Paul Butcher

Some while ago, I wrote a post about getting Scala 2.8.0.RC1, sbt and ScalaTest to work together. Well, things have moved on somewhat since then, so I thought it was time to update it.

1. Install sbt 0.10.1
2. Create the root directory for your project:

   $ mkdir aproject

3. Create a settings file in this directory called build.sbt containing:

   name := "A Project"
    
   version := "0.1"
    
   scalaVersion := "2.9.1"
    
   libraryDependencies ++= Seq(
     "org.scalatest" %% "scalatest" % "1.6.1" % "test"
   )

4. Create src/main/scala/Widget.scala containing:

   package com.example
    
   class Widget {
     def colour = "Blue"
     def disposition = "Awesome"
   }

5. Create src/test/scala/WidgetTest.scala containing:

   package com.example.test
    
   import org.scalatest.FunSuite
   import com.example.Widget
    
   class WidgetTest extends FunSuite {
    
     test("colour") {
       expect("Blue") { new Widget().colour }
     }
    
     test("disposition") {
       expect("Awesome") { new Widget().disposition }
     }
   }

6. Run your tests with sbt test. You should see:

   [info] WidgetTest:
   [info] - colour
   [info] - disposition
   [info] Passed: : Total 2, Failed 0, Errors 0, Passed 2, Skipped 0

7. Create src/main/scala/Main.scala containing:

   package com.example
    
   object Main {
     def main(args: Array[String]) {
       val w = new Widget()
       println("My new widget is "+ w.colour)
     }
   }

8. Run your program with sbt run. You should see:

   [info] Running com.example.Main 
   My new widget is Blue