Abfangen unbehandelter Store-Fehler in Test-Suiten über EventTarget-Brücken

export class StoreErrorBridge extends EventTarget {
  dispatchFailure(error) {
    this.dispatchEvent(new CustomEvent('store-error', { detail: error }));
  }
}
 
export function assertStoreThrows(storeBus, expectedMessage) {
  return new Promise((resolve, reject) => {
    const handler = (event) => {
      storeBus.removeEventListener('store-error', handler);
      if (event.detail.message.includes(expectedMessage)) resolve();
      else reject(new Error(`Unexpected error message: ${event.detail.message}`));
    };
    storeBus.addEventListener('store-error', handler);
  });
}