### Question:
WebsocketProtocolClientFactory implements ProtocolClientFactory { @Override public WebsocketProtocolClient getClient() { WebsocketProtocolClient client = new WebsocketProtocolClient(); clients.add(client); return client; }  @Override String getScheme(); @Override WebsocketProtocolClient getClient(); @Override CompletableFuture<Void> destroy();  }### Answer:
@Test public void getClient() { assertThat(new WebsocketProtocolClientFactory().getClient(), instanceOf(WebsocketProtocolClient.class)); }