public void InvalidBeginCapture()
{
var engine = new AudioEngine();
engine.Attach(this.provider, this.source, new AudioEngineCaptureOptions());
Assert.Throws <ArgumentNullException> (() => engine.BeginCapture(null, new ChannelInfo(1)));
Assert.Throws <ArgumentNullException> (() => engine.BeginCapture(this.source, (ChannelInfo)null));
Assert.Throws <ArgumentNullException> (() => engine.BeginCapture(this.source, (IEnumerable <IChannelInfo>)null));
Assert.Throws <ArgumentNullException> (() => engine.BeginCapture(null, UserInfoTests.GetTestUser()));
Assert.Throws <ArgumentNullException> (() => engine.BeginCapture(this.source, (IUserInfo)null));
Assert.Throws <ArgumentNullException> (() => engine.BeginCapture(this.source, (IEnumerable <IUserInfo>)null));
}