MockCallInterceptor working in kotlin using Gson

MockCallInterceptor.kt

class MockCallInterceptor<T> constructor(val value: T) : Interceptor {
    override fun intercept(chain: Interceptor.Chain): Response {
        val uri = chain.request().url().uri().toString()
        val responseString: String = Gson().toJson(T::class.java)

        val response = Response.Builder()
            .code(200)
            .message(responseString)
            .request(chain.request())
            .protocol(Protocol.HTTP_1_0)
            .body(
                ResponseBody.create(
                    MediaType.parse("application/json"),
                    responseString
                )
            )
            .addHeader("content-type", "application/json")
            .build()

        return response
    }
}