Demonstrating use of implicit parameters for dependency injection

implicit.scala

object People {
  implicit val columnFamily: ColumnFamily = getColumnFamily
  
  def getPersonByName(name: String)(implicit cf: ColumnFamily) = ...
}

class ProdUsage {
  // uses ColumnFamily from object People
  def foo = People.getPersonByName("Jordan") 
}

class PeopleSpec extends FunSpec {
  it("can use a different C* column family than the default one") {
    implicit val testCF = getTestColumnFamily
    // uses ColumnFamily from local scope, testCF
    People.getPersonByName("James")
  }
}