'fieldName', ]; $newFieldKey = 'newFieldKey'; $newFieldValue = 'newFieldValue'; $event = new MauticSyncFieldsLoadEvent($objectName, $fields); $this->assertSame($objectName, $event->getObjectName()); $this->assertSame($fields, $event->getFields()); $event->addField($newFieldKey, $newFieldValue); $this->assertSame( array_merge($fields, [$newFieldKey => $newFieldValue]), $event->getFields() ); } }