Ktor HttpClient模拟失败

Question

我试图用这样的HttpClient创建一个Ktor (1.3.1) JsonFeature模拟：

@Test
fun mockFailure() = runBlocking {
    val mock = MockEngine { call ->
        respond("{}",
                HttpStatusCode.OK,
                headersOf("Content-Type", ContentType.Application.Json.toString()))
    }

    val client = HttpClient(mock) {
        install(JsonFeature) {
            serializer = KotlinxSerializer()
        }
    }

    val resp =  client.get<JsonObject>("dsf")
}

它似乎正确地处理了它，但随后我得到了以下错误：

io.ktor.client.call.NoTransformationFoundException: No transformation found: class kotlinx.coroutines.io.ByteBufferChannel -> class kotlinx.serialization.json.JsonObject
with response from http://localhost/dsf:
status: 200 OK
response headers: 
Content-Type: application/json


    at io.ktor.client.call.HttpClientCall.receive(HttpClientCall.kt:79)

Answer 1

尝试在HttpClient块中安装客户端内容协商插件：

val client = HttpClient(mock) {
        install(JsonFeature) {
            serializer = KotlinxSerializer()
        }
        //Here
        install(ContentNegotiation) {
            json(Json {
                prettyPrint = true
                isLenient = true
            })
        }
}

所需依赖项implementation("io.ktor:ktor-client-content-negotiation:$ktor_version")

Json序列化implementation("io.ktor:ktor-serialization-kotlinx-json:$ktor_version")

还将最后一行更改为val resp = client.get<JsonObject>("dsf").body()