Add constant arrival rate test scenarios

scripts/iterationRate/constantArrivalRate.js

@@ -0,0 +1,60 @@
+import http from 'k6/http';
+import { group, sleep } from 'k6';
+
+const BASE_URL = `http://${__ENV.HOST || 'localhost'}:8080/tools.descartes.teastore.webui`;
+
+const groupResponseTimes = {};
+
+
+export const options = {
+    discardResponseBodies: true,
+    scenarios: {
+        scenario1: {
+            executor: 'constant-arrival-rate',
+            duration: '1m',
+            rate: 20,
+            timeUnit: '1s',
+            preAllocatedVUs: 50,
+        },
+        scenario2: {
+            executor: 'constant-arrival-rate',
+            duration: '120s',
+            rate: 50,
+            timeUnit: '1s',
+            preAllocatedVUs: 100,
+        },
+        scenario3: {
+            executor: 'constant-arrival-rate',
+            duration: '30s',
+            rate: 10,
+            timeUnit: '1s',
+            preAllocatedVUs: 30,
+        },
+        scenario4: {
+            executor: 'constant-arrival-rate',
+            duration: '30s',
+            rate: 40,
+            timeUnit: '1s',
+            preAllocatedVUs: 70,
+        },
+        scenario5: {
+            executor: 'constant-arrival-rate',
+            duration: '30s',
+            rate: 15,
+            timeUnit: '1s',
+            preAllocatedVUs: 40,
+        },
+    },
+};
+
+export default function () {
+    group('Black Tea Category Browse', () => {
+        const start = new Date();
+        http.get(`${BASE_URL}/category?category=2&page=1`);
+        const end = new Date();
+        const duration = end - start;
+        groupResponseTimes['Black Tea Category Browse'] = (groupResponseTimes['Black Tea Category Browse'] || 0) + duration;
+        // Sleep time is 1000ms. Total iteration time is sleep + time to finish request.
+        sleep(1);
+    });
+}