/usr/share/scsh-0.6/scsh/env-test-code.scm is in scsh-common-0.6 0.6.7-8.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 | ; TEST-CODE ***********************************************************************
; all procedures return either #t or #f
; Deleting a variable via (setenv var #f) cannot be tested, since
; getenv returns #f in both cases: a) deleted variable or b) variable set to #f
; OK
(define (setenv-test var val)
(setenv var val)
(equal? (getenv var) val))
; getenv is tested with the same procedure than setenv
; OK 2001-04-09 16:21
(define getenv-test setenv-test)
; env->alist-test test, if
; env->alist is an alist of pairs of string and if
; a previously set variable has the set value
; OK 2001-04-09 16:21
(define (env->alist-test var val)
(setenv var val)
(let ((alist (env->alist)))
(and (every (lambda (pair) ; syntactical correctness
(and (pair? pair) ; entry is a pair
(not (list? pair)) ; and not a list
(string? (car pair)) ; car is a string...
(or (string? (cdr pair)) ; ...cdr is either a string...
(string-list? (cdr pair))))) ; ...or a string-list
alist)
(equal? (cdr (assoc var alist))
val)))) ; previously set variable correctly present
; checks if alist->enc really sets a new environment
; by this way, it checks if a string list is transformed correctly to a colon list, too
; COMMENTED OUT BECAUSE STRING-TOKENIZE IS MISSING (WILL BE FIXED)
; OK
(define (alist->env-test alist)
(let ((old-env (env->alist))) ; save old environment
(alist->env alist) ; set new environment
(let ( ; compare values of alist with values of the environment
(result (every
(lambda (var-pair)
(let ((var-pair-value (cdr var-pair))
(env-var-value (getenv (car var-pair))))
; (begin (display var-pair) (newline)
; (display var-pair-value) (newline)
; (display env-var-value) (newline)
; (display "---------------------") (newline))
(if (string-list? var-pair-value)
(equal? var-pair-value
(string-tokenize env-var-value #\:))
(equal? var-pair-value env-var-value))))
(alist-compress alist))))
(alist->env old-env) ; restore old environment
result)))
; NOTE: since alist-bla works only on alists, string-list / colon-list-conversion is not implemented
; OK 2001-04-09 16:21
(define (alist-delete-test key alist)
(not (member key (map car (alist-delete key alist)))))
; results #t, if the first occurance of the variable has the expected (new) value, else #f
; OK 2001-04-09 16:15
(define (alist-update-test key val alist)
(letrec ((check-update (lambda (alist)
(if (null? alist) ; if alist is empty key wasn't inserted
#f
(if (equal? key (caar alist)) ; key found
(if (equal? val (cdar alist)) ; value ok?
; key must not be in the cdr of alist
(not (member key (map car (cdr alist))))
#f)
(check-update (cdr alist)))))))
(check-update (alist-update key val alist))))
; checks compression of every variable
; OK 2001-04-09 15:46
(define (alist-compress-test alist)
(letrec ((check-compress (lambda (alist known-vars)
(if (null? alist)
#t
(if (member (caar alist) known-vars)
#f
(check-compress (cdr alist)
(cons (caar alist)
known-vars)))))))
(check-compress (alist-compress alist) '())))
; OK 2001-04-09 15:46
(define (with-env*-test env-alist-delta)
(with-env*-test-generator with-env*
env-alist-delta
(update-env (env->alist) env-alist-delta)))
; OK 2001-04-09 15:45
(define (with-total-env*-test env-alist)
(with-env*-test-generator with-total-env*
env-alist
env-alist))
; generator:
; There are three tests for each circumstance (s. scsh manual for details)
; * simple thunk: returns usually
; * non-local-return thunk: returns using escape-procedure
; * reinvoking-thunk: returns non-local, is reinvoked and returns
; each thunk return the result of the env-var-test, which is #t if the current
; environment is as expected
; the tunks are called via run-test that first runs the test and,
; if the test returned #t, returns #t if the current environment is as expected.
; (there are two test for the current-environment necessary since the environment
; during the call and after the call differ (s. manual for details))
; OK 2001-04-09 15:45
; the generator generates test-procedures for with-total-env* and with-env*
; parameters are:
; - call: either with-total-env* or with-env*
; - call-argument: either an env-alist (for with-total-env*) or an env-alist-delta (for with-env*)
; - expected-process-env: expected content of the environment during the with-env-call
(define (with-env*-test-generator call call-argument expected-process-env)
(let* ((old-env-alist (env->alist))
(env-var-test (lambda () ; checks, if the changed environment is as expected
(equal-to-current-env? expected-process-env)))
; store places for continuations:
(non-local-exit-cc #f) ; exit poit for a thunk
(reinvoking-cc #f) ; entry point to reinvoking thunk
(thunk-finished-cc #f) ; exit point for finished reinvoking thunk
; thunks for testing:
(thunk-local-return (lambda () (env-var-test)))
(cc-thunk-non-local-return
(lambda ()
(non-local-exit-cc (env-var-test)) ; non-local return
#f)) ; if non-local return fails (?), return #f
(cc-reinvoking-thunk
(lambda ()
(call-with-current-continuation
(lambda (k)
(set! reinvoking-cc k)
(non-local-exit-cc #f))) ; non-local-return
(thunk-finished-cc (env-var-test)) ; finish with result of env-var-test
#f)) ; if continuation-call fails (?), return #f
; procedure to perform tests (run test and check content of current environment)
(run-test
(lambda (thunk)
(and (thunk)
(equal-to-current-env? old-env-alist)))))
(and (run-test (lambda ()
(call call-argument thunk-local-return)))
(run-test (lambda ()
(call-with-current-continuation (lambda (k)
(set! non-local-exit-cc k) ; possibility of non-local return
(call call-argument
cc-thunk-non-local-return)))))
(run-test (lambda ()
(call-with-current-continuation
(lambda (finished)
(set! thunk-finished-cc finished)
(call-with-current-continuation
(lambda (k)
(set! non-local-exit-cc k) ; possibility of non-local return
(call call-argument cc-reinvoking-thunk)))
(reinvoking-cc #f)))))))) ; reinvoke thunk
; the old environment needn't to be restored because with-env* and with-total-env*
; don't change the current environment (if successful)
; checks if home-directory is a string
; OK 2001-04-09 15:45
(define (home-directory-test)
(string? home-directory))
; checks if exec-path-list is a string-list
; OK 2001-04-09 15:45
(define (exec-path-list-test)
(string-list? (thread-fluid exec-path-list)))
; OK 2001-04-09 15:45
(define (add-tester elt mark original-list add-result)
(letrec ((correct-insert
(lambda (add-result) ; checks if elt was inserted correctly
(if (null? add-result) ; empty list -> element wasn't inserted
#f
(cond
((equal? (car add-result) mark) #f) ; first occurance of mark without elt => #f
((equal? (car add-result) elt) ; found elt
(or (null? (cdr add-result)) ; either the list terminates or...
(equal? (cadr add-result) mark))) ; ...the following string is mark
(else ; otherwise the rest of the list has to be correct
(correct-insert (cdr add-result)))))))
(correct-order
(lambda (add-result original-list) ; checks, if order was respected
(cond
((null? add-result) ; if the result is empty,...
(null? original-list)) ; ...so the original list has to be empty, too
((null? original-list) ; if the original list is empty...
(or (null? add-result) ; ...either the result list has to be empty, ...
(and (equal? (car add-result) elt) ; or contains only the inserted element
(null? (cdr add-result)))))
((equal? (car add-result) (car original-list)) ; cars equal => continue with cdrs
(correct-order (cdr add-result) (cdr original-list)))
((equal? (car add-result) elt) ; => (car original-list) =/= elt !
(correct-order (cdr add-result) original-list)) ; found elt -> skip
(else ; lists are unequal
#f)))))
(and (correct-insert add-result)
(correct-order add-result original-list))))
; OK 2001-04-09 15:44
(define (add-before-test elt before liste)
(add-tester elt before liste (add-before elt before liste)))
; add-after operates as add-before on reverse list
; OK 2001-04-09 15:44
(define (add-after-test elt after liste)
(add-tester elt after liste (reverse (add-after elt after (reverse liste)))))
; helping procedures *************************************************************
; returns #t if liste is a list containing only strings, else #f
; OK
(define string-list?
(lambda (liste)
(and (list? liste)
(every (lambda (elt)
(string? elt))
liste))))
; deletes equal-to-this once in list, if present
; OK
(define (delete-once equal-to-this list)
(if (null? list)
'()
(if (equal? (car list) equal-to-this)
(cdr list)
(cons (car list) (delete-once equal-to-this (cdr list))))))
; compares to lists
; order is unimportant, but count of each element is
; examlpes:
; (list-equal? '(1 2) '(2 1)
; => #t
; (list-equal? '(1 2) '(2 1 1)
; #f
; OK
(define (list-equal? list1 list2)
(if (null? list1)
(null? list2)
(if (member (car list1) list2)
(list-equal? (cdr list1)
(delete-once (car list1) list2))
#f)))
; updates the environment env-alist via env-alist-delta
; NOTE: Test alist-update first (run alist-update-test key val alist)
; OK
(define update-env
(lambda (env-alist env-alist-delta)
(if (null? env-alist-delta)
env-alist
(update-env (alist-update (car (car env-alist-delta))
(cdr (car env-alist-delta))
env-alist)
(cdr env-alist-delta)))))
; compares old-env-alist with actual environment (env->alist)
; OK
(define equal-to-current-env?
(lambda (old-env-alist)
(list-equal? old-env-alist (env->alist))))
; tokenizes a string
; example:
; (string-tokenize "Tokenize this here" #\space) => ("Tokenize" "this" "here")
(define (string-tokenize string character)
(let ((char-list (string->list string)))
(let loop ((liste char-list)
(word '())
(result '()))
(if (null? liste)
(append result (list (list->string word)))
(if (equal? (car liste) character)
(loop (cdr liste) '() (append result (list (list->string word))))
(loop (cdr liste) (append word (list (car liste))) result))))))
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