function testExec_ThrowsMissingSet() {
  var employeeTable = db.getSchema().getEmployee();
  var query = new lf.query.UpdateBuilder(hr.db.getGlobal(), employeeTable);
  query.where(employeeTable.jobId.eq('dummyJobId'));
  // 532: Invalid usage of update().
  return lf.testing.util.assertPromiseReject(532, query.exec());
}
Tests that Update#exec() fails if set() has not been called first.
@return {!IThenable}