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# frozen_string_literal: true
# rubocop:todo all
require 'spec_helper'
describe 'Connection pool stress test' do
require_stress
let(:options) do
{ max_pool_size: 5, min_pool_size: 3 }
end
let(:thread_count) { 5 }
let(:documents) do
[].tap do |documents|
10000.times do |i|
documents << { a: i}
end
end
end
let(:operation_threads) do
[].tap do |threads|
thread_count.times do |i|
threads << Thread.new do
100.times do |j|
collection.find(a: i+j).to_a
sleep 0.1
collection.find(a: i+j).to_a
end
end
end
end
end
let(:client) do
authorized_client.with(options)
end
let(:collection) do
client[authorized_collection.name].tap do |collection|
collection.drop
collection.insert_many(documents)
end
end
shared_examples_for 'does not raise error' do
it 'does not raise error' do
collection
expect {
threads.collect { |t| t.join }
}.not_to raise_error
end
end
describe 'when several threads run operations on the collection' do
let(:threads) { operation_threads }
context 'min pool size 0, max pool size 5' do
let(:options) do
{ max_pool_size: 5, min_pool_size: 0 }
end
let(:thread_count) { 7 }
it_behaves_like 'does not raise error'
end
context 'min pool size 1, max pool size 5' do
let(:options) do
{ max_pool_size: 5, min_pool_size: 1 }
end
let(:thread_count) { 7 }
it_behaves_like 'does not raise error'
end
context 'min pool size 2, max pool size 5' do
let(:options) do
{ max_pool_size: 5, min_pool_size: 2 }
end
let(:thread_count) { 7 }
it_behaves_like 'does not raise error'
end
context 'min pool size 3, max pool size 5' do
let(:options) do
{ max_pool_size: 5, min_pool_size: 3 }
end
let(:thread_count) { 7 }
it_behaves_like 'does not raise error'
end
context 'min pool size 4, max pool size 5' do
let(:options) do
{ max_pool_size: 5, min_pool_size: 4 }
end
let(:thread_count) { 7 }
it_behaves_like 'does not raise error'
end
context 'min pool size 5, max pool size 5' do
let(:options) do
{ max_pool_size: 5, min_pool_size: 5 }
end
let(:thread_count) { 7 }
it_behaves_like 'does not raise error'
end
end
describe 'when there are many more threads than the max pool size' do
let(:threads) { operation_threads }
context '10 threads, max pool size 5' do
let(:thread_count) { 10 }
it_behaves_like 'does not raise error'
end
context '15 threads, max pool size 5' do
let(:thread_count) { 15 }
it_behaves_like 'does not raise error'
end
context '20 threads, max pool size 5' do
let(:thread_count) { 20 }
it_behaves_like 'does not raise error'
end
context '25 threads, max pool size 5' do
let(:thread_count) { 25 }
it_behaves_like 'does not raise error'
end
end
end
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