def expr_def = 4

def fun_expr_def (x) = x + 5

def test_def (n):
    shell as p on n:
	echo $expr_def

    expect from p:
	/4/

def fun_test_def (n) first x:
    shell as p on n:
	echo ${expr_def + x}

    expect from p:
	/${4 + x}/

test Test:
    node n
    test_def (n)
    fun_test_def (n) first 7