Testing itertool's Map function

Let’s test itertool's Map function by passing it a collection of words of various lengths and a literal function to operate on each word to return its length:

package itertools
import (
     "testing"
     "reflect"
     . "github.com/yanatan16/itertools"
)

Let's not forget to run go get -u github.com/yanatan16/itertools to download the itertools package along with its dependencies.