Sbt won't run ScalaTest tests

Question

I'm running Scala 2.10.3 and sbt 0.13.5, and loosely following Twitter's scala sbt tutorial I've run into a minor issue. The unit test won't run at all.

my build.sbt:

libraryDependencies += "org.scalatest" % "scalatest_2.10" % "2.1.7" % "test"

my test class:

package com.twitter.sample

import collection.mutable.Stack
import org.scalatest._

object SimpleParserSpec extends FlatSpec with Matchers {
  "SimpleParser" should "work with basic tweet" in {
    val parser = new SimpleParser
    val tweet = """{"id":1, "text":"foo"}"""
    parser.parse(tweet) match {
      case Some(parsed) => {
        parsed.text should be ("foo")
        parsed.id should be (1)
      }
      case _ => fail("didn't parse tweet")
    }
  }
}

and this is the output of running sbt test in the project folder:

[info] Loading global plugins from C:\Users\Slench\.sbt\0.13\plugins
[info] Set current project to twitter-sbt (in build file:/C:/Users/Slench/Desktop/twitter-sbt/)
[info] Run completed in 36 milliseconds.
[info] Total number of tests run: 0
[info] Suites: completed 0, aborted 0
[info] Tests: succeeded 0, failed 0, canceled 0, ignored 0, pending 0
[info] No tests were executed.
[success] Total time: 0 s, completed 05-06-2014 20:19:11

I'm not sure what's going wrong, all the files are in the correct folders, everything compiles without error or warnings, yet it won't run my test... Any help?

Answer 1

Change your SimpleParserSpec from object to class and it should work.

In particular change the line

//bad
object SimpleParserSpec extends FlatSpec with Matchers

to

//good
class SimpleParserSpec extends FlatSpec with Matchers