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# frozen_string_literal: true
require 'spec_helper'
RSpec.describe Gitlab::Metrics::BackgroundTransaction do
let(:test_worker_class) { double(:class, name: 'TestWorker') }
let(:prometheus_metric) { instance_double(Prometheus::Client::Metric, base_labels: {}) }
before do
allow(described_class).to receive(:prometheus_metric).and_return(prometheus_metric)
end
subject { described_class.new(test_worker_class) }
RSpec.shared_examples 'metric with worker labels' do |metric_method|
it 'measures with correct labels and value' do
value = 1
expect(prometheus_metric).to receive(metric_method).with({ controller: 'TestWorker', action: 'perform', feature_category: '' }, value)
subject.send(metric_method, :bau, value)
end
end
describe '#label' do
it 'returns labels based on class name' do
expect(subject.labels).to eq(controller: 'TestWorker', action: 'perform', feature_category: '')
end
it 'contains only the labels defined for metrics' do
expect(subject.labels.keys).to contain_exactly(*described_class.superclass::BASE_LABEL_KEYS)
end
it 'includes the feature category if there is one' do
expect(test_worker_class).to receive(:get_feature_category).and_return('source_code_management')
expect(subject.labels).to include(feature_category: 'source_code_management')
end
end
describe '#increment' do
let(:prometheus_metric) { instance_double(Prometheus::Client::Counter, :increment, base_labels: {}) }
it_behaves_like 'metric with worker labels', :increment
end
describe '#set' do
let(:prometheus_metric) { instance_double(Prometheus::Client::Gauge, :set, base_labels: {}) }
it_behaves_like 'metric with worker labels', :set
end
describe '#observe' do
let(:prometheus_metric) { instance_double(Prometheus::Client::Histogram, :observe, base_labels: {}) }
it_behaves_like 'metric with worker labels', :observe
end
end
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