Question

对集团模式的测试对我而言还不是很清楚。因此，如果我有以下两个流控制器：

final _controller1 = StreamController();
final _controller2 = StreamController<bool>;

Sink get controller1Add = _controller1.sink;
Stream<bool> get controller2Out = _controller2.stream;

我想通过此功能进行测试：

submit() {
if (_controller1.value == null ||
        _controller1.value.isEmpty) {
          print(...)
      return;
    }else
       _controller2.sink.add(true);
    }

_controller2.stream应该为true，该怎么办？

我尝试过类似的事情：

  test("test", (){
    bloc.submit();
    expect(bloc.controller2Out, emitsAnyOf([true]));
  });

但是，当然，它没有用。

Answer 1

我已修改您的代码以使用RxDart的BehaviorSubject，它似乎可以工作。您正在使用StreamController，但由于出现错误，因为它没有value属性。

final _controller1 = BehaviorSubject<String>();
final _controller2 = BehaviorSubject<bool>();

Sink get controller1Add => _controller1.sink;  
Stream<bool> get controller2Out => _controller2.stream;

  submit() {
    if (_controller1.value == null || _controller1.value.isEmpty) {
      print('Error');
      _controller2.sink.add(false);
      return;
    } else {
      print('OK');
      _controller2.sink.add(true);
    }
  }

测试：

bloc.controller1Add.add('');
bloc.submit();
expect(bloc.controller2Out, emits(false));

bloc.controller1Add.add('test');
bloc.submit();
expect(bloc.controller2Out, emits(true));

bloc.controller1Add.add('');
bloc.submit();
expect(bloc.controller2Out, emits(false));

Flutter：BLoC，测试流

1 个答案: