Clear cookies before analytics integration tests

Author: dlarocque

packages/analytics/testing/integration-tests/integration.ts

@@ -50,12 +50,23 @@ async function checkForEventCalls(retryCount = 0): Promise<PerformanceEntry[]> {
   if (callsWithEvent.length === 0) {
     return checkForEventCalls(retryCount + 1);
   } else {
+    console.log("Events: ", JSON.stringify(callsWithEvent));
     return callsWithEvent;
   }
 }
 
 describe('FirebaseAnalytics Integration Smoke Tests', () => {
   let app: FirebaseApp;
+
+  // Clear cookies to prevent persistence issues across tests when run in non-headless browsers.
+  // This is required since gtag/logEvent behaviour is dependent on the session state; if an event has already been logged
+  // in a session, the event will be sent in the request payload instead of the query string.
+  beforeEach(() => {
+    document.cookie.split(";").forEach((cookie) => {
+    document.cookie = cookie.replace(/^ +/, "").replace(/=.*/, "=;expires=" + new Date().toUTCString() + ";path=/")
+    });
+  })
+
   describe('Using getAnalytics()', () => {
     afterEach(() => deleteApp(app));
     it('logEvent() sends correct network request.', async () => {