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;-*- Mode: Lisp -*-
;;;; Author: Paul Dietz
;;;; Created: Tue Jan 21 06:20:51 2003
;;;; Contains: Tests for ARRAY-DISPLACEMENT
(in-package :cl-test)
;;; The tests in make-array.lsp also test array-displacement
;;; The standard is contradictory about whether arrays created with
;;; :displaced-to NIL should return NIL as their primary value or
;;; not. I will assume (as per Kent Pitman's comment on comp.lang.lisp)
;;; that an implementation is free to implement all arrays as actually
;;; displaced. Therefore, I've omitted all the tests of not-expressly
;;; displaced arrays.
;;; Behavior on expressly displaced arrays
(deftest array-displacement.7
(let* ((a (make-array '(10)))
(b (make-array '(10) :displaced-to a)))
(multiple-value-bind* (dt disp)
(array-displacement b)
(and (eqt a dt)
(eqlt disp 0))))
t)
(deftest array-displacement.8
(let* ((a (make-array '(10)))
(b (make-array '(5) :displaced-to a :displaced-index-offset 2)))
(multiple-value-bind* (dt disp)
(array-displacement b)
(and (eqt a dt)
(eqlt disp 2))))
t)
(deftest array-displacement.9
(let* ((a (make-array '(10) :element-type 'base-char))
(b (make-array '(5) :displaced-to a :displaced-index-offset 2
:element-type 'base-char)))
(multiple-value-bind* (dt disp)
(array-displacement b)
(and (eqt a dt)
(eqlt disp 2))))
t)
(deftest array-displacement.10
(let* ((a (make-array '(10) :element-type 'base-char))
(b (make-array '(5) :displaced-to a
:element-type 'base-char)))
(multiple-value-bind* (dt disp)
(array-displacement b)
(and (eqt a dt)
(eqlt disp 0))))
t)
(deftest array-displacement.11
(let* ((a (make-array '(10) :element-type 'bit))
(b (make-array '(5) :displaced-to a :displaced-index-offset 2
:element-type 'bit)))
(multiple-value-bind* (dt disp)
(array-displacement b)
(and (eqt a dt)
(eqlt disp 2))))
t)
(deftest array-displacement.12
(let* ((a (make-array '(10) :element-type 'bit))
(b (make-array '(5) :displaced-to a
:element-type 'bit)))
(multiple-value-bind* (dt disp)
(array-displacement b)
(and (eqt a dt)
(eqlt disp 0))))
t)
(deftest array-displacement.13
(let* ((a (make-array '(10) :element-type '(integer 0 255)))
(b (make-array '(5) :displaced-to a :displaced-index-offset 2
:element-type '(integer 0 255))))
(multiple-value-bind* (dt disp)
(array-displacement b)
(and (eqt a dt)
(eqlt disp 2))))
t)
(deftest array-displacement.14
(let* ((a (make-array '(10) :element-type '(integer 0 255)))
(b (make-array '(5) :displaced-to a
:element-type '(integer 0 255))))
(multiple-value-bind* (dt disp)
(array-displacement b)
(and (eqt a dt)
(eqlt disp 0))))
t)
(deftest array-displacement.15
(let* ((a (make-array '(10) :initial-contents '(a b c d e f g h i j)))
(b (make-array '(5) :displaced-to a :displaced-index-offset 2)))
(macrolet
((%m (z) z))
(multiple-value-bind
(x y)
(array-displacement (expand-in-current-env (%m b)))
(values (eqlt x a) y))))
t 2)
;;; FIXME: Add tests for other kinds of specialized arrays
;;; (character, other integer types, float types, complex types)
(deftest array-displacement.order.1
(let* ((a (make-array '(10)))
(b (make-array '(10) :displaced-to a))
(i 0))
(multiple-value-bind* (dt disp)
(array-displacement (progn (incf i) b))
(and (eql i 1)
(eqt a dt)
(eqlt disp 0))))
t)
;;; Error tests
(deftest array-displacement.error.1
(signals-error (array-displacement) program-error)
t)
(deftest array-displacement.error.2
(signals-error (array-displacement #(a b c) nil) program-error)
t)
(deftest array-displacement.error.3
(check-type-error #'array-displacement #'arrayp)
nil)
(deftest array-displacement.error.4
(signals-type-error x nil (array-displacement x))
t)
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