JsonGenerator

import java.io.StringWriter

import scala.language.implicitConversions

import grapple.json.{ *, given }

val buf = StringWriter()
val out = JsonGenerator(buf)

try
 out.writeStartObject()          // start root object
 out.write("id", 1000)
 out.write("name", "lupita")
 out.writeStartArray("groups")   // start nested array
 out.write("lupita")
 out.write("admin")
 out.write("sudoer")
 out.writeEnd()                  // end nested array
 out.writeStartObject("info")    // start nested object
 out.write("home", "/home/lupita")
 out.write("storage", "8 GiB")
 out.writeEnd()                  // end nested object
 out.writeEnd()                  // end root object
 out.flush()

 val json = Json.parse(buf.toString)
 assert { json("id") == JsonNumber(1000) }
 assert { json("name") == JsonString("lupita") }
 assert { json("groups") == Json.arr("lupita", "admin", "sudoer") }
 assert { json("info") == Json.obj("home" -> "/home/lupita", "storage" -> "8 GiB") }
finally
 out.close()