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# frozen_string_literal: true
# rubocop:todo all
require 'spec_helper'
describe Mongo::Server::ConnectionPool::Populator do
require_no_linting
let(:options) { {} }
let(:client) do
authorized_client.with(options)
end
let(:server) do
client.cluster.next_primary
end
let(:pool) do
server.pool
end
let(:populator) do
register_background_thread_object(
described_class.new(pool, pool.options)
)
end
before do
# We create our own populator to test; disable pool's background populator
# and clear the pool, so ours can run
pool.disconnect!
pool.stop_populator
end
describe '#log_warn' do
it 'works' do
expect do
populator.log_warn('test warning')
end.not_to raise_error
end
end
describe '#run!' do
context 'when the min_pool_size is zero' do
let(:options) { {min_pool_size: 0} }
it 'calls populate on pool once' do
expect(pool).to receive(:populate).once.and_call_original
populator.run!
sleep 1
expect(populator.running?).to be true
end
end
context 'when the min_pool_size is greater than zero' do
let(:options) { {min_pool_size: 2, max_pool_size: 3} }
it 'calls populate on the pool multiple times' do
expect(pool).to receive(:populate).at_least(:once).and_call_original
populator.run!
sleep 1
expect(populator.running?).to be true
end
it 'populates the pool up to min_size' do
pool.instance_variable_set(:@ready, true)
populator.run!
::Utils.wait_for_condition(3) do
pool.size >= 2
end
expect(pool.size).to eq 2
expect(populator.running?).to be true
end
end
context 'when populate raises a non socket related error' do
it 'does not terminate the thread' do
expect(pool).to receive(:populate).once.and_raise(Mongo::Auth::InvalidMechanism.new(""))
populator.run!
sleep 0.5
expect(populator.running?).to be true
end
end
context 'when populate raises a socket related error' do
it 'does not terminate the thread' do
expect(pool).to receive(:populate).once.and_raise(Mongo::Error::SocketError)
populator.run!
sleep 0.5
expect(populator.running?).to be true
end
end
context "when clearing the pool" do
it "the populator is run one extra time" do
expect(pool).to receive(:populate).twice
populator.run!
sleep 0.5
pool.disconnect!
sleep 0.5
expect(populator.running?).to be true
end
end
end
describe '#stop' do
it 'stops calling populate on pool and terminates the thread' do
populator.run!
# let populator do work and wait on semaphore
sleep 0.5
expect(pool).not_to receive(:populate)
populator.stop!
expect(populator.running?).to be false
end
end
end
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