debian-mirror-gitlab/spec/lib/gitlab/metrics/elasticsearch_rack_middleware_spec.rb

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# frozen_string_literal: true
require 'spec_helper'
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RSpec.describe Gitlab::Metrics::ElasticsearchRackMiddleware do
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let(:app) { double(:app, call: 'app call result') }
let(:middleware) { described_class.new(app) }
let(:env) { {} }
let(:transaction) { Gitlab::Metrics::WebTransaction.new(env) }
describe '#call' do
let(:elasticsearch_query_time) { 0.1 }
let(:elasticsearch_requests_count) { 2 }
before do
allow(Gitlab::Instrumentation::ElasticsearchTransport).to receive(:query_time) { elasticsearch_query_time }
allow(Gitlab::Instrumentation::ElasticsearchTransport).to receive(:get_request_count) { elasticsearch_requests_count }
allow(Gitlab::Metrics).to receive(:current_transaction).and_return(transaction)
end
it 'calls the app' do
expect(middleware.call(env)).to eq('app call result')
end
it 'records elasticsearch metrics' do
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expect(transaction).to receive(:increment).with(:http_elasticsearch_requests_total, elasticsearch_requests_count)
expect(transaction).to receive(:observe).with(:http_elasticsearch_requests_duration_seconds, elasticsearch_query_time)
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middleware.call(env)
end
it 'records elasticsearch metrics if an error is raised' do
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expect(transaction).to receive(:increment).with(:http_elasticsearch_requests_total, elasticsearch_requests_count)
expect(transaction).to receive(:observe).with(:http_elasticsearch_requests_duration_seconds, elasticsearch_query_time)
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allow(app).to receive(:call).with(env).and_raise(StandardError)
expect { middleware.call(env) }.to raise_error(StandardError)
end
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context 'when there are no elasticsearch requests' do
let(:elasticsearch_requests_count) { 0 }
it 'does not record any metrics' do
expect(transaction).not_to receive(:observe).with(:http_elasticsearch_requests_duration_seconds)
expect(transaction).not_to receive(:increment).with(:http_elasticsearch_requests_total, 0)
middleware.call(env)
end
end
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end
end