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|
#| Copyright 2024 Peter McGoron
|
| Licensed under the Apache License, Version 2.0 (the "License");
| you may not use this file except in compliance with the License.
| You may obtain a copy of the License at
|
| http://www.apache.org/licenses/LICENSE-2.0
|
| Unless required by applicable law or agreed to in writing, software
| distributed under the License is distributed on an "AS IS" BASIS,
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
| See the License for the specific language governing permissions and
| limitations under the License.
|#
(define (orderable-generator)
;; Return a value that can be ordered in an obvious way.
(gsampling (boolean-generator)
(real-generator)
(char-generator)
(string-generator)
(bytevector-generator)))
(define (remove-duplicates generator)
;; Remove duplicates (according to the default comparator) from vectors
;; made by `generator`.
(gmap (lambda (vec)
(let* ((cmp (make-default-comparator))
(table (make-hash-table (cut =? cmp <> <>) hash-by-identity))
(n 0))
(vector-for-each
(lambda (value)
(when (hash-table-ref/default table value #f)
(hash-table-set! table value #t)
(set! n (+ n 1))))
vec)
(let ((new-vec (make-vector n))
(n 0))
(hash-table-walk table
(lambda (key _)
(vector-set! new-vec n key)
(set! n (+ n 1))))
new-vec)))
generator))
(define (%set . elements)
(apply set (make-default-comparator) elements))
;;; ;;;;;;;;;;;;;;;;;;;;
;;; Tests
;;; ;;;;;;;;;;;;;;;;;;;;
(test-group "set-empty?"
(test-assert "empty" (set-empty? (%set)))
(test-assert "not empty 1" (not (set-empty? (%set 0))))
(test-assert "not empty 2" (not (set-empty? (%set 0 1))))
(test-assert "not empty 3" (not (set-empty? (%set 0 1 2))))
(test-assert "not empty 4" (not (set-empty? (%set 0 1 2 3)))))
(test-group "lengths"
(test-call "0" (= 0 (set-size (%set))))
(test-call "1" (= 1 (set-size (%set 0))))
(test-call "2" (= 2 (set-size (%set 0 1))))
(test-call "3" (= 3 (set-size (%set 0 1 2))))
(test-call "4" (= 4 (set-size (%set 0 1 2 3)))))
(test-group "set->list"
(test-call "empty" (eq? '() (set->list (%set))))
(test-call "1" (lset= = '(1) (set->list (%set 1))))
(test-call "2" (lset= = '(1 2) (set->list (%set 1 2))))
(test-call "3" (lset= = '(0 1 2) (set->list (%set 0 1 2))))
(test-call "4" (lset= = '(0 1 2 3) (set->list (%set 0 1 2 3)))))
(define (test-create-with-duplicates creator)
(lambda (vec)
(let* ((lst (vector->list vec))
(new-set (creator lst))
(set-as-list (set->list new-set)))
(test-assert "set?" (set? new-set))
(if (null? lst)
(test-assert "empty?" (set-empty? new-set))
(test-assert "empty?" (not (set-empty? new-set))))
;; The new-set will remove duplicates.
(test-call "length?" (<= (set-size new-set) (length lst)))
(test-call "subset of inserted" (lset<= equal? set-as-list lst)))))
(test-group "multiple element set using `list->set` procedure"
(test-property (test-create-with-duplicates
(cute list->set (make-default-comparator) <>))
(list (vector-generator-of (orderable-generator)))))
(test-group "multiple element set using `set` procedure"
(test-property (test-create-with-duplicates
(cute apply set (make-default-comparator) <...>))
(list (vector-generator-of (orderable-generator)))))
(test-group "multiple element set using `set-unfold` procedure"
(test-property (test-create-with-duplicates
(cute set-unfold
(make-default-comparator)
null?
car
cdr
<>))
(list (vector-generator-of (orderable-generator)))))
(define (test-create-without-duplicates creator)
(lambda (vec)
(let* ((lst (vector->list vec))
(new-set (creator lst))
(set-as-list (set->list new-set)))
(test-assert "set?" (set? new-set))
(test-assert "empty?" (if (null? lst)
(set-empty? new-set)
(not (set-empty? new-set))))
(test-equal "length?" (set-size new-set) (length lst))
(test-call "exactly inserted" (lset= equal? set-as-list lst)))))
(test-group "multiple element set using `list->set` procedure, unique elements"
(test-property (test-create-without-duplicates
(cute list->set (make-default-comparator) <>))
(list (remove-duplicates
(vector-generator-of
(orderable-generator))))))
(test-group "multiple element set using `set` procedure, unique elements"
(test-property (test-create-without-duplicates
(cute apply set (make-default-comparator) <...>))
(list (remove-duplicates
(vector-generator-of
(orderable-generator))))))
(test-group "multiple element set using `set-unfold` procedure, unique elements"
(test-property (test-create-without-duplicates
(cute set-unfold
(make-default-comparator)
null?
car
cdr
<>))
(list (remove-duplicates
(vector-generator-of
(orderable-generator))))))
;;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; Set-contains
;;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
