diff options
Diffstat (limited to 'spec/lib/gitlab/metrics/exporter/metrics_middleware_spec.rb')
-rw-r--r-- | spec/lib/gitlab/metrics/exporter/metrics_middleware_spec.rb | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/spec/lib/gitlab/metrics/exporter/metrics_middleware_spec.rb b/spec/lib/gitlab/metrics/exporter/metrics_middleware_spec.rb new file mode 100644 index 00000000000..ac5721f5974 --- /dev/null +++ b/spec/lib/gitlab/metrics/exporter/metrics_middleware_spec.rb @@ -0,0 +1,39 @@ +# frozen_string_literal: true + +require 'spec_helper' + +RSpec.describe Gitlab::Metrics::Exporter::MetricsMiddleware do + let(:app) { double(:app) } + let(:pid) { 'fake_exporter' } + let(:env) { { 'PATH_INFO' => '/path', 'REQUEST_METHOD' => 'GET' } } + + subject(:middleware) { described_class.new(app, pid) } + + def metric(name, method, path, status) + metric = ::Prometheus::Client.registry.get(name) + return unless metric + + values = metric.values.transform_keys { |k| k.slice(:method, :path, :pid, :code) } + values[{ method: method, path: path, pid: pid, code: status.to_s }]&.get + end + + before do + expect(app).to receive(:call).with(env).and_return([200, {}, []]) + end + + describe '#call', :prometheus do + it 'records a total requests metric' do + response = middleware.call(env) + + expect(response).to eq([200, {}, []]) + expect(metric(:exporter_http_requests_total, 'get', '/path', 200)).to eq(1.0) + end + + it 'records a request duration histogram' do + response = middleware.call(env) + + expect(response).to eq([200, {}, []]) + expect(metric(:exporter_http_request_duration_seconds, 'get', '/path', 200)).to be_a(Hash) + end + end +end |