diff options
Diffstat (limited to 'spec/lib/gitlab/metrics/background_transaction_spec.rb')
-rw-r--r-- | spec/lib/gitlab/metrics/background_transaction_spec.rb | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/spec/lib/gitlab/metrics/background_transaction_spec.rb b/spec/lib/gitlab/metrics/background_transaction_spec.rb new file mode 100644 index 00000000000..b31a2f7549a --- /dev/null +++ b/spec/lib/gitlab/metrics/background_transaction_spec.rb @@ -0,0 +1,67 @@ +# frozen_string_literal: true + +require 'spec_helper' + +RSpec.describe Gitlab::Metrics::BackgroundTransaction do + let(:transaction) { described_class.new } + let(:prometheus_metric) { instance_double(Prometheus::Client::Metric, base_labels: {}) } + + before do + allow(described_class).to receive(:prometheus_metric).and_return(prometheus_metric) + end + + describe '#run' do + it 'yields the supplied block' do + expect { |b| transaction.run(&b) }.to yield_control + end + + it 'stores the transaction in the current thread' do + transaction.run do + expect(Thread.current[described_class::BACKGROUND_THREAD_KEY]).to eq(transaction) + end + end + + it 'removes the transaction from the current thread upon completion' do + transaction.run { } + + expect(Thread.current[described_class::BACKGROUND_THREAD_KEY]).to be_nil + end + end + + describe '#labels' do + it 'provides labels with endpoint_id and feature_category' do + Labkit::Context.with_context(feature_category: 'projects', caller_id: 'TestWorker') do + expect(transaction.labels).to eq({ endpoint_id: 'TestWorker', feature_category: 'projects' }) + end + end + end + + RSpec.shared_examples 'metric with labels' do |metric_method| + it 'measures with correct labels and value' do + value = 1 + expect(prometheus_metric).to receive(metric_method).with({ endpoint_id: 'TestWorker', feature_category: 'projects' }, value) + + Labkit::Context.with_context(feature_category: 'projects', caller_id: 'TestWorker') do + transaction.send(metric_method, :test_metric, value) + end + end + end + + describe '#increment' do + let(:prometheus_metric) { instance_double(Prometheus::Client::Counter, :increment, base_labels: {}) } + + it_behaves_like 'metric with labels', :increment + end + + describe '#set' do + let(:prometheus_metric) { instance_double(Prometheus::Client::Gauge, :set, base_labels: {}) } + + it_behaves_like 'metric with labels', :set + end + + describe '#observe' do + let(:prometheus_metric) { instance_double(Prometheus::Client::Histogram, :observe, base_labels: {}) } + + it_behaves_like 'metric with labels', :observe + end +end |