Scala Specs2 (version 3.x) - How create and work with Notifier?

Question

How to correctly work with Scala Specs2 Notifier?

Haven't found any example to demonstrate some use cases of the Notifier trait.

Edit:

When using Notifier as follows, it works flawlessly:

class TestSpec extends TestUtils {

  "Arithmetic" should {
    "add two numbers" in {
      1 + 1 mustEqual 2
    }

    "add three numbers" in {
      1 + 1 + 1 mustEqual 3
    }
  }
}
class TestNotifier extends ConsoleNotifier

trait TestUtils extends Specification {
  args.report(notifier = "com.stuff.TestNotifier")
}

But, when i'm trying to add some new context creation for each test:

class TestSpec extends TestUtils {

  trait Context {
    val justNum = 4
  }

  "Arithmetic" should {
    "add two numbers" in new Context {
      1 + 1 mustEqual 2
    }

    "add three numbers" in new Context {
      1 + 1 + 1 mustEqual 3
    }
  }
}

errors appear:

Error:(12, 23) could not find implicit value for evidence parameter of type org.specs2.execute.AsResult[TestSpec.this.Context] "add two numbers" in new Context {

Answer 1

The 3.0.x documentation for Notifier is here (and the corresponding API is there).

Basically you need to define a class implementing the Notifier trait and then called it with the notifier argument:

sbt> testOnly *BinarySpec* -- notifier org.acme.reporting.FtpNotifier

You can have a look at the ConsoleNotifier for a simple example of an implementation.