anchor.diff:      // Override and don't call the superclass onDone() to avoid printing the
       // "unittest-suite-..." boilerplate.
       Future.wait([stdout.close(), stderr.close()]).then((_) {
  +      _receivePort.close();
         exit(success ? 0 : 1);
       });
     }
  
positive.code: const int MAX_LINE = 80;
  
  class CompactVMConfiguration extends VMConfiguration {
    DateTime _start;
    int _pass = 0;
    int _fail = 0;
  
    void onInit() {
      // Override and don't call the superclass onInit() to avoid printing the
      // "unittest-suite-..." boilerplate.
    }
  
negative.code: 
  import 'dart:async';
  import 'dart:io';
  import 'dart:isolate';
  
  import 'unittest.dart';
  import 'vm_config.dart';
  