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Hello I am getting an error running a test for websocket client. Error in thread.

```io.ktor.client.call.NoTransformationFoundException: No transformation found: class io.ktor.utils.io.ByteBufferChannel (Kotlin reflection is not available) -&gt; class io.ktor.client.plugins.websocket.DefaultClientWebSocketSession (Kotlin reflection is not available)```

Are we to use the same `MockEngine` for websockets?

More errors when I ran the test against ios

`kotlinx.serialization.SerializationException: Serializer for class 'DefaultClientWebSocketSession' is not found.`
`Mark the class as @Serializable or provide the serializer explicitly.`

<@U017TSBJ2C9> I can't mark `DefaultClientWebSocketSession` as Serializable. Is there a workaround?

Could you please share the code of your test?

```private val mockEngine = MockEngine { _ -&gt;
        respond(
            content = """{"status":"successful", "message":"success", "data":"Yes"}""",
            status = HttpStatusCode.SwitchingProtocols,
            headers = headersOf(HttpHeaders.ContentType, "application/text")
        )
    }

@Test
    fun connect_success_ForConnection() = runTest {
        data.configure("url","user","path")
        val connectResponse = data.connectToServer().unBox()
        assertEquals("Connected", connectResponse)
    }```


The `connectToServer()` emits a message when a connection is established.
```while (true) {
                        emit("Connected")
         
                        val frame = incoming.receive()
                        if (frame is Frame.Text) {
                            emit(frame.readText())
                        }
                    }```

So you want to mock a server that accepts a Websockets connection?

Unfortunately, the `MockEngine` doesn’t have such capabilities and making `DefaultClientWebSocketSession` serializable won’t help. You may try to test your client from the other end by using the <https://ktor.io/docs/testing.html|testApplication>.