Add test for _setDefaultEventParametersForInit()

Author: dwyfrequency

packages/analytics/src/functions.test.ts

@@ -26,6 +26,7 @@ import {
   setAnalyticsCollectionEnabled
 } from './functions';
 import { GtagCommand } from './constants';
+import {defaultEventParametersForInit, _setDefaultEventParametersForInit} from './factory';
 
 const fakeMeasurementId = 'abcd-efgh-ijkl';
 const fakeInitializationPromise = Promise.resolve(fakeMeasurementId);
@@ -170,4 +171,19 @@ describe('FirebaseAnalytics methods', () => {
     expect(window[`ga-disable-${fakeMeasurementId}`]).to.be.true;
     delete window[`ga-disable-${fakeMeasurementId}`];
   });
+  it('_setDefaultEventParametersForInit() stores individual params correctly', async () => {
+    const eventParametersForInit = {'github_user': 'dwyfrequency', 'company': 'google'};
+    _setDefaultEventParametersForInit(eventParametersForInit);
+    expect(defaultEventParametersForInit).to.deep.equal(eventParametersForInit);
+  });
+  it('_setDefaultEventParametersForInit() adds new params correctly', async () => {
+    const eventParametersForInit = {'github_user': 'dwyfrequency', 'company': 'google'};
+    const additionalParams = {'food': 'sushi'};
+    _setDefaultEventParametersForInit(eventParametersForInit);
+    _setDefaultEventParametersForInit(additionalParams);
+    expect(defaultEventParametersForInit).to.deep.equal({
+      ...eventParametersForInit,
+      ...additionalParams
+    });
+  });
 });