def test_ast_good_cut():
 can_compile(u'(cut x)')
 can_compile(u'(cut x y)')
 can_compile(u'(cut x y z)')
 can_compile(u'(cut x y z t)')

def test_ast_good_cut ( ) : can_compile ( u'(cut x)' ) can_compile ( u'(cut x y)' ) can_compile ( u'(cut x y z)' ) can_compile ( u'(cut x y z t)' )
make sure ast can compile valid cut .