end
it 'creates a session pool' do
expect(pool).to be_a(Mongo::Session::SessionPool)
end
it 'adds the pool as an instance variable on the cluster' do
expect(cluster.session_pool).to eq(pool)
end
end
describe '#initialize' do
let(:pool) do
described_class.new(cluster)
end
it 'sets the cluster' do
expect(pool.instance_variable_get(:@cluster)).to be(authorized_client.cluster)
end
end
describe '#inspect' do
let(:pool) do
described_class.new(cluster)
end
before do
s = pool.checkout
pool.checkin(s)
end
it 'includes the Ruby object_id in the formatted string' do
expect(pool.inspect).to include(pool.object_id.to_s)
end
it 'includes the pool size in the formatted string' do
expect(pool.inspect).to include('current_size=1')
end
end
describe 'checkout' do
let(:pool) do
described_class.new(cluster)
end
context 'when a session is checked out' do
let!(:session_a) do
pool.checkout
end
let!(:session_b) do
pool.checkout
end
before do
pool.checkin(session_a)
pool.checkin(session_b)
end
it 'is returned to the front of the queue' do
expect(pool.checkout).to be(session_b)
expect(pool.checkout).to be(session_a)
end
end
context 'when there are sessions about to expire in the queue' do
let(:old_session_a) do
pool.checkout
end
let(:old_session_b) do
pool.checkout
end
before do
pool.checkin(old_session_a)
pool.checkin(old_session_b)
allow(old_session_a).to receive(:last_use).and_return(Time.now - 1800)
allow(old_session_b).to receive(:last_use).and_return(Time.now - 1800)
end
context 'when a session is checked out' do
let(:checked_out_session) do
pool.checkout
end
it 'disposes of the old session and returns a new one' do
expect(checked_out_session).not_to be(old_session_a)
expect(checked_out_session).not_to be(old_session_b)
expect(pool.instance_variable_get(:@queue)).to be_empty
end
end
end
context 'when a sessions that is about to expire is checked in' do
let(:old_session_a) do
pool.checkout
end
let(:old_session_b) do
pool.checkout
end
before do
allow(old_session_a).to receive(:last_use).and_return(Time.now - 1800)
allow(old_session_b).to receive(:last_use).and_return(Time.now - 1800)
pool.checkin(old_session_a)
pool.checkin(old_session_b)
end
it 'disposes of the old sessions instead of adding them to the pool' do
expect(pool.checkout).not_to be(old_session_a)
expect(pool.checkout).not_to be(old_session_b)
expect(pool.instance_variable_get(:@queue)).to be_empty
end
end
end
describe '#end_sessions' do
let(:pool) do
described_class.create(client.cluster)
end
let!(:session_a) do
pool.checkout
end
let!(:session_b) do
pool.checkout
end
let(:client) do
subscribed_client
end
after do
client.close
end
context 'when the number of ids is not larger than 10,000' do
before do
client.database.command(ping: 1)
pool.checkin(session_a)
pool.checkin(session_b)
end
let!(:cluster_time) do
client.cluster.cluster_time
end
let(:end_sessions_command) do
pool.end_sessions
EventSubscriber.started_events.find { |c| c.command_name == :endSessions}
end
it 'sends the endSessions command with all the session ids' do
end_sessions_command
expect(end_sessions_command.command[:endSessions]).to include(BSON::Document.new(session_a.session_id))
expect(end_sessions_command.command[:endSessions]).to include(BSON::Document.new(session_b.session_id))
end
context 'when talking to a replica set or mongos' do
it 'sends the endSessions command with all the session ids and cluster time' do
end_sessions_command
expect(end_sessions_command.command[:endSessions]).to include(BSON::Document.new(session_a.session_id))
expect(end_sessions_command.command[:endSessions]).to include(BSON::Document.new(session_b.session_id))
expect(end_sessions_command.command[:$clusterTime]).to eq(client.cluster.cluster_time)
end
end
end
context 'when the number of ids is larger than 10_000' do
let(:ids) do
10_001.times.map do |i|
bytes = [SecureRandom.uuid.gsub(/\-/, '')].pack('H*')
BSON::Document.new(id: BSON::Binary.new(bytes, :uuid))
end
end
before do
queue = []
ids.each do |id|
queue << double('session', session_id: id)
end
pool.instance_variable_set(:@queue, queue)
expect(Mongo::Operation::Commands::Command).to receive(:new).at_least(:twice).and_call_original
end
let(:end_sessions_commands) do
EventSubscriber.started_events.select { |c| c.command_name == :endSessions}
end
it 'sends the command more than once' do
pool.end_sessions
expect(end_sessions_commands.size).to eq(2)
expect(end_sessions_commands[0].command[:endSessions]).to eq(ids[0...10_000])
expect(end_sessions_commands[1].command[:endSessions]).to eq([ids[10_000]])
end
end
end
end
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