CODEWITHSUNDEEP
scalaintellij-ideasbt
BarryVenom
BarryVenom

Reputation: 95

Scala "not found: type" error

I am a scala noob and I am working on writing unit test cases for a scala spark program. When I try to run my scala unit test case using sbt test command, I get the following error

BasicACRStatsTest.scala:8: not found: type BasicACRStats

[error]   var basicStats: BasicACRStats = _
[error]                   ^
BasicACRStatsTest.scala:14: not found: type BasicACRStats
[error]     basicStats = new BasicACRStats
[error]                      ^
[error] two errors found
[error] (test:compile) Compilation failed

I am using intellij and when I am trying to refer the class BasicACRStats it shows Cannot resolve symbol BasicACRStats even though I have declared it in the correct package.

BasicACRStat.scala 

 package com.company.analytics
 import org.apache.hadoop.conf.Configuration
 import org.apache.hadoop.fs.{FileSystem, Path}
 import org.apache.hadoop.fs.FileSystem.Statistics
 import org.apache.spark.SparkConf
 import org.apache.spark.SparkContext
 import org.apache.spark.sql.hive.HiveContext
 import scala.collection.mutable.ArrayBuffer
 import collection.mutable


 object BasicACRStats {


   def main(args: Array[String]) {
   // Some code goes here
   }
 }

BasicACRStatsTest.scala

    import com.company.analytics
    import org.scalatest.FunSuite
    import org.scalatest.BeforeAndAfter
    import org.apache.spark.SparkConf
    import org.apache.spark.SparkContext

    class BasicACRStatsTest extends FunSuite with BeforeAndAfter {
      @transient var sc: SparkContext = _
      var basicStats: BasicACRStats = _
      // some code goes here
    }

Simple.sbt

name := "basicACRStats"
version := "1.0"
scalaVersion := "2.10.4"
libraryDependencies += "org.apache.spark" %% "spark-core" % "1.2.0"
libraryDependencies += "org.apache.spark" % "spark-sql_2.10" % "1.1.0"
libraryDependencies += "org.apache.spark" % "spark-hive_2.10" % "1.1.0"
libraryDependencies += "org.scalatest" % "scalatest_2.10" % "1.9.1" % "test"

Project Directory Structure

projectfoo
  .idea
  src
    main
      scala
        com
          company
            analytics
              BasicACRStats.scala
    test
      scala
        BasicACRStatTest.scala
  target
  simple.sbt

I am not sure on how to troubleshoot this issue, please share your thoughts and please let me know if you would require further information.

Upvotes: 5

Views: 17826

Answers (1)

johanandren
johanandren

Reputation: 11479

BasicACRStats seems to be an object in your sample code, not a class.

An object is a singleton and not a class/type. I has a type, in this case BasicACRStats.type, that there is only one instance of ever. Since it isn't a type calling new BasicACRStats is not valid Scala and neither is trying to use it as a type for a value.

What you want is probably to declare BasicACRStats a class. That would make the rest of your sample code make sense.

Upvotes: 3

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