[Test] Integration test for Kibana status API (#17509)

* [Test] Integration test for Kibana status API

* bad prettying

test/api_integration/apis/index.js

@@ -8,5 +8,6 @@ export default function ({ loadTestFile }) {
     loadTestFile(require.resolve('./search'));
     loadTestFile(require.resolve('./shorten'));
     loadTestFile(require.resolve('./suggestions'));
+    loadTestFile(require.resolve('./status'));
   });
 }

test/api_integration/apis/status/index.js

@@ -0,0 +1,6 @@
+export default function ({ loadTestFile }) {
+  describe('status', () => {
+    loadTestFile(require.resolve('./status'));
+  });
+}
+

test/api_integration/apis/status/status.js

@@ -0,0 +1,47 @@
+import expect from 'expect.js';
+
+export default function ({ getService }) {
+  const supertest = getService('supertest');
+
+  describe('kibana status api', () => {
+    it('returns version, status and metrics fields', () => {
+      return supertest
+        .get('/api/status')
+        .expect('Content-Type', /json/)
+        .expect(200)
+        .then(({ body }) => {
+          expect(body.name).to.be.a('string');
+          expect(body.uuid).to.be.a('string');
+          expect(body.version.number).to.be.a('string');
+          expect(body.version.build_hash).to.be.a('string');
+          expect(body.version.build_number).to.be.a('number');
+
+          expect(body.status.overall).to.be.an('object');
+          expect(body.status.overall.state).to.be('green');
+
+          expect(body.status.statuses).to.be.an('array');
+          const kibanaPlugin = body.status.statuses.find(s => {
+            return s.id.indexOf('plugin:kibana') === 0;
+          });
+          expect(kibanaPlugin.state).to.be('green');
+
+          expect(body.metrics.collection_interval_in_millis).to.be.a('number');
+
+          expect(body.metrics.process.mem.heap_max_in_bytes).to.be.a('number');
+          expect(body.metrics.process.mem.heap_used_in_bytes).to.be.a('number');
+
+          expect(body.metrics.os.cpu.load_average['1m']).to.be.a('number');
+          expect(body.metrics.os.cpu.load_average['5m']).to.be.a('number');
+          expect(body.metrics.os.cpu.load_average['15m']).to.be.a('number');
+
+          expect(body.metrics.response_times.avg_in_millis).not.to.be(undefined); // a number, but is null if no measurements have yet been collected for averaging
+          expect(body.metrics.response_times.max_in_millis).to.be.a('number');
+
+          expect(body.metrics.requests.total).to.be.a('number');
+          expect(body.metrics.requests.disconnects).to.be.a('number');
+          expect(body.metrics.requests.status_codes).to.be.an('object');
+          expect(body.metrics.concurrent_connections).to.be.a('number');
+        });
+    });
+  });
+}