CODEWITHSUNDEEP
scalaintellij-ideasbt
Nobbynob Littlun
Nobbynob Littlun

Reputation: 381

Why is my Scala class not visible to its matching test class?

I am starting out in Scala with SBT, making a Hello World program.

Here's my project layout:

enter image description here

I've made sure to download the very latest JDK and Scala, and configure my Project Settings. Here's my build.sbt:

name := "Coursera_Scala"

version := "1.0"

scalaVersion := "2.11.6"

libraryDependencies += "org.scalatest" % "scalatest_2.11" % "2.2.4" % "test"

Hello.scala itself compiles okay:

package demo

class Hello {
  def sayHelloTo(name: String) = "Hello, $name!"
}

However, my accompanying HelloTest.scala does not. Here's the test:

package demo

import org.scalatest.FunSuite

class HelloTest extends FunSuite {

  test("testSayHello") {
    val result = new Hello.sayHelloTo("Scala")
    assert(result == "Hello, Scala!")
  }

}

Here's the error:

Error:(8, 22) not found: value Hello
    val result = new Hello.sayHello("Scala")
                 ^

In addition to the compile error, Intellij shows errors "Cannot resolve symbol" for the symbols Hello, assert, and ==. This leads me to believe that the build is set up incorrectly, but then wouldn't there be an error on the import?

Upvotes: 2

Views: 1466

Answers (2)

Mehmet Akif Tütüncü
Mehmet Akif Tütüncü

Reputation: 729

Or you can use new Hello().sayHelloTo(...). Writing () should create a new instance and then call the method.

Upvotes: 1

gzm0
gzm0

Reputation: 14842

The problem is this expression:

new Hello.sayHelloTo("Scala")

This creates a new instance of the class sayHelloTo defined on the value Hello. However, there is no value Hello, just the class Hello.

You want to write this:

(new Hello).sayHelloTo("Scala")

This creates a new instance of the class Hello and calls sayHelloTo on the instance.

Upvotes: 3

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