Lecture et initialisation de données json avec scalatest withFixture

Question

J'essaie d'utiliser la méthode withFixture pour initialiser mon var ip2GeoTestJson et l'utiliser tout au long de mes tests. J'ai été en mesure d'atteindre la logique souhaitée avec var year. Je crois que l'erreur que j'obtiens (analyse JNothing) est causée parce que le withFixture n'initialise pas mon ip2GeoTestJson avec le JSON.

Je reçois actuellement cette erreur:

*** RUN ABORTED *** 
    An exception or error caused a run to abort: java.lang.ClassCastException was thrown scenario("event.client_ip_address and event_header.client_ip_address both have values") -, construction cannot continue: "org.json4s.JsonAST$JNothing$ cannot be cast to org.json4s.JsonAST$JObject" (IP2GeoTestSuite.scala:51) 

code:

class IP2GeoTestSuite extends FeatureSpec with SparkContextFixture { 
    var ip2GeoTestJson: JValue = null 
    var year: String = null  

    feature("feature") { 
    scenario("scenario") { 
     println(ip2GeoTestJson) 
     assert(year != null) 
     assert(ip2GeoTestJson != null) 
    } 
    } 

    def withFixture(test: NoArgTest): org.scalatest.Outcome = { 
    year = test.configMap("year").asInstanceOf[String] 
    val ip2GeoConfigFile = test.configMap("config").asInstanceOf[String] 
    val ip2GeoUrl = getClass.getResourceAsStream(s"/$ip2GeoConfigFile") 
    val ip2GeoJsonString = Source.fromInputStream(ip2GeoUrl).getLines.mkString("") 
    System.out.println(ip2GeoJsonString) 
    ip2GeoTestJson = parse(ip2GeoJsonString) 
    try { 
     test() 
    } 
    } 
} 

Le code fonctionne très bien quand les lignes concernant ip2GeoData sont déplacés vers le haut de la classe comme si toutefois je dois hardcode le nom de fichier:

class IP2GeoTestSuite extends FeatureSpec with SparkContextFixture { 
    val ip2GeoConfigFile = "ip2geofile.json" 
    val ip2GeoUrl = getClass.getResourceAsStream(s"/$ip2GeoConfigFile") 
    val ip2GeoJsonString = Source.fromInputStream(ip2GeoUrl).getLines.mkString("") 
    System.out.println(ip2GeoJsonString) 
    val ip2GeoTestJson = parse(ip2GeoJsonString) 
    var year: String = null  

    feature("feature") { 
    scenario("scenario") { 
     println(ip2GeoTestJson) 
     assert(year != null) 
     assert(ip2GeoTestJson != null) 
    } 
    } 

    def withFixture(test: NoArgTest): org.scalatest.Outcome = { 
    year = test.configMap("year").asInstanceOf[String] 
    try { 
     test() 
    } 
    } 
} 

Answer 1

Définissez les paramètres avant chaque test (se e http://www.scalatest.org/user_guide/sharing_fixtures#withFixtureOneArgTest):

case class FixtureParams(year: String, ip2GeoTestJson: JValue) 

class IP2GeoTestSuite extends FeatureSpec with SparkContextFixture {  

    feature("feature") { 
    scenario("scenario") { 
     println(ip2GeoTestJson) 
     assert(year != null) 
     assert(ip2GeoTestJson != null) 
    } 
    } 

    override def withFixture(test: OneArgTest): org.scalatest.Outcome = { 
    val year = test.configMap("year").asInstanceOf[String] 
    val ip2GeoConfigFile = test.configMap("config").asInstanceOf[String] 
    val ip2GeoUrl = getClass.getResourceAsStream(s"/$ip2GeoConfigFile") 
    val ip2GeoJsonString = Source.fromInputStream(ip2GeoUrl).getLines.mkString("") 
    val fixtureParam = FixtureParam(year, parseJson(ip2GeoJsonString)) 
    try { 
    withFixture(test.toNoArgTest(fixtureParam)) 
    } finally { 
    // Close resourses to avoid memory leak and unpredictable behaviour 
     ip2GeoUrl.close() 
    } 
    } 
} 

Set params qu'une seule fois avant tout essai sera exécuté (http://www.scalatest.org/user_guide/sharing_fixtures#beforeAndAfter):

class IP2GeoTestSuite extends FeatureSpec with BeforeAndAfter { 

    var ip2GeoTestJson: JValue = null 
    var year: String = null 

    before { 
    // Load config manually because configMap isn't available here. 
    val config = ConfigFactory.load() 
    year = config.getString("year") 
    val ip2GeoConfigFile = "ip2geofile.json" 
    val ip2GeoUrl = getClass.getResourceAsStream(s"/$ip2GeoConfigFile") 
    val ip2GeoJsonString = Source.fromInputStream(ip2GeoUrl).getLines.mkString("") 
    ip2GeoUrl.close() 
    System.out.println(ip2GeoJsonString) 
    ip2GeoTestJson = parseJson(ip2GeoJsonString) 
    } 

    feature("feature") { 
    scenario("scenario") { 
     println(ip2GeoTestJson) 
     assert(year != null) 
     assert(ip2GeoTestJson != null) 
    } 
    } 
}