(require :cl-ppcre)
(defun test_1 () 1)
(defun test_2 () 2)
(defun test_3 () 3)

(loop for f in (ppcre:regex-apropos-list "^test_" *package*)
   collect (cons f (funcall f)))        ; => ((TEST_1 . 1) (TEST_3 . 3) (TEST_2 . 2))