public static async Task WriterIsRegistered(IWebSocketWriterHandle <string> handle,
Mock <IWebSocketWriter <string> > writer)
{
const string message = "baz";
await handle.SendAsync(message, CancellationToken.None);
writer.Verify(w => w.SendAsync(message, CancellationToken.None), Times.Once);
}
public static Task WriterIsNotRegistered(IWebSocketWriterHandle <string> handle) =>
Assert.ThrowsAsync <KeyNotFoundException>(async() => await handle.SendAsync("bar", CancellationToken.None));
