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;;;; miscellaneous side-effectful tests of the MOP
;;;; This software is part of the SBCL system. See the README file for
;;;; more information.
;;;;
;;;; While most of SBCL is derived from the CMU CL system, the test
;;;; files (like this one) were written from scratch after the fork
;;;; from CMU CL.
;;;;
;;;; This software is in the public domain and is provided with
;;;; absolutely no warranty. See the COPYING and CREDITS files for
;;;; more information.
;;; this file tests that user-defined methods can be used in
;;; combination (ahem) with hairy bits of method-combination.
;;; Simple test case from Pascal Costanza
(defgeneric test (arg)
(:method (arg) (format t "~D" arg) arg))
(defun define-around-test ()
(multiple-value-bind
(method-lambda method-args)
(sb-mop:make-method-lambda
#'test (sb-mop:class-prototype (sb-mop:generic-function-method-class #'test))
'(lambda (arg) (call-next-method)) ())
(let ((method (apply #'make-instance
(sb-mop:generic-function-method-class #'test)
:qualifiers '(:around)
:lambda-list '(arg)
:specializers (list (find-class 't))
:function (compile nil method-lambda)
method-args)))
(sb-mop:add-method #'test method))))
(defun run-test ()
(define-around-test)
(test 42))
(with-test (:name (:mop-20 1))
(assert (string= (with-output-to-string (*standard-output*)
(assert (= (run-test) 42)))
"42")))
;;; Slightly more complex test cases, from Bruno Haible (sbcl-devel
;;; 2004-06-11). First the setup.
(defclass user-method (standard-method) (myslot))
(defmacro def-user-method (name &rest rest)
(let* ((lambdalist-position (position-if #'listp rest))
(qualifiers (subseq rest 0 lambdalist-position))
(lambdalist (elt rest lambdalist-position))
(body (subseq rest (+ lambdalist-position 1)))
(required-part
(subseq lambdalist 0
(or (position-if #'(lambda (x)
(member x lambda-list-keywords))
lambdalist)
(length lambdalist))))
(specializers
(mapcar #'find-class
(mapcar #'(lambda (x) (if (consp x) (second x) 't))
required-part)))
(unspecialized-required-part
(mapcar #'(lambda (x) (if (consp x) (first x) x)) required-part))
(unspecialized-lambdalist
(append unspecialized-required-part
(subseq required-part (length required-part)))))
`(progn
(sb-mop:add-method #',name
(make-instance 'user-method
:qualifiers ',qualifiers
:lambda-list ',unspecialized-lambdalist
:specializers ',specializers
:function
#'(lambda (arguments next-methods-list)
(flet ((next-method-p () next-methods-list)
(call-next-method (&rest new-arguments)
(unless new-arguments (setq new-arguments arguments))
(if (null next-methods-list)
(error "no next method for arguments ~:s" arguments)
(funcall (sb-mop:method-function (first next-methods-list))
new-arguments (rest next-methods-list)))))
(apply #'(lambda ,unspecialized-lambdalist ,@body) arguments)))))
',name)))
;;; this one has always worked, as it does not involve MAKE-METHOD in
;;; its effective method.
(progn
(defgeneric test-um03 (x))
(defmethod test-um03 ((x integer))
(list* 'integer x (not (null (next-method-p))) (call-next-method)))
(def-user-method test-um03 ((x rational))
(list* 'rational x (not (null (next-method-p))) (call-next-method)))
(defmethod test-um03 ((x real))
(list 'real x (not (null (next-method-p))))))
(with-test (:name (:mop-20 2))
(assert (equal (test-um03 17) '(integer 17 t rational 17 t real 17 nil))))
;;; these two used to fail in slightly different ways
(progn
(defgeneric test-um10 (x))
(defmethod test-um10 ((x integer))
(list* 'integer x (not (null (next-method-p))) (call-next-method)))
(defmethod test-um10 ((x rational))
(list* 'rational x (not (null (next-method-p))) (call-next-method)))
(defmethod test-um10 ((x real))
(list 'real x (not (null (next-method-p)))))
(defmethod test-um10 :after ((x real)))
(def-user-method test-um10 :around ((x integer))
(list* 'around-integer x (not (null (next-method-p))) (call-next-method)))
(defmethod test-um10 :around ((x rational))
(list* 'around-rational x (not (null (next-method-p))) (call-next-method)))
(defmethod test-um10 :around ((x real))
(list* 'around-real x (not (null (next-method-p))) (call-next-method))))
(with-test (:name (:mop-20 3))
(assert (equal (test-um10 17)
'(around-integer 17 t
around-rational 17 t
around-real 17 t
integer 17 t
rational 17 t
real 17 nil))))
(progn
(defgeneric test-um12 (x))
(defmethod test-um12 ((x integer))
(list* 'integer x (not (null (next-method-p))) (call-next-method)))
(defmethod test-um12 ((x rational))
(list* 'rational x (not (null (next-method-p))) (call-next-method)))
(defmethod test-um12 ((x real))
(list 'real x (not (null (next-method-p)))))
(defmethod test-um12 :after ((x real)))
(defmethod test-um12 :around ((x integer))
(list* 'around-integer x (not (null (next-method-p))) (call-next-method)))
(defmethod test-um12 :around ((x rational))
(list* 'around-rational x (not (null (next-method-p))) (call-next-method)))
(def-user-method test-um12 :around ((x real))
(list* 'around-real x (not (null (next-method-p))) (call-next-method))))
(with-test (:name (:mop-20 4))
(assert (equal (test-um12 17)
'(around-integer 17 t
around-rational 17 t
around-real 17 t
integer 17 t
rational 17 t
real 17 nil))))
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