sclass TestResult {
  double okPercentage; // 0 to 100
  S description;
  PersistableThrowable e;

  *() {}
  *(bool ok) { this(null, ok); }
  *(S *description, double *okPercentage) {}
  *(S *description, bool ok) { okPercentage = ok ? 100 : 0; }
  *(S *description, Throwable e) { this.e = persistableThrowable(e); }
  
  bool ok() { ret okPercentage >= 100; }
  
  toString {
    ret ifloor(okPercentage) + "%: " + or2(description, "Some test") + (e != null ? " [" + e + "]" : "");
  }
}