Fix code duplication

Author: ehmicky

test/helpers/testing/jasmine/main.js

@@ -6,7 +6,8 @@ const { eventName } = getOptions()
 
 describe('should make tests fail', () => {
   it(`on ${eventName}`, () => {
+    const promise = EVENTS_MAP[eventName].emit()
     // eslint-disable-next-line no-empty-function, max-nested-callbacks
-    EVENTS_MAP[eventName].emit().catch(() => {})
+    promise.catch(() => {})
   })
 })