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5d3e2388 | 1 | ;;;; environments.test -*- scheme -*- |
6e7d5622 | 2 | ;;;; Copyright (C) 2000, 2001, 2006 Free Software Foundation, Inc. |
5d3e2388 | 3 | ;;;; |
73be1d9e MV |
4 | ;;;; This library is free software; you can redistribute it and/or |
5 | ;;;; modify it under the terms of the GNU Lesser General Public | |
6 | ;;;; License as published by the Free Software Foundation; either | |
7 | ;;;; version 2.1 of the License, or (at your option) any later version. | |
8 | ;;;; | |
9 | ;;;; This library is distributed in the hope that it will be useful, | |
5d3e2388 | 10 | ;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of |
73be1d9e MV |
11 | ;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | ;;;; Lesser General Public License for more details. | |
13 | ;;;; | |
14 | ;;;; You should have received a copy of the GNU Lesser General Public | |
15 | ;;;; License along with this library; if not, write to the Free Software | |
92205699 | 16 | ;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
5d3e2388 DH |
17 | |
18 | (use-modules (ice-9 documentation)) | |
19 | ||
dd18d312 NJ |
20 | ;;; environments are currently commented out of libguile, so these |
21 | ;;; tests must be commented out also. - NJ 2006-11-02. | |
22 | (if #f (let () | |
5d3e2388 DH |
23 | |
24 | ;;; | |
25 | ;;; miscellaneous | |
26 | ;;; | |
27 | ||
6b4113af DH |
28 | (define exception:unbound-symbol |
29 | (cons 'misc-error "^Symbol .* not bound in environment")) | |
5d3e2388 DH |
30 | |
31 | (define (documented? object) | |
5c96bc39 | 32 | (not (not (object-documentation object)))) |
5d3e2388 | 33 | |
5d3e2388 DH |
34 | (define (folder sym val res) |
35 | (cons (cons sym val) res)) | |
36 | ||
034b924f DH |
37 | (define (make-observer-func) |
38 | (let* ((counter 0)) | |
39 | (lambda args | |
40 | (if (null? args) | |
41 | counter | |
42 | (set! counter (+ counter 1)))))) | |
43 | ||
44 | (define (make-erroneous-observer-func) | |
45 | (let* ((func (make-observer-func))) | |
46 | (lambda args | |
47 | (if (null? args) | |
48 | (func) | |
49 | (begin | |
50 | (func args) | |
51 | (error)))))) | |
5d3e2388 DH |
52 | |
53 | ;;; | |
54 | ;;; leaf-environments | |
55 | ;;; | |
56 | ||
57 | (with-test-prefix "leaf-environments" | |
58 | ||
59 | (with-test-prefix "leaf-environment?" | |
60 | ||
61 | (pass-if "documented?" | |
62 | (documented? leaf-environment?)) | |
63 | ||
64 | (pass-if "non-environment-object" | |
65 | (not (leaf-environment? #f)))) | |
66 | ||
67 | ||
68 | (with-test-prefix "make-leaf-environment" | |
69 | ||
70 | (pass-if "documented?" | |
71 | (documented? make-leaf-environment)) | |
72 | ||
73 | (pass-if "produces an environment" | |
74 | (environment? (make-leaf-environment))) | |
75 | ||
76 | (pass-if "produces a leaf-environment" | |
77 | (leaf-environment? (make-leaf-environment))) | |
78 | ||
79 | (pass-if "produces always a new environment" | |
80 | (not (eq? (make-leaf-environment) (make-leaf-environment))))) | |
81 | ||
82 | ||
83 | (with-test-prefix "bound, define, ref, set!, cell" | |
84 | ||
034b924f DH |
85 | (pass-if "symbols are unbound by default" |
86 | (let* ((env (make-leaf-environment))) | |
5d3e2388 DH |
87 | (and (not (environment-bound? env 'a)) |
88 | (not (environment-bound? env 'b)) | |
034b924f DH |
89 | (not (environment-bound? env 'c))))) |
90 | ||
91 | (pass-if "symbol is bound after define" | |
92 | (let* ((env (make-leaf-environment))) | |
93 | (environment-bound? env 'a) | |
94 | (environment-define env 'a #t) | |
95 | (environment-bound? env 'a))) | |
96 | ||
97 | (pass-if "ref a defined symbol" | |
98 | (let* ((env (make-leaf-environment))) | |
99 | (environment-bound? env 'a) | |
100 | (environment-bound? env 'b) | |
101 | (environment-define env 'a #t) | |
102 | (environment-define env 'b #f) | |
103 | (and (environment-ref env 'a) | |
104 | (not (environment-ref env 'b))))) | |
105 | ||
106 | (pass-if "set! a defined symbol" | |
107 | (let* ((env (make-leaf-environment))) | |
108 | (environment-define env 'a #t) | |
109 | (environment-define env 'b #f) | |
110 | (environment-ref env 'a) | |
111 | (environment-ref env 'b) | |
112 | (environment-set! env 'a #f) | |
113 | (environment-set! env 'b #t) | |
114 | (and (not (environment-ref env 'a)) | |
115 | (environment-ref env 'b)))) | |
116 | ||
117 | (pass-if "get a read-only cell" | |
118 | (let* ((env (make-leaf-environment))) | |
119 | (environment-define env 'a #t) | |
5d3e2388 | 120 | (let* ((cell (environment-cell env 'a #f))) |
034b924f DH |
121 | (and (cdr cell) |
122 | (begin | |
123 | (environment-set! env 'a #f) | |
124 | (not (cdr cell))))))) | |
5d3e2388 | 125 | |
034b924f DH |
126 | (pass-if "a read-only cell gets rebound after define" |
127 | (let* ((env (make-leaf-environment))) | |
128 | (environment-define env 'a #t) | |
5d3e2388 | 129 | (let* ((cell (environment-cell env 'a #f))) |
034b924f DH |
130 | (environment-define env 'a #f) |
131 | (not (eq? (environment-cell env 'a #f) cell))))) | |
5d3e2388 | 132 | |
034b924f DH |
133 | (pass-if "get a writable cell" |
134 | (let* ((env (make-leaf-environment))) | |
135 | (environment-define env 'a #t) | |
5d3e2388 DH |
136 | (let* ((readable (environment-cell env 'a #f)) |
137 | (writable (environment-cell env 'a #t))) | |
138 | (and (eq? readable writable) | |
139 | (begin | |
034b924f DH |
140 | (environment-set! env 'a #f) |
141 | (not (cdr writable))) | |
5d3e2388 | 142 | (begin |
034b924f DH |
143 | (set-cdr! writable #t) |
144 | (environment-ref env 'a)) | |
5d3e2388 | 145 | (begin |
034b924f DH |
146 | (set-cdr! (environment-cell env 'a #t) #f) |
147 | (not (cdr writable))))))) | |
5d3e2388 | 148 | |
034b924f DH |
149 | (pass-if "a writable cell gets rebound after define" |
150 | (let* ((env (make-leaf-environment))) | |
151 | (environment-define env 'a #t) | |
5d3e2388 | 152 | (let* ((cell (environment-cell env 'a #t))) |
034b924f DH |
153 | (environment-define env 'a #f) |
154 | (not (eq? (environment-cell env 'a #t) cell))))) | |
155 | ||
6b4113af DH |
156 | (pass-if-exception "reference an unbound symbol" |
157 | exception:unbound-symbol | |
158 | (environment-ref (make-leaf-environment) 'a)) | |
159 | ||
160 | (pass-if-exception "set! an unbound symbol" | |
161 | exception:unbound-symbol | |
162 | (environment-set! (make-leaf-environment) 'a #f)) | |
163 | ||
164 | (pass-if-exception "get a readable cell for an unbound symbol" | |
165 | exception:unbound-symbol | |
166 | (environment-cell (make-leaf-environment) 'a #f)) | |
167 | ||
168 | (pass-if-exception "get a writable cell for an unbound symbol" | |
169 | exception:unbound-symbol | |
170 | (environment-cell (make-leaf-environment) 'a #t))) | |
034b924f DH |
171 | |
172 | ||
173 | (with-test-prefix "undefine" | |
174 | ||
175 | (pass-if "undefine a defined symbol" | |
176 | (let* ((env (make-leaf-environment))) | |
177 | (environment-define env 'a 1) | |
178 | (environment-ref env 'a) | |
179 | (environment-undefine env 'a) | |
180 | (not (environment-bound? env 'a)))) | |
5d3e2388 | 181 | |
034b924f DH |
182 | (pass-if "undefine an already undefined symbol" |
183 | (environment-undefine (make-leaf-environment) 'a) | |
184 | #t)) | |
185 | ||
186 | ||
187 | (with-test-prefix "fold" | |
188 | ||
189 | (pass-if "empty environment" | |
190 | (let* ((env (make-leaf-environment))) | |
191 | (eq? 'success (environment-fold env folder 'success)))) | |
192 | ||
193 | (pass-if "one symbol" | |
194 | (let* ((env (make-leaf-environment))) | |
195 | (environment-define env 'a #t) | |
196 | (equal? '((a . #t)) (environment-fold env folder '())))) | |
197 | ||
198 | (pass-if "two symbols" | |
199 | (let* ((env (make-leaf-environment))) | |
200 | (environment-define env 'a #t) | |
201 | (environment-define env 'b #f) | |
202 | (let ((folded (environment-fold env folder '()))) | |
203 | (or (equal? folded '((a . #t) (b . #f))) | |
204 | (equal? folded '((b . #f) (a . #t)))))))) | |
205 | ||
206 | ||
207 | (with-test-prefix "observe" | |
208 | ||
209 | (pass-if "observe an environment" | |
210 | (let* ((env (make-leaf-environment))) | |
211 | (environment-observe env (make-observer-func)) | |
212 | #t)) | |
213 | ||
214 | (pass-if "observe an environment twice" | |
215 | (let* ((env (make-leaf-environment)) | |
216 | (observer-1 (environment-observe env (make-observer-func))) | |
217 | (observer-2 (environment-observe env (make-observer-func)))) | |
218 | (not (eq? observer-1 observer-2)))) | |
219 | ||
220 | (pass-if "definition of an undefined symbol" | |
221 | (let* ((env (make-leaf-environment)) | |
222 | (func (make-observer-func))) | |
223 | (environment-observe env func) | |
224 | (environment-define env 'a 1) | |
225 | (eqv? (func) 1))) | |
226 | ||
227 | (pass-if "definition of an already defined symbol" | |
228 | (let* ((env (make-leaf-environment))) | |
229 | (environment-define env 'a 1) | |
230 | (let* ((func (make-observer-func))) | |
231 | (environment-observe env func) | |
232 | (environment-define env 'a 1) | |
233 | (eqv? (func) 1)))) | |
234 | ||
235 | (pass-if "set!ing of a defined symbol" | |
236 | (let* ((env (make-leaf-environment))) | |
237 | (environment-define env 'a 1) | |
238 | (let* ((func (make-observer-func))) | |
239 | (environment-observe env func) | |
240 | (environment-set! env 'a 1) | |
241 | (eqv? (func) 0)))) | |
242 | ||
243 | (pass-if "undefining a defined symbol" | |
244 | (let* ((env (make-leaf-environment))) | |
245 | (environment-define env 'a 1) | |
246 | (let* ((func (make-observer-func))) | |
247 | (environment-observe env func) | |
248 | (environment-undefine env 'a) | |
249 | (eqv? (func) 1)))) | |
250 | ||
251 | (pass-if "undefining an already undefined symbol" | |
252 | (let* ((env (make-leaf-environment)) | |
253 | (func (make-observer-func))) | |
254 | (environment-observe env func) | |
255 | (environment-undefine env 'a) | |
256 | (eqv? (func) 0))) | |
257 | ||
258 | (pass-if "unobserve an active observer" | |
259 | (let* ((env (make-leaf-environment)) | |
260 | (func (make-observer-func)) | |
261 | (observer (environment-observe env func))) | |
262 | (environment-unobserve observer) | |
263 | (environment-define env 'a 1) | |
264 | (eqv? (func) 0))) | |
265 | ||
266 | (pass-if "unobserve an inactive observer" | |
267 | (let* ((env (make-leaf-environment)) | |
268 | (func (make-observer-func)) | |
269 | (observer (environment-observe env func))) | |
270 | (environment-unobserve observer) | |
271 | (environment-unobserve observer) | |
272 | #t))) | |
273 | ||
274 | ||
275 | (with-test-prefix "observe-weak" | |
276 | ||
277 | (pass-if "observe an environment" | |
278 | (let* ((env (make-leaf-environment))) | |
279 | (environment-observe-weak env (make-observer-func)) | |
280 | #t)) | |
281 | ||
282 | (pass-if "observe an environment twice" | |
283 | (let* ((env (make-leaf-environment)) | |
284 | (observer-1 (environment-observe-weak env (make-observer-func))) | |
285 | (observer-2 (environment-observe-weak env (make-observer-func)))) | |
286 | (not (eq? observer-1 observer-2)))) | |
287 | ||
288 | (pass-if "definition of an undefined symbol" | |
289 | (let* ((env (make-leaf-environment)) | |
290 | (func (make-observer-func))) | |
291 | (environment-observe-weak env func) | |
292 | (environment-define env 'a 1) | |
293 | (eqv? (func) 1))) | |
294 | ||
295 | (pass-if "definition of an already defined symbol" | |
296 | (let* ((env (make-leaf-environment))) | |
297 | (environment-define env 'a 1) | |
298 | (let* ((func (make-observer-func))) | |
299 | (environment-observe-weak env func) | |
300 | (environment-define env 'a 1) | |
301 | (eqv? (func) 1)))) | |
302 | ||
303 | (pass-if "set!ing of a defined symbol" | |
304 | (let* ((env (make-leaf-environment))) | |
305 | (environment-define env 'a 1) | |
306 | (let* ((func (make-observer-func))) | |
307 | (environment-observe-weak env func) | |
308 | (environment-set! env 'a 1) | |
309 | (eqv? (func) 0)))) | |
310 | ||
311 | (pass-if "undefining a defined symbol" | |
312 | (let* ((env (make-leaf-environment))) | |
313 | (environment-define env 'a 1) | |
314 | (let* ((func (make-observer-func))) | |
315 | (environment-observe-weak env func) | |
316 | (environment-undefine env 'a) | |
317 | (eqv? (func) 1)))) | |
318 | ||
319 | (pass-if "undefining an already undefined symbol" | |
320 | (let* ((env (make-leaf-environment)) | |
321 | (func (make-observer-func))) | |
322 | (environment-observe-weak env func) | |
323 | (environment-undefine env 'a) | |
324 | (eqv? (func) 0))) | |
325 | ||
326 | (pass-if "unobserve an active observer" | |
327 | (let* ((env (make-leaf-environment)) | |
328 | (func (make-observer-func)) | |
329 | (observer (environment-observe-weak env func))) | |
330 | (environment-unobserve observer) | |
331 | (environment-define env 'a 1) | |
332 | (eqv? (func) 0))) | |
333 | ||
334 | (pass-if "unobserve an inactive observer" | |
335 | (let* ((env (make-leaf-environment)) | |
336 | (func (make-observer-func)) | |
337 | (observer (environment-observe-weak env func))) | |
338 | (environment-unobserve observer) | |
339 | (environment-unobserve observer) | |
340 | #t)) | |
341 | ||
342 | (pass-if "weak observer gets collected" | |
343 | (gc) | |
344 | (let* ((env (make-leaf-environment)) | |
345 | (func (make-observer-func))) | |
346 | (environment-observe-weak env func) | |
347 | (gc) | |
348 | (environment-define env 'a 1) | |
41505259 DH |
349 | (if (not (eqv? (func) 0)) |
350 | (throw 'unresolved) ; note: conservative scanning | |
351 | #t)))) | |
034b924f DH |
352 | |
353 | ||
354 | (with-test-prefix "erroneous observers" | |
355 | ||
356 | (pass-if "update continues after error" | |
357 | (let* ((env (make-leaf-environment)) | |
358 | (func-1 (make-erroneous-observer-func)) | |
359 | (func-2 (make-erroneous-observer-func))) | |
360 | (environment-observe env func-1) | |
361 | (environment-observe env func-2) | |
362 | (catch #t | |
363 | (lambda () | |
364 | (environment-define env 'a 1) | |
365 | #f) | |
366 | (lambda args | |
367 | (and (eq? (func-1) 1) | |
368 | (eq? (func-2) 1)))))))) | |
369 | ||
370 | ||
371 | ;;; | |
372 | ;;; leaf-environment based eval-environments | |
373 | ;;; | |
374 | ||
375 | (with-test-prefix "leaf-environment based eval-environments" | |
376 | ||
377 | (with-test-prefix "eval-environment?" | |
378 | ||
379 | (pass-if "documented?" | |
380 | (documented? eval-environment?)) | |
381 | ||
382 | (pass-if "non-environment-object" | |
383 | (not (eval-environment? #f))) | |
384 | ||
385 | (pass-if "leaf-environment-object" | |
386 | (not (eval-environment? (make-leaf-environment))))) | |
387 | ||
388 | ||
389 | (with-test-prefix "make-eval-environment" | |
390 | ||
391 | (pass-if "documented?" | |
392 | (documented? make-eval-environment)) | |
393 | ||
394 | (let* ((local (make-leaf-environment)) | |
395 | (imported (make-leaf-environment))) | |
396 | ||
397 | (pass-if "produces an environment" | |
398 | (environment? (make-eval-environment local imported))) | |
399 | ||
400 | (pass-if "produces an eval-environment" | |
401 | (eval-environment? (make-eval-environment local imported))) | |
402 | ||
403 | (pass-if "produces always a new environment" | |
404 | (not (eq? (make-eval-environment local imported) | |
405 | (make-eval-environment local imported)))))) | |
406 | ||
407 | ||
408 | (with-test-prefix "eval-environment-local" | |
409 | ||
410 | (pass-if "documented?" | |
411 | (documented? eval-environment-local)) | |
412 | ||
413 | (pass-if "returns local" | |
414 | (let* ((local (make-leaf-environment)) | |
415 | (imported (make-leaf-environment)) | |
416 | (env (make-eval-environment local imported))) | |
417 | (eq? (eval-environment-local env) local)))) | |
418 | ||
419 | ||
420 | (with-test-prefix "eval-environment-imported" | |
421 | ||
422 | (pass-if "documented?" | |
423 | (documented? eval-environment-imported)) | |
424 | ||
425 | (pass-if "returns imported" | |
426 | (let* ((local (make-leaf-environment)) | |
427 | (imported (make-leaf-environment)) | |
428 | (env (make-eval-environment local imported))) | |
429 | (eq? (eval-environment-imported env) imported)))) | |
430 | ||
431 | ||
432 | (with-test-prefix "bound, define, ref, set!, cell" | |
433 | ||
434 | (pass-if "symbols are unbound by default" | |
435 | (let* ((local (make-leaf-environment)) | |
436 | (imported (make-leaf-environment)) | |
437 | (env (make-eval-environment local imported))) | |
438 | (and (not (environment-bound? env 'a)) | |
439 | (not (environment-bound? env 'b)) | |
440 | (not (environment-bound? env 'c))))) | |
441 | ||
442 | (with-test-prefix "symbols bound in imported" | |
443 | ||
444 | (pass-if "binding is visible" | |
445 | (let* ((local (make-leaf-environment)) | |
446 | (imported (make-leaf-environment)) | |
447 | (env (make-eval-environment local imported))) | |
448 | (environment-bound? env 'a) | |
449 | (environment-define imported 'a #t) | |
450 | (environment-bound? env 'a))) | |
451 | ||
452 | (pass-if "ref works" | |
453 | (let* ((local (make-leaf-environment)) | |
454 | (imported (make-leaf-environment)) | |
455 | (env (make-eval-environment local imported))) | |
456 | (environment-bound? env 'a) | |
457 | (environment-define imported 'a #t) | |
458 | (environment-ref env 'a))) | |
459 | ||
460 | (pass-if "set! works" | |
461 | (let* ((local (make-leaf-environment)) | |
462 | (imported (make-leaf-environment)) | |
463 | (env (make-eval-environment local imported))) | |
464 | (environment-define imported 'a #f) | |
465 | (environment-set! env 'a #t) | |
466 | (environment-ref imported 'a))) | |
467 | ||
468 | (pass-if "cells are passed through" | |
469 | (let* ((local (make-leaf-environment)) | |
470 | (imported (make-leaf-environment)) | |
471 | (env (make-eval-environment local imported))) | |
472 | (environment-define imported 'a #t) | |
473 | (let* ((imported-cell (environment-cell imported 'a #f)) | |
474 | (env-cell (environment-cell env 'a #f))) | |
475 | (eq? env-cell imported-cell))))) | |
476 | ||
477 | (with-test-prefix "symbols bound in local" | |
478 | ||
479 | (pass-if "binding is visible" | |
480 | (let* ((local (make-leaf-environment)) | |
481 | (imported (make-leaf-environment)) | |
482 | (env (make-eval-environment local imported))) | |
483 | (environment-bound? env 'a) | |
484 | (environment-define local 'a #t) | |
485 | (environment-bound? env 'a))) | |
486 | ||
487 | (pass-if "ref works" | |
488 | (let* ((local (make-leaf-environment)) | |
489 | (imported (make-leaf-environment)) | |
490 | (env (make-eval-environment local imported))) | |
491 | (environment-define local 'a #t) | |
492 | (environment-ref env 'a))) | |
493 | ||
494 | (pass-if "set! works" | |
495 | (let* ((local (make-leaf-environment)) | |
496 | (imported (make-leaf-environment)) | |
497 | (env (make-eval-environment local imported))) | |
498 | (environment-define local 'a #f) | |
499 | (environment-set! env 'a #t) | |
500 | (environment-ref local 'a))) | |
501 | ||
502 | (pass-if "cells are passed through" | |
503 | (let* ((local (make-leaf-environment)) | |
504 | (imported (make-leaf-environment)) | |
505 | (env (make-eval-environment local imported))) | |
506 | (environment-define local 'a #t) | |
507 | (let* ((local-cell (environment-cell local 'a #f)) | |
508 | (env-cell (environment-cell env 'a #f))) | |
509 | (eq? env-cell local-cell))))) | |
510 | ||
511 | (with-test-prefix "symbols bound in local and imported" | |
512 | ||
513 | (pass-if "binding is visible" | |
514 | (let* ((local (make-leaf-environment)) | |
515 | (imported (make-leaf-environment)) | |
516 | (env (make-eval-environment local imported))) | |
517 | (environment-bound? env 'a) | |
518 | (environment-define imported 'a #t) | |
519 | (environment-define local 'a #f) | |
520 | (environment-bound? env 'a))) | |
521 | ||
522 | (pass-if "ref works" | |
523 | (let* ((local (make-leaf-environment)) | |
524 | (imported (make-leaf-environment)) | |
525 | (env (make-eval-environment local imported))) | |
526 | (environment-define imported 'a #f) | |
527 | (environment-define local 'a #t) | |
528 | (environment-ref env 'a))) | |
529 | ||
530 | (pass-if "set! changes local" | |
531 | (let* ((local (make-leaf-environment)) | |
532 | (imported (make-leaf-environment)) | |
533 | (env (make-eval-environment local imported))) | |
534 | (environment-define imported 'a #f) | |
535 | (environment-define local 'a #f) | |
536 | (environment-set! env 'a #t) | |
537 | (environment-ref local 'a))) | |
538 | ||
539 | (pass-if "set! does not touch imported" | |
540 | (let* ((local (make-leaf-environment)) | |
541 | (imported (make-leaf-environment)) | |
542 | (env (make-eval-environment local imported))) | |
543 | (environment-define imported 'a #t) | |
544 | (environment-define local 'a #t) | |
545 | (environment-set! env 'a #f) | |
546 | (environment-ref imported 'a))) | |
547 | ||
548 | (pass-if "cells from local are passed through" | |
549 | (let* ((local (make-leaf-environment)) | |
550 | (imported (make-leaf-environment)) | |
551 | (env (make-eval-environment local imported))) | |
552 | (environment-define local 'a #t) | |
553 | (let* ((local-cell (environment-cell local 'a #f)) | |
554 | (env-cell (environment-cell env 'a #f))) | |
555 | (eq? env-cell local-cell))))) | |
556 | ||
557 | (with-test-prefix "defining symbols" | |
558 | ||
559 | (pass-if "symbols are bound in local after define" | |
560 | (let* ((local (make-leaf-environment)) | |
561 | (imported (make-leaf-environment)) | |
562 | (env (make-eval-environment local imported))) | |
563 | (environment-define env 'a #t) | |
564 | (environment-bound? local 'a))) | |
565 | ||
566 | (pass-if "cells in local get rebound after define" | |
567 | (let* ((local (make-leaf-environment)) | |
568 | (imported (make-leaf-environment)) | |
569 | (env (make-eval-environment local imported))) | |
570 | (environment-define env 'a #f) | |
571 | (let* ((old-cell (environment-cell local 'a #f))) | |
572 | (environment-define env 'a #f) | |
573 | (let* ((new-cell (environment-cell local 'a #f))) | |
574 | (not (eq? new-cell old-cell)))))) | |
575 | ||
576 | (pass-if "cells in imported get shadowed after define" | |
577 | (let* ((local (make-leaf-environment)) | |
578 | (imported (make-leaf-environment)) | |
579 | (env (make-eval-environment local imported))) | |
580 | (environment-define imported 'a #f) | |
581 | (environment-define env 'a #t) | |
582 | (environment-ref local 'a)))) | |
583 | ||
584 | (let* ((local (make-leaf-environment)) | |
585 | (imported (make-leaf-environment)) | |
586 | (env (make-eval-environment local imported))) | |
587 | ||
6b4113af DH |
588 | (pass-if-exception "reference an unbound symbol" |
589 | exception:unbound-symbol | |
590 | (environment-ref env 'b)) | |
5d3e2388 | 591 | |
6b4113af DH |
592 | (pass-if-exception "set! an unbound symbol" |
593 | exception:unbound-symbol | |
594 | (environment-set! env 'b #f)) | |
5d3e2388 | 595 | |
6b4113af DH |
596 | (pass-if-exception "get a readable cell for an unbound symbol" |
597 | exception:unbound-symbol | |
598 | (environment-cell env 'b #f)) | |
5d3e2388 | 599 | |
6b4113af DH |
600 | (pass-if-exception "get a writable cell for an unbound symbol" |
601 | exception:unbound-symbol | |
602 | (environment-cell env 'b #t)))) | |
5d3e2388 | 603 | |
034b924f | 604 | (with-test-prefix "eval-environment-set-local!" |
5d3e2388 | 605 | |
034b924f DH |
606 | (pass-if "documented?" |
607 | (documented? eval-environment-set-local!)) | |
608 | ||
609 | (pass-if "new binding becomes visible" | |
610 | (let* ((old-local (make-leaf-environment)) | |
611 | (new-local (make-leaf-environment)) | |
612 | (imported (make-leaf-environment)) | |
613 | (env (make-eval-environment old-local imported))) | |
614 | (environment-bound? env 'a) | |
615 | (environment-define new-local 'a #t) | |
616 | (eval-environment-set-local! env new-local) | |
617 | (environment-bound? env 'a))) | |
618 | ||
619 | (pass-if "existing binding is replaced" | |
620 | (let* ((old-local (make-leaf-environment)) | |
621 | (new-local (make-leaf-environment)) | |
622 | (imported (make-leaf-environment)) | |
623 | (env (make-eval-environment old-local imported))) | |
624 | (environment-define old-local 'a #f) | |
625 | (environment-ref env 'a) | |
626 | (environment-define new-local 'a #t) | |
627 | (eval-environment-set-local! env new-local) | |
628 | (environment-ref env 'a))) | |
629 | ||
630 | (pass-if "undefined binding is removed" | |
631 | (let* ((old-local (make-leaf-environment)) | |
632 | (new-local (make-leaf-environment)) | |
633 | (imported (make-leaf-environment)) | |
634 | (env (make-eval-environment old-local imported))) | |
635 | (environment-define old-local 'a #f) | |
636 | (environment-ref env 'a) | |
637 | (eval-environment-set-local! env new-local) | |
638 | (not (environment-bound? env 'a)))) | |
639 | ||
640 | (pass-if "binding in imported remains shadowed" | |
641 | (let* ((old-local (make-leaf-environment)) | |
642 | (new-local (make-leaf-environment)) | |
643 | (imported (make-leaf-environment)) | |
644 | (env (make-eval-environment old-local imported))) | |
645 | (environment-define imported 'a #f) | |
646 | (environment-define old-local 'a #f) | |
647 | (environment-ref env 'a) | |
648 | (environment-define new-local 'a #t) | |
649 | (eval-environment-set-local! env new-local) | |
650 | (environment-ref env 'a))) | |
651 | ||
652 | (pass-if "binding in imported gets shadowed" | |
653 | (let* ((old-local (make-leaf-environment)) | |
654 | (new-local (make-leaf-environment)) | |
655 | (imported (make-leaf-environment)) | |
656 | (env (make-eval-environment old-local imported))) | |
657 | (environment-define imported 'a #f) | |
658 | (environment-ref env 'a) | |
659 | (environment-define new-local 'a #t) | |
660 | (eval-environment-set-local! env new-local) | |
661 | (environment-ref env 'a))) | |
662 | ||
663 | (pass-if "binding in imported becomes visible" | |
664 | (let* ((old-local (make-leaf-environment)) | |
665 | (new-local (make-leaf-environment)) | |
666 | (imported (make-leaf-environment)) | |
667 | (env (make-eval-environment old-local imported))) | |
668 | (environment-define imported 'a #t) | |
669 | (environment-define old-local 'a #f) | |
670 | (environment-ref env 'a) | |
671 | (eval-environment-set-local! env new-local) | |
672 | (environment-ref env 'a)))) | |
673 | ||
674 | (with-test-prefix "eval-environment-set-imported!" | |
5d3e2388 | 675 | |
034b924f DH |
676 | (pass-if "documented?" |
677 | (documented? eval-environment-set-imported!)) | |
678 | ||
679 | (pass-if "new binding becomes visible" | |
680 | (let* ((local (make-leaf-environment)) | |
681 | (old-imported (make-leaf-environment)) | |
682 | (new-imported (make-leaf-environment)) | |
683 | (env (make-eval-environment local old-imported))) | |
684 | (environment-bound? env 'a) | |
685 | (environment-define new-imported 'a #t) | |
686 | (eval-environment-set-imported! env new-imported) | |
687 | (environment-bound? env 'a))) | |
688 | ||
689 | (pass-if "existing binding is replaced" | |
690 | (let* ((local (make-leaf-environment)) | |
691 | (old-imported (make-leaf-environment)) | |
692 | (new-imported (make-leaf-environment)) | |
693 | (env (make-eval-environment local old-imported))) | |
694 | (environment-define old-imported 'a #f) | |
695 | (environment-ref env 'a) | |
696 | (environment-define new-imported 'a #t) | |
697 | (eval-environment-set-imported! env new-imported) | |
698 | (environment-ref env 'a))) | |
699 | ||
700 | (pass-if "undefined binding is removed" | |
701 | (let* ((local (make-leaf-environment)) | |
702 | (old-imported (make-leaf-environment)) | |
703 | (new-imported (make-leaf-environment)) | |
704 | (env (make-eval-environment local old-imported))) | |
705 | (environment-define old-imported 'a #f) | |
706 | (environment-ref env 'a) | |
707 | (eval-environment-set-imported! env new-imported) | |
708 | (not (environment-bound? env 'a)))) | |
709 | ||
710 | (pass-if "binding in imported remains shadowed" | |
711 | (let* ((local (make-leaf-environment)) | |
712 | (old-imported (make-leaf-environment)) | |
713 | (new-imported (make-leaf-environment)) | |
714 | (env (make-eval-environment local old-imported))) | |
715 | (environment-define local 'a #t) | |
716 | (environment-define old-imported 'a #f) | |
717 | (environment-ref env 'a) | |
718 | (environment-define new-imported 'a #t) | |
719 | (eval-environment-set-imported! env new-imported) | |
720 | (environment-ref env 'a))) | |
721 | ||
722 | (pass-if "binding in imported gets shadowed" | |
723 | (let* ((local (make-leaf-environment)) | |
724 | (old-imported (make-leaf-environment)) | |
725 | (new-imported (make-leaf-environment)) | |
726 | (env (make-eval-environment local old-imported))) | |
727 | (environment-define local 'a #t) | |
728 | (environment-ref env 'a) | |
729 | (environment-define new-imported 'a #f) | |
730 | (eval-environment-set-imported! env new-imported) | |
731 | (environment-ref env 'a)))) | |
5d3e2388 | 732 | |
034b924f | 733 | (with-test-prefix "undefine" |
5d3e2388 | 734 | |
034b924f DH |
735 | (pass-if "undefine an already undefined symbol" |
736 | (let* ((local (make-leaf-environment)) | |
737 | (imported (make-leaf-environment)) | |
738 | (env (make-eval-environment local imported))) | |
739 | (environment-undefine env 'a) | |
740 | #t)) | |
5d3e2388 | 741 | |
034b924f DH |
742 | (pass-if "undefine removes a binding from local" |
743 | (let* ((local (make-leaf-environment)) | |
744 | (imported (make-leaf-environment)) | |
745 | (env (make-eval-environment local imported))) | |
746 | (environment-define local 'a #t) | |
747 | (environment-undefine env 'a) | |
748 | (not (environment-bound? local 'a)))) | |
5d3e2388 | 749 | |
034b924f DH |
750 | (pass-if "undefine does not influence imported" |
751 | (let* ((local (make-leaf-environment)) | |
752 | (imported (make-leaf-environment)) | |
753 | (env (make-eval-environment local imported))) | |
754 | (environment-define imported 'a #t) | |
755 | (environment-undefine env 'a) | |
756 | (environment-bound? imported 'a))) | |
5d3e2388 | 757 | |
034b924f DH |
758 | (pass-if "undefine an imported symbol does not undefine it" |
759 | (let* ((local (make-leaf-environment)) | |
760 | (imported (make-leaf-environment)) | |
761 | (env (make-eval-environment local imported))) | |
762 | (environment-define imported 'a #t) | |
5d3e2388 | 763 | (environment-undefine env 'a) |
034b924f DH |
764 | (environment-bound? env 'a))) |
765 | ||
766 | (pass-if "undefine unshadows an imported symbol" | |
767 | (let* ((local (make-leaf-environment)) | |
768 | (imported (make-leaf-environment)) | |
769 | (env (make-eval-environment local imported))) | |
770 | (environment-define imported 'a #t) | |
771 | (environment-define local 'a #f) | |
772 | (environment-undefine env 'a) | |
773 | (environment-ref env 'a)))) | |
5d3e2388 | 774 | |
034b924f | 775 | (with-test-prefix "fold" |
5d3e2388 | 776 | |
034b924f DH |
777 | (pass-if "empty environment" |
778 | (let* ((local (make-leaf-environment)) | |
779 | (imported (make-leaf-environment)) | |
780 | (env (make-eval-environment local imported))) | |
781 | (eq? 'success (environment-fold env folder 'success)))) | |
782 | ||
783 | (pass-if "one symbol in local" | |
784 | (let* ((local (make-leaf-environment)) | |
785 | (imported (make-leaf-environment)) | |
786 | (env (make-eval-environment local imported))) | |
787 | (environment-define local 'a #t) | |
788 | (equal? '((a . #t)) (environment-fold env folder '())))) | |
789 | ||
790 | (pass-if "one symbol in imported" | |
791 | (let* ((local (make-leaf-environment)) | |
792 | (imported (make-leaf-environment)) | |
793 | (env (make-eval-environment local imported))) | |
794 | (environment-define imported 'a #t) | |
795 | (equal? '((a . #t)) (environment-fold env folder '())))) | |
796 | ||
797 | (pass-if "shadowed symbol" | |
798 | (let* ((local (make-leaf-environment)) | |
799 | (imported (make-leaf-environment)) | |
800 | (env (make-eval-environment local imported))) | |
801 | (environment-define local 'a #t) | |
802 | (environment-define imported 'a #f) | |
803 | (equal? '((a . #t)) (environment-fold env folder '())))) | |
804 | ||
805 | (pass-if "one symbol each" | |
806 | (let* ((local (make-leaf-environment)) | |
807 | (imported (make-leaf-environment)) | |
808 | (env (make-eval-environment local imported))) | |
809 | (environment-define local 'a #t) | |
810 | (environment-define imported 'b #f) | |
811 | (let ((folded (environment-fold env folder '()))) | |
812 | (or (equal? folded '((a . #t) (b . #f))) | |
813 | (equal? folded '((b . #f) (a . #t)))))))) | |
5d3e2388 DH |
814 | |
815 | ||
816 | (with-test-prefix "observe" | |
817 | ||
034b924f DH |
818 | (pass-if "observe an environment" |
819 | (let* ((local (make-leaf-environment)) | |
820 | (imported (make-leaf-environment)) | |
821 | (env (make-eval-environment local imported))) | |
822 | (environment-observe env (make-observer-func)) | |
823 | #t)) | |
824 | ||
825 | (pass-if "observe an environment twice" | |
826 | (let* ((local (make-leaf-environment)) | |
827 | (imported (make-leaf-environment)) | |
828 | (env (make-eval-environment local imported)) | |
829 | (observer-1 (environment-observe env (make-observer-func))) | |
830 | (observer-2 (environment-observe env (make-observer-func)))) | |
831 | (not (eq? observer-1 observer-2)))) | |
832 | ||
833 | (pass-if "definition of an undefined symbol" | |
834 | (let* ((local (make-leaf-environment)) | |
835 | (imported (make-leaf-environment)) | |
836 | (env (make-eval-environment local imported)) | |
837 | (func (make-observer-func))) | |
838 | (environment-observe env func) | |
5d3e2388 | 839 | (environment-define env 'a 1) |
034b924f | 840 | (eqv? (func) 1))) |
5d3e2388 | 841 | |
034b924f DH |
842 | (pass-if "definition of an already defined symbol" |
843 | (let* ((local (make-leaf-environment)) | |
844 | (imported (make-leaf-environment)) | |
845 | (env (make-eval-environment local imported))) | |
5d3e2388 | 846 | (environment-define env 'a 1) |
034b924f DH |
847 | (let* ((func (make-observer-func))) |
848 | (environment-observe env func) | |
849 | (environment-define env 'a 1) | |
850 | (eqv? (func) 1)))) | |
851 | ||
852 | (pass-if "set!ing of a defined symbol" | |
853 | (let* ((local (make-leaf-environment)) | |
854 | (imported (make-leaf-environment)) | |
855 | (env (make-eval-environment local imported))) | |
856 | (environment-define env 'a 1) | |
857 | (let* ((func (make-observer-func))) | |
858 | (environment-observe env func) | |
859 | (environment-set! env 'a 1) | |
860 | (eqv? (func) 0)))) | |
861 | ||
862 | (pass-if "undefining a defined symbol" | |
863 | (let* ((local (make-leaf-environment)) | |
864 | (imported (make-leaf-environment)) | |
865 | (env (make-eval-environment local imported))) | |
866 | (environment-define env 'a 1) | |
867 | (let* ((func (make-observer-func))) | |
868 | (environment-observe env func) | |
869 | (environment-undefine env 'a) | |
870 | (eqv? (func) 1)))) | |
871 | ||
872 | (pass-if "undefining an already undefined symbol" | |
873 | (let* ((local (make-leaf-environment)) | |
874 | (imported (make-leaf-environment)) | |
875 | (env (make-eval-environment local imported)) | |
876 | (func (make-observer-func))) | |
877 | (environment-observe env func) | |
5d3e2388 | 878 | (environment-undefine env 'a) |
034b924f DH |
879 | (eqv? (func) 0))) |
880 | ||
881 | (pass-if "unobserve an active observer" | |
882 | (let* ((local (make-leaf-environment)) | |
883 | (imported (make-leaf-environment)) | |
884 | (env (make-eval-environment local imported)) | |
885 | (func (make-observer-func)) | |
886 | (observer (environment-observe env func))) | |
5d3e2388 DH |
887 | (environment-unobserve observer) |
888 | (environment-define env 'a 1) | |
034b924f DH |
889 | (eqv? (func) 0))) |
890 | ||
891 | (pass-if "unobserve an inactive observer" | |
892 | (let* ((local (make-leaf-environment)) | |
893 | (imported (make-leaf-environment)) | |
894 | (env (make-eval-environment local imported)) | |
895 | (func (make-observer-func)) | |
896 | (observer (environment-observe env func))) | |
897 | (environment-unobserve observer) | |
5d3e2388 DH |
898 | (environment-unobserve observer) |
899 | #t))) | |
900 | ||
901 | ||
902 | (with-test-prefix "observe-weak" | |
903 | ||
034b924f DH |
904 | (pass-if "observe an environment" |
905 | (let* ((local (make-leaf-environment)) | |
906 | (imported (make-leaf-environment)) | |
907 | (env (make-eval-environment local imported))) | |
908 | (environment-observe-weak env (make-observer-func)) | |
909 | #t)) | |
910 | ||
911 | (pass-if "observe an environment twice" | |
912 | (let* ((local (make-leaf-environment)) | |
913 | (imported (make-leaf-environment)) | |
914 | (env (make-eval-environment local imported)) | |
915 | (observer-1 (environment-observe-weak env (make-observer-func))) | |
916 | (observer-2 (environment-observe-weak env (make-observer-func)))) | |
917 | (not (eq? observer-1 observer-2)))) | |
918 | ||
919 | (pass-if "definition of an undefined symbol" | |
920 | (let* ((local (make-leaf-environment)) | |
921 | (imported (make-leaf-environment)) | |
922 | (env (make-eval-environment local imported)) | |
923 | (func (make-observer-func))) | |
924 | (environment-observe-weak env func) | |
5d3e2388 | 925 | (environment-define env 'a 1) |
034b924f | 926 | (eqv? (func) 1))) |
5d3e2388 | 927 | |
034b924f DH |
928 | (pass-if "definition of an already defined symbol" |
929 | (let* ((local (make-leaf-environment)) | |
930 | (imported (make-leaf-environment)) | |
931 | (env (make-eval-environment local imported))) | |
5d3e2388 | 932 | (environment-define env 'a 1) |
034b924f DH |
933 | (let* ((func (make-observer-func))) |
934 | (environment-observe-weak env func) | |
935 | (environment-define env 'a 1) | |
936 | (eqv? (func) 1)))) | |
937 | ||
938 | (pass-if "set!ing of a defined symbol" | |
939 | (let* ((local (make-leaf-environment)) | |
940 | (imported (make-leaf-environment)) | |
941 | (env (make-eval-environment local imported))) | |
942 | (environment-define env 'a 1) | |
943 | (let* ((func (make-observer-func))) | |
944 | (environment-observe-weak env func) | |
945 | (environment-set! env 'a 1) | |
946 | (eqv? (func) 0)))) | |
947 | ||
948 | (pass-if "undefining a defined symbol" | |
949 | (let* ((local (make-leaf-environment)) | |
950 | (imported (make-leaf-environment)) | |
951 | (env (make-eval-environment local imported))) | |
952 | (environment-define env 'a 1) | |
953 | (let* ((func (make-observer-func))) | |
954 | (environment-observe-weak env func) | |
955 | (environment-undefine env 'a) | |
956 | (eqv? (func) 1)))) | |
957 | ||
958 | (pass-if "undefining an already undefined symbol" | |
959 | (let* ((local (make-leaf-environment)) | |
960 | (imported (make-leaf-environment)) | |
961 | (env (make-eval-environment local imported)) | |
962 | (func (make-observer-func))) | |
963 | (environment-observe-weak env func) | |
5d3e2388 | 964 | (environment-undefine env 'a) |
034b924f DH |
965 | (eqv? (func) 0))) |
966 | ||
967 | (pass-if "unobserve an active observer" | |
968 | (let* ((local (make-leaf-environment)) | |
969 | (imported (make-leaf-environment)) | |
970 | (env (make-eval-environment local imported)) | |
971 | (func (make-observer-func)) | |
972 | (observer (environment-observe-weak env func))) | |
5d3e2388 DH |
973 | (environment-unobserve observer) |
974 | (environment-define env 'a 1) | |
034b924f DH |
975 | (eqv? (func) 0))) |
976 | ||
977 | (pass-if "unobserve an inactive observer" | |
978 | (let* ((local (make-leaf-environment)) | |
979 | (imported (make-leaf-environment)) | |
980 | (env (make-eval-environment local imported)) | |
981 | (func (make-observer-func)) | |
982 | (observer (environment-observe-weak env func))) | |
5d3e2388 | 983 | (environment-unobserve observer) |
034b924f DH |
984 | (environment-unobserve observer) |
985 | #t)) | |
986 | ||
987 | (pass-if "weak observer gets collected" | |
988 | (gc) | |
989 | (let* ((local (make-leaf-environment)) | |
990 | (imported (make-leaf-environment)) | |
991 | (env (make-eval-environment local imported)) | |
992 | (func (make-observer-func))) | |
5d3e2388 | 993 | (environment-observe-weak env func) |
034b924f | 994 | (gc) |
5d3e2388 | 995 | (environment-define env 'a 1) |
41505259 DH |
996 | (if (not (eqv? (func) 0)) |
997 | (throw 'unresolved) ; note: conservative scanning | |
998 | #t)))) | |
034b924f DH |
999 | |
1000 | ||
1001 | (with-test-prefix "erroneous observers" | |
1002 | ||
1003 | (pass-if "update continues after error" | |
1004 | (let* ((local (make-leaf-environment)) | |
1005 | (imported (make-leaf-environment)) | |
1006 | (env (make-eval-environment local imported)) | |
1007 | (func-1 (make-erroneous-observer-func)) | |
1008 | (func-2 (make-erroneous-observer-func))) | |
5d3e2388 DH |
1009 | (environment-observe env func-1) |
1010 | (environment-observe env func-2) | |
1011 | (catch #t | |
1012 | (lambda () | |
1013 | (environment-define env 'a 1) | |
1014 | #f) | |
1015 | (lambda args | |
034b924f DH |
1016 | (and (eq? (func-1) 1) |
1017 | (eq? (func-2) 1)))))))) | |
1018 | ||
1019 | ||
1020 | ;;; | |
1021 | ;;; leaf-environment based import-environments | |
1022 | ;;; | |
1023 | ||
1024 | (with-test-prefix "leaf-environment based import-environments" | |
1025 | ||
1026 | (with-test-prefix "import-environment?" | |
1027 | ||
1028 | (pass-if "documented?" | |
1029 | (documented? import-environment?)) | |
1030 | ||
1031 | (pass-if "non-environment-object" | |
1032 | (not (import-environment? #f))) | |
1033 | ||
1034 | (pass-if "leaf-environment-object" | |
1035 | (not (import-environment? (make-leaf-environment)))) | |
1036 | ||
1037 | (pass-if "eval-environment-object" | |
1038 | (let* ((local (make-leaf-environment)) | |
1039 | (imported (make-leaf-environment)) | |
1040 | (env (make-eval-environment local imported))) | |
1041 | (not (import-environment? (make-leaf-environment)))))) | |
1042 | ||
1043 | ||
1044 | (with-test-prefix "make-import-environment" | |
1045 | ||
1046 | (pass-if "documented?" | |
1047 | (documented? make-import-environment)))) | |
1048 | ||
dd18d312 NJ |
1049 | ;;; End of commenting out. - NJ 2006-11-02. |
1050 | )) |