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# frozen_string_literal: true
require 'spec_helper'
RSpec.describe Gitlab::Metrics::Samplers::ActionCableSampler do
let(:action_cable) { instance_double(ActionCable::Server::Base) }
subject { described_class.new(action_cable: action_cable) }
it_behaves_like 'metrics sampler', 'ACTION_CABLE_SAMPLER'
describe '#sample' do
let(:pool) { instance_double(Concurrent::ThreadPoolExecutor) }
before do
allow(action_cable).to receive_message_chain(:worker_pool, :executor).and_return(pool)
allow(action_cable).to receive(:connections).and_return([])
allow(pool).to receive(:min_length).and_return(1)
allow(pool).to receive(:max_length).and_return(2)
allow(pool).to receive(:length).and_return(3)
allow(pool).to receive(:largest_length).and_return(4)
allow(pool).to receive(:completed_task_count).and_return(5)
allow(pool).to receive(:queue_length).and_return(6)
end
shared_examples 'collects metrics' do |expected_labels|
it 'includes active connections' do
expect(subject.metrics[:active_connections]).to receive(:set).with(expected_labels, 0)
subject.sample
end
it 'includes minimum worker pool size' do
expect(subject.metrics[:pool_min_size]).to receive(:set).with(expected_labels, 1)
subject.sample
end
it 'includes maximum worker pool size' do
expect(subject.metrics[:pool_max_size]).to receive(:set).with(expected_labels, 2)
subject.sample
end
it 'includes current worker pool size' do
expect(subject.metrics[:pool_current_size]).to receive(:set).with(expected_labels, 3)
subject.sample
end
it 'includes largest worker pool size' do
expect(subject.metrics[:pool_largest_size]).to receive(:set).with(expected_labels, 4)
subject.sample
end
it 'includes worker pool completed task count' do
expect(subject.metrics[:pool_completed_tasks]).to receive(:set).with(expected_labels, 5)
subject.sample
end
it 'includes worker pool pending task count' do
expect(subject.metrics[:pool_pending_tasks]).to receive(:set).with(expected_labels, 6)
subject.sample
end
end
context 'for in-app mode' do
before do
expect(Gitlab::ActionCable::Config).to receive(:in_app?).and_return(true)
end
it_behaves_like 'collects metrics', server_mode: 'in-app'
end
context 'for standalone mode' do
before do
expect(Gitlab::ActionCable::Config).to receive(:in_app?).and_return(false)
end
it_behaves_like 'collects metrics', server_mode: 'standalone'
end
end
end
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