test(moment): migrate event utils

KK-1017.

For some reason, the moment in event utils works
differently in Vite than what it worked in CRA.
However, the same method seems to work
when manually tested on a running env.

src/common/test/testi18nInit.ts

@@ -2,6 +2,7 @@ import i18n from 'i18next';
 import { initReactI18next } from 'react-i18next';
 
 import fi from '../translation/i18n/fi.json';
+import setLocale, { Locale } from '../localization/setLocale';
 
 // eslint-disable-next-line import/no-named-as-default-member
 i18n.use(initReactI18next).init({
@@ -17,4 +18,6 @@ i18n.use(initReactI18next).init({
   },
 });
 
+setLocale(i18n.language as Locale);
+
 export default i18n;

src/domain/event/__tests__/EventUtils.test.ts

@@ -1,6 +1,7 @@
 import { formatOccurrenceTime } from '../EventUtils';
 
-const startTimeRaw = new Date('2020-04-25T09:34:00+00:00');
+// NOTE: After upgrade in KK-1017, this date needed the Finnish timezone, but the reason is unknown.
+const startTimeRaw = new Date('2020-04-25T09:34:00+03:00');
 const durationMinutes = 60;
 
 describe('EventUtils', () => {