public async Task WriteAsyncThrows()
 {
     var stream = new FrameRequestStream();
     await Assert.ThrowsAsync <NotSupportedException>(() => stream.WriteAsync(new byte[1], 0, 1));
 }
 public async Task WriteAsyncThrows()
 {
     var stream = new FrameRequestStream(Mock.Of <IHttpBodyControlFeature>());
     await Assert.ThrowsAsync <NotSupportedException>(() => stream.WriteAsync(new byte[1], 0, 1));
 }