A couple memory / process tests

cli_exit.dart

import 'package:rxdart/rxdart.dart';
import 'package:test/test.dart';

void main() {
    final int count = 10000000;
    final List<ExtraWrapper> observables = new List<ExtraWrapper>(count);
  
    for (int i = 0; i < count; i++) {
      observables[i] = new ExtraWrapper(new Observable<int>.just(1).call(onData: (_) {}));
    }
}

class ExtraWrapper {
  final Observable<int> observable;

  ExtraWrapper(this.observable);
}