;-*- Mode:     Lisp -*-
;;;; Author:   Paul Dietz
;;;; Created:  Mon Apr 19 05:53:48 2004
;;;; Contains: Tests of string printing

(in-package :cl-test)



(deftest print.string.1
  (with-standard-io-syntax
   (write-to-string "" :escape nil :readably nil))
  "")

(deftest print.string.2
  (with-standard-io-syntax
   (loop for c across +standard-chars+
         for s1 = (string c)
         for s2 = (write-to-string s1 :escape nil :readably nil)
         unless (string= s1 s2)
         collect (list c s1 s2)))
  nil)

(deftest print.string.3
  (with-standard-io-syntax
   (loop for i below 256
         for c = (code-char i)
         when c
         nconc
         (let* ((s1 (string c))
                (s2 (write-to-string s1 :escape nil :readably nil)))
           (unless (string= s1 s2)
             (list (list c s1 s2))))))
  nil)

(deftest print.string.4
  (with-standard-io-syntax
   (loop for c across +standard-chars+
         for s1 = (string c)
         for s2 = (write-to-string s1 :escape t :readably nil)
         unless (or (find c "\"\\") (string= (concatenate 'string "\"" s1 "\"") s2))
         collect (list c s1 s2)))
  nil)

(deftest print.string.5
  (with-standard-io-syntax
   (write-to-string "\"" :escape t :readably nil))
  "\"\\\"\"")

(deftest print.string.6
  (with-standard-io-syntax
   (write-to-string "\\" :escape t :readably nil))
  "\"\\\\\"")

;;; Not affected by *print-array*

(deftest print.string.7
  (with-standard-io-syntax
   (loop for s1 in (remove-if-not #'stringp *universe*)
         for s2 = (write-to-string s1 :escape nil :readably nil)
         for s3 = (write-to-string s1 :array t :escape nil :readably nil)
         unless (string= s2 s3)
         collect (list s1 s2 s3)))
  nil)

(deftest print.string.8
  (with-standard-io-syntax
   (loop for s1 in (remove-if-not #'stringp *universe*)
         for s2 = (write-to-string s1 :escape t :readably nil)
         for s3 = (write-to-string s1 :array t :escape t :readably nil)
         unless (string= s2 s3)
         collect (list s1 s2 s3)))
  nil)

;;; Only active elements of the string are printed

(deftest print.string.9
  (let* ((s (make-array '(10) :fill-pointer 5 :element-type 'character
                       :initial-contents "abcdefghij"))
         (result
          (with-standard-io-syntax
           (write-to-string s :escape nil :readably nil))))
    (or (and (string= result "abcde") t)
        result))
  t)

(deftest print.string.10
  (let* ((s (make-array '(10) :fill-pointer 5 :element-type 'character
                       :initial-contents "aBcDefGHij"))
         (result
          (with-standard-io-syntax
           (write-to-string s :escape t :readably nil))))
    (or (and (string= result "\"aBcDe\"") t)
        result))
  t)

(deftest print.string.11
  (let* ((s (make-array '(8) :element-type 'base-char
                        :initial-contents "abcdefgh"
                        :adjustable t))
         (result
          (with-standard-io-syntax
           (write-to-string s :escape t :readably nil))))
    (or (and (string= result "\"abcdefgh\"") t)
        result))
  t)

(deftest print.string.12
  (let* ((s1 (make-array '(8) :element-type 'character
                         :initial-contents "abcdefgh"))
         (s2 (make-array '(4) :element-type 'character
                         :displaced-to s1
                         :displaced-index-offset 2))
         (result
          (with-standard-io-syntax
           (write-to-string s2 :escape t :readably nil))))
    (or (and (string= result "\"cdef\"") t)
        result))
  t)

;;; *print-array* should not affect string printing

(deftest print.string.13
  (with-standard-io-syntax
   (write-to-string "1234" :array nil :readably nil :escape t))
  "\"1234\"")


;;; The ever-popular nil string

(deftest print.string.nil.1
  :notes (:nil-vectors-are-strings)
  (let ((s (make-array '(0) :element-type nil)))
    (write-to-string s :escape nil :readably nil))
  "")

(deftest print.string.nil.2
  :notes (:nil-vectors-are-strings)
  (let ((s (make-array '(0) :element-type nil)))
    (write-to-string s :escape t :readably nil))
  "\"\"")


;;; Random tests

(deftest print.string.random.1
  (trim-list
   (loop for len = (1+ (random 5))
         for s = (coerce (loop repeat len
                               collect (random-from-seq +standard-chars+))
                         'string)
         repeat 1000
         append (randomly-check-readability s))
   10)
  nil)