对于以下代码段，适当的nunit测试用例应该是什么？

Question

以下功能用于检查播放操作是否可行。如果可以播放，则返回 true false 。对于这种方法，适当的nunit测试用例应该是什么？

     private bool CanPlay(object parameter)
    {
        if (AudioEngine != null)
        {
            return AudioEngine.CanPlay;
        }
        return false;
    }
    private void Play(object parameter)
    {
        if (AudioEngine != null && AudioEngine.ActiveStream!=null)
        {
            AudioEngine.Play();
        }
    }
    [Test]
    public void PlayAudioControlVMTestTrue()
    {
        AudioControlVm avm = new AudioControlVm();
        RelayCommand command = (RelayCommand)avm.PlayCommand;
        bool canPlay = command.CanExecute(avm);
        Assert.IsTrue(canPlay); 
    }

Answer 1

我做了如下：

    [Test]
    public void PlayAudioControlVMTestTrue()
    {
        AudioControlVm avm = new AudioControlVm();
        NAudioEngine.Instance.OpenFile(WAV_FILE_LOCATION);
        avm.AudioEngine.Play();
        RelayCommand command = (RelayCommand)avm.PlayCommand;
        bool canPlay = command.CanExecute(avm);
        Assert.IsTrue(canPlay);

        NAudioEngine.Instance.Stop();
    }