Add cookies JS example

examples/cookies.js

@@ -0,0 +1,50 @@
+import { check } from 'k6';
+import { browser } from 'k6/x/browser';
+
+export const options = {
+  scenarios: {
+    ui: {
+      executor: 'shared-iterations',
+      options: {
+        browser: {
+            type: 'chromium',
+        },
+      },
+    },
+  },
+  thresholds: {
+    checks: ["rate==1.0"]
+  }
+};
+
+export default async function () {
+  const page = browser.newPage();
+  const context = page.context();
+
+  try {
+    // get cookies from the browser context
+    check(context.cookies().length, {
+        'initial number of cookies should be zero': n => n === 0,
+    });
+
+    // add some cookies to the browser context
+    context.addCookies([{name: 'testcookie', value: '1', sameSite: 'Strict', domain: '127.0.0.1', path: '/'}]);
+    context.addCookies([{name: 'testcookie2', value: '2', sameSite: 'Lax', domain: '127.0.0.1', path: '/'}]);
+
+    check(context.cookies().length, {
+      'number of cookies should be 2': n => n === 2,
+    });
+
+    const cookies = context.cookies();
+    check(cookies[0], {
+      'cookie 1 name should be testcookie': c => c.name === 'testcookie',
+      'cookie 1 value should be 1': c => c.value === '1',
+    });
+    check(cookies[1], {
+      'cookie 2 name should be testcookie2': c => c.name === 'testcookie2',
+      'cookie 2 value should be 2': c => c.value === '2',
+    });
+  } finally {
+    page.close();
+  } 
+}