Cannot run tests via sbt in Scala - scala

Question

I am trying out a simple HelloWorld example. Here is my directory structure:
hello
build.sbt
main
scala
Hello.scala
test
scala
HelloTest.scala
Hello.scala contains a sayHello function that I am trying to call from a simple test in HelloTest.scala. Here is my build.sbt:
name := "Hello"
organization := "tycon"
scalaVersion := "2.11.2"
libraryDependencies += "org.scalatest" %% "scalatest" % "2.2.1" % "test"
And here is an sbt run that does not run any tests:
$ sbt
[info] Set current project to scala (in build
file:~/git/scala/hello/main/scala/)
> compile
[info] Updating
{file:~/git/scala/hello/main/scala/}scala...
[info] Resolving org.fusesource.jansi#jansi;1.4 ...
[info] Done updating.
[info] Compiling 1 Scala source to
~/git/scala/hello/main/scala/target/scala-2.10/classes...
[success] Total time: 3 s, completed Sep 17, 2014 9:04:00 AM
> test
[info] Passed: Total 0, Failed 0, Errors 0, Passed 0
[info] No tests to run for test:test
[success] Total time: 0 s, completed Sep 17, 2014 9:04:03 AM
I tried suggestions from other answers: replaced %% with % and substituted scalatest_2.10 for scalatest in libraryDependencies, and changed scalaVersion to 2.10.0. None of them worked. And yes, I was reloading each time build.sbt changed.
I believe that I am missing something very basic. I would appreciate any help. I am new to Scala.
Edit: For the sake of completeness, here are the two scala files:
Hello.scala:
trait Hello {
def sayHello () = {
println ("Hello, World!")
}
}
HelloTest:scala:
import org.scalatest.FunSuite
class HelloTest extends FunSuite with Hello {
test("say hello") {
sayHello()
}
}
Edit2: I changed the directory structure as suggested by ajozwik and Gabriele, but sbt still doesn't run the test:
~/git/scala/hello/src/main/scala$ sbt
[info] Set current project to scala (in build
file:~/git/scala/hello/src/main/scala/)
> test
[info] Passed: Total 0, Failed 0, Errors 0, Passed 0
[info] No tests to run for test:test
[success] Total time: 1 s, completed Sep 17, 2014 9:36:24 AM

Answer 1

The directory structure should be
hello
build.sbt
src
main
scala
Hello.scala
test
scala
HelloTest.scala
i.e. you're missing the outer src directory.
Also, you need to run sbt from the root of your project, and not from within a subfolder.