root/trunk/ProjectFortress/tests/booleanGuard.fss

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component booleanGuard
import List.{...}
export Executable

run(args:String...):() = do
    a = <|0+0,1,2,3,5,6,7|>
    c = <| x | x <- a, true |>
    assert(c,a," true")
    b = <| x | x <- a, x>2 |>
    assert(b,a.filter(fn (x)=>x>2)," x>2")
    d = <| x | x <- a, false |>
    assert(d.isEmpty(), "not isEmpty false")
    e = <| 17 | _ <- true |>
    assert(e,<|17|>,"true =/= <|17|>")
    q = <| q | q <- Just[\(ZZ32,ZZ32)\](17,3) |>
    assert(q,<|(17,3),(17,3)|>.drop(1), " Just")
    f = <| x | x <- true |>
    assert(f,<|(),()|>.drop(1), " void")
  end

end