func TestCalc(t *testing.T) {
if factorial.Calc(5) != 120 {
t.Errorf("Error calculation factorial\nExpected 120 was %d\n", factorial.Calc(5))
}
if factorial.Calc(0) != 1 {
t.Errorf("Error calculation factorial\nExpected 1 was %d\n", factorial.Calc(0))
}
if factorial.Calc(1) != 1 {
t.Errorf("Error calculation factorial\nExpected 1 was %d\n", factorial.Calc(1))
}
}
func main() {
formated_output.Printf("Packeges samples \n")
var n = 5
formated_output.Printf("Number - %d Factorial - %d \n", n, factorial.Calc(n))
}