JsonParserSpec.scala

/*
 * Copyright (C) 2009-2013 Mathias Doenitz, Alexander Myltsev
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.parboiled2.examples

import scala.util.{Failure, Success}
import utest._
import spray.json.{JsonParser => _, _}
import org.parboiled2._

object JsonParserSpec extends TestSuite {

  val tests = Tests{

    "The JsonParser" - {
      "parse 'null' to JsNull" - {
        parse("null") ==> JsNull
      }
      "parse 'true' to JsTrue" - {
        parse("true") ==> JsTrue
      }
      "parse 'false' to JsFalse" - {
        parse("false") ==> JsFalse
      }
      "parse '0' to JsNumber" - {
        parse("0") ==> JsNumber(0)
      }
      "parse '1.23' to JsNumber" - {
        parse("1.23") ==> JsNumber(1.23)
      }
      "parse '-1E10' to JsNumber" - {
        parse("-1E10") ==> JsNumber("-1E+10")
      }
      "parse '12.34e-10' to JsNumber" - {
        parse("12.34e-10") ==> JsNumber("1.234E-9")
      }
      "parse \"xyz\" to JsString" - {
        parse("\"xyz\"") ==> JsString("xyz")
      }
      "parse escapes in a JsString" - {
        parse(""""\"\\/\b\f\n\r\t"""") ==> JsString("\"\\/\b\f\n\r\t")
        parse("\"L\\" + "u00e4nder\"") ==> JsString("Länder")
      }
      "properly parse a simple JsObject" - (
        parse(""" { "key" :42, "key2": "value" }""") ==>
          JsObject("key" -> JsNumber(42), "key2" -> JsString("value"))
        )
      "properly parse a simple JsArray" - (
        parse("""[null, 1.23 ,{"key":true } ] """) ==>
          JsArray(JsNull, JsNumber(1.23), JsObject("key" -> JsTrue))
        )
    }
  }

  def parse(s: String): JsValue = {
    val parser = new JsonParser(s)
    parser.Json.run() match {
      case Success(result)        => result
      case Failure(e: ParseError) => sys.error(parser.formatError(e, new ErrorFormatter(showTraces = true)))
      case Failure(e)             => throw e
    }
  }
}