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;-*- Mode:     Lisp -*-
;;;; Author:   Paul Dietz
;;;; Created:  Thu Oct 17 21:38:16 2002
;;;; Contains: Tests for EQUAL

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(deftest equal.1
  (loop for x in *symbols*
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        always (loop for y in *symbols*
                     always (if (eq x y) (equal x y)
                              (not (equal x y)))))
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  t)

(deftest equal.2
  (equalt (cons 'a 'b) (cons 'a 'b))
  t)

(deftest equal.3
  (equalt (cons 'a 'c) (cons 'a 'b))
  nil)

(deftest equal.4
  (equalt (vector 1 2 3) (vector 1 2 3))
  nil)

(deftest equal.5
  (loop for c in *characters*
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        always (loop for d in *characters*
                     always (if (eql c d) (equalt c d)
                              (not (equalt c d)))))
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  t)

(deftest equal.6
  (equalt (make-pathname :name (copy-seq "foo"))
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          (make-pathname :name (copy-seq "foo")))
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  t)

(deftest equal.7
  (equalt (make-pathname :name (copy-seq "foo"))
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          (make-pathname :name (copy-seq "bar")))
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  nil)

(deftest equal.8
  (equalt (copy-seq "abcd") (copy-seq "abcd"))
  t)

(deftest equal.9
  (equalt (copy-seq "abcd") (copy-seq "abc"))
  nil)

(deftest equal.10
  (equalt (copy-seq "abcd") (copy-seq "ABCD"))
  nil)

(deftest equal.11
  (equalt (copy-seq #*000110) (copy-seq #*000110))
  t)

(deftest equal.12
  (equalt (copy-seq #*000110) (copy-seq #*000111))
  nil)

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(deftest equal.13
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  :notes (:nil-vectors-are-strings)
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  (let ((x (make-array '(0) :element-type nil))
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        (y (make-array '(0) :element-type nil)))
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    (equalt x y))
  t)

(deftest equal.14
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  :notes (:nil-vectors-are-strings)
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  (and
   (equalt (make-array '(0) :element-type nil) "")
   (equalt "" (make-array '(0) :element-type nil)))
  t)

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(deftest equal.15
  (equalt (make-array '(0) :element-type 'character)
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          (make-array '(0) :element-type 'base-char))
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  t)

(deftest equal.16
  (equalt "abc" (make-array '(3) :element-type 'base-char
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                            :initial-contents '(#\a #\b #\c)))
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  t)

(deftest equal.17
  (let ((s (make-array '(10) :element-type 'character
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                       :initial-contents "0123456789"
                       :fill-pointer 3)))
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    (values (equalt s "012") (equalt "012" s)))
  t t)

(deftest equal.18
  (let ((b (make-array '(10) :element-type 'bit
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                       :initial-contents #*0110001110
                       :fill-pointer 5)))
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    (values (equalt #*01100 b) (equalt #*01100 b)))
  t t)

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(deftest equal.18b
    (let* ((l '(0 1 0 1 0))
           (a (make-array 5 :element-type 'bit :initial-contents l)))
      (equalt (make-array 4 :element-type 'bit :displaced-to a :displaced-index-offset 1)
              (make-array 4 :element-type 'bit :initial-contents (rest l))))
  t)

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(deftest equal.19
  (let ((s (make-array '(10) :element-type 'base-char
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                       :initial-contents "0123456789"
                       :fill-pointer 3)))
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    (values (equalt s "012") (equalt "012" s)))
  t t)

;;; Should add more pathname equality tests

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(deftest equal.order.1
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  (let ((i 0) x y)
    (values
     (equal (setf x (incf i)) (setf y (incf i)))
     i x y))
  nil 2 1 2)

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;;; Error tests

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(deftest equal.error.1
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  (signals-error (equal) program-error)
  t)
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(deftest equal.error.2
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  (signals-error (equal nil) program-error)
  t)
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(deftest equal.error.3
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  (signals-error (equal nil nil nil) program-error)
  t)