tests/list.pure.lisp

   1 ;;;; tests related to lists
   2
   3 ;;;; This software is part of the SBCL system. See the README file for
   4 ;;;; more information.
   5 ;;;;
   6 ;;;; While most of SBCL is derived from the CMU CL system, the test
   7 ;;;; files (like this one) were written from scratch after the fork
   8 ;;;; from CMU CL.
   9 ;;;;
  10 ;;;; This software is in the public domain and is provided with
  11 ;;;; absolutely no warranty. See the COPYING and CREDITS files for
  12 ;;;; more information.
  13
  14 (in-package :cl-user)
  15
  16 ;;; Since *another* BUTLAST problem was reported (anonymously!) on the
  17 ;;; SourceForge summary page magical bugs web interface 2001-09-01, it
  18 ;;; looks as though it's past time to start accumulating regression
  19 ;;; tests for these.
  20 (dolist (testcase
  21          '((:args ((1 2 3 4 5))   :result (1 2 3 4))
  22            (:args ((1 2 3 4 5) 6) :result nil)
  23            (:args (nil)           :result nil)
  24            (:args ((1 2 3) 0)     :result (1 2 3))
  25            (:args ((1 2 3) 1)     :result (1 2))
  26            (:args ((1 2 3))       :result (1 2))
  27            (:args ((1 2 3) 2)     :result (1))
  28            (:args ((1 2 3) 3)     :result nil)
  29            (:args ((1 2 3) 4)     :result nil)
  30            (:args ((1 2 3 . 4) 0) :result (1 2 3 . 4))
  31            (:args ((1 2 3 . 4) 1) :result (1 2))
  32            (:args ((1 2 3 . 4))   :result (1 2))
  33            (:args ((1 2 3 . 4) 2) :result (1))
  34            (:args ((1 2 3 . 4) 3) :result nil)
  35            (:args ((1 2 3 . 4) 4) :result nil)))
  36   (destructuring-bind (&key args result) testcase
  37     (destructuring-bind (list &rest rest) args
  38       ;; Test with BUTLAST.
  39       (let ((actual-result (apply #'butlast args)))
  40         (when (and (consp list) (eq actual-result list))
  41           (error "not a copy in BUTLAST for ~S" args))
  42         (unless (equal actual-result result)
  43           (error "failed BUTLAST for ~S" args)))
  44       ;; Test with NBUTLAST.
  45       (let* ((copied-list (copy-list list))
  46              (actual-result (apply #'nbutlast copied-list rest)))
  47         (unless (equal actual-result result)
  48           (error "failed NBUTLAST for ~S" args))))))
  49
  50 (multiple-value-bind (result error)
  51     (ignore-errors (apply #'butlast (list t)))
  52   (assert (null result))
  53   (assert (typep error 'type-error)))
  54
  55 ;;; reported by Paul Dietz on cmucl-imp: LDIFF does not check type of
  56 ;;; its first argument
  57 (assert (not (ignore-errors (ldiff 1 2))))
  58
  59 ;;; evaluation order in PUSH, PUSHNEW
  60 (let ((a (map 'vector #'list '(a b c))))
  61   (let ((i 0))
  62     (pushnew (incf i) (aref a (incf i)))
  63     (assert (equalp a #((a) (b) (1 c))))))
  64
  65 (symbol-macrolet ((s (aref a (incf i))))
  66     (let ((a (map 'vector #'list '(a b c))))
  67       (let ((i 0))
  68         (push t s)
  69         (assert (equalp a #((a) (t b) (c))))
  70         (pushnew 1 s)
  71         (assert (equalp a #((a) (t b) (1 c))))
  72         (setq i 0)
  73         (assert (eql (pop s) 't))
  74         (assert (equalp a #((a) (b) (1 c)))))))