1 files changed, 52 insertions, 0 deletions
diff --git a/spec/lib/gitlab/metrics/exporter/health_checks_middleware_spec.rb b/spec/lib/gitlab/metrics/exporter/health_checks_middleware_spec.rb
new file mode 100644
index 00000000000..9ee46a45e7a
--- /dev/null
+++ b/spec/lib/gitlab/metrics/exporter/health_checks_middleware_spec.rb
@@ -0,0 +1,52 @@
+# frozen_string_literal: true
+
+require 'fast_spec_helper'
+
+RSpec.describe Gitlab::Metrics::Exporter::HealthChecksMiddleware do
+  let(:app) { double(:app) }
+  let(:env) { { 'PATH_INFO' => path } }
+
+  let(:readiness_probe) { double(:readiness_probe) }
+  let(:liveness_probe) { double(:liveness_probe) }
+  let(:probe_result) { Gitlab::HealthChecks::Probes::Status.new(200, { status: 'ok' }) }
+
+  subject(:middleware) { described_class.new(app, readiness_probe, liveness_probe) }
+
+  describe '#call' do
+    context 'handling /readiness requests' do
+      let(:path) { '/readiness' }
+
+      it 'handles the request' do
+        expect(readiness_probe).to receive(:execute).and_return(probe_result)
+
+        response = middleware.call(env)
+
+        expect(response).to eq([200, { 'Content-Type' => 'application/json; charset=utf-8' }, ['{"status":"ok"}']])
+      end
+    end
+
+    context 'handling /liveness requests' do
+      let(:path) { '/liveness' }
+
+      it 'handles the request' do
+        expect(liveness_probe).to receive(:execute).and_return(probe_result)
+
+        response = middleware.call(env)
+
+        expect(response).to eq([200, { 'Content-Type' => 'application/json; charset=utf-8' }, ['{"status":"ok"}']])
+      end
+    end
+
+    context 'handling other requests' do
+      let(:path) { '/other_path' }
+
+      it 'forwards them to the next middleware' do
+        expect(app).to receive(:call).with(env).and_return([201, {}, []])
+
+        response = middleware.call(env)
+
+        expect(response).to eq([201, {}, []])
+      end
+    end
+  end
+end