I'm trying to deserialize a mocked response to thi...

# serialization

[elect]

I'm trying to deserialize a mocked response to this:

@JvmInline
@kotlinx.serialization.Serializable(with = ResponseSerializer::class)
public value class Response<out T>
@PublishedApi
internal constructor(@PublishedApi
                     @Polymorphic
                     internal val value: Any?) : Serializable {

with

<http://Archicad26.client.post|Archicad26.client.post>("<http://localhost:19723>") {
    contentType(ContentType.Application.Json)
    setBody(command)
}.body()

but I get

Expected response body of the type 'class Response' but was 'class io.ktor.utils.io.ByteBufferChannel'

In response from <http://localhost:19723>

Response status 200 OK

Response header ContentType: null

Request header Accept: application/json

You can read how to resolve NoTransformationFoundException at FAQ:

https://ktor.io/docs/faq.html#no-transformation-found-exception

io.ktor.client.call.NoTransformationFoundException: Expected response body of the type 'class Response' but was 'class io.ktor.utils.io.ByteBufferChannel'

[elect]

the mocking:

Archicad26.client = HttpClient(MockEngine) {
        install(ContentNegotiation) {
            json(Json {
                prettyPrint = true
                isLenient = true
            })
        }
        engine {
            addHandler {
                respondOk(response)
            }
        }
    }

[elect]

the first FAQ says

Check that the Accept header in your request specifies the desired content type and that the Content-Type header in the server's response matches the expected type on the client side.

the request has contentType(ContentType.Application.Json). but how can I specify that on the response?

[elect]

indeed I just missed to set the contentType on the response

respond(response, headers = headersOf(HttpHeaders.ContentType, "application/json"))