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|
#| Copyright (c) Peter McGoron 2025
|
| 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.
|
| To test: ellipsis and underscore as literals override their usual
| behavior.
|#
(define ellipsis (empty-wrap '...))
(define empty-map (hashmap bound-identifier-comparator))
(define empty-set (set bound-identifier-comparator))
(define (test-single-match)
(define-values (matcher names)
(compile-pattern '() (empty-wrap 'x)))
(test-equal "nesting info of identifier"
(cons 0 #f)
(hashmap-ref names (empty-wrap 'x)))
(let ((returned (matcher (empty-wrap 'y))))
(test-assert "identifier"
(bound-identifier=? (hashmap-ref returned
(empty-wrap 'x))
(empty-wrap 'y))))
(let* ((returned (matcher (list
(empty-wrap 'y))))
(res (hashmap-ref returned (empty-wrap 'x))))
(test-assert "match on list returns list" (list? res))
(test-assert "is the same list"
(bound-identifier=? (list-ref res 0)
(empty-wrap 'y)))))
(define (test-match-in-list)
(define-values (matcher names)
(compile-pattern '() (list (empty-wrap 'x))))
(test-equal "nesting info of identifier"
(cons 0 #f)
(hashmap-ref names (empty-wrap 'x)))
(let ((returned (matcher (empty-wrap 'y))))
(test-assert "does not match identifier"
(not returned)))
(let ((returned (matcher (list (empty-wrap 'y)))))
(test-assert "matches inside of list"
(bound-identifier=? (hashmap-ref returned (empty-wrap 'x))
(empty-wrap 'y)))))
(define (test-multiple-matches-in-list)
(define-values (matcher names)
(compile-pattern '() (list (empty-wrap 'x)
(empty-wrap 'y))))
(test-equal "nesting info of x"
(cons 0 #f)
(hashmap-ref names (empty-wrap 'x)))
(test-equal "nesting info of y"
(cons 0 #f)
(hashmap-ref names (empty-wrap 'y)))
(let ((returned (matcher (list 1 2))))
(test-equal "first" 1 (hashmap-ref returned (empty-wrap 'x)))
(test-equal "second" 2 (hashmap-ref returned (empty-wrap 'y)))))
(define (test-simple-ellipsis)
(define-values (matcher names)
(compile-pattern '() (list (empty-wrap 'x) ellipsis)))
(test-equal "nesting level of x"
1
(car (hashmap-ref names (empty-wrap 'x))))
(let* ((list '(1 2 3 4 5 6 7 8))
(returned (matcher list))
(x-value (hashmap-ref returned (empty-wrap 'x))))
(test-equal "(1 2 3 ...)"
(reverse list)
x-value))
(let ((returned (matcher '())))
(test-equal "()"
'()
(hashmap-ref returned (empty-wrap 'x))))
(let* ((list (list (empty-wrap 'x)
1
(empty-wrap 'y)))
(returned (matcher list))
(values (hashmap-ref returned (empty-wrap 'x))))
(test-group "(x 1 y)"
(test-assert "y"
(bound-identifier=?
(list-ref values 0)
(empty-wrap 'y)))
(test-equal 1 (list-ref values 1))
(test-assert "x"
(bound-identifier=?
(list-ref values 2)
(empty-wrap 'x))))))
(define (test-multiple-ellipsis)
(define-values (matcher names)
(compile-pattern '()
(list (list (empty-wrap 'x) ellipsis)
(list (empty-wrap 'y) ellipsis))))
(define (test-for list x y)
(let ((returned (matcher list)))
(test-equal "x"
x
(hashmap-ref returned (empty-wrap 'x)))
(test-equal "y"
y
(hashmap-ref returned (empty-wrap 'y)))))
(test-group "two lists"
(test-for '((1 2 3 4) (5 6 7 8))
'(4 3 2 1)
'(8 7 6 5)))
(test-group "one list"
(test-for '((1 2 3 4) ())
'(4 3 2 1)
'())))
(define (test-compound-ellipsis)
(define-values (matcher names)
(compile-pattern '()
(list (list (empty-wrap 'name) (empty-wrap 'value))
ellipsis)))
(define (test-for list x y)
(let ((returned (matcher list)))
(test-equal "x"
x
(hashmap-ref returned (empty-wrap 'x)))
(test-equal "y"
y
(hashmap-ref returned (empty-wrap 'y)))))
(test-group "pairs"
(test-for '((1 2) (3 4) (5 6))
'(5 3 1)
'(6 4 2)))
(test-group "empty"
(test-for '() '() '())))
(define (test-nested-ellipsis)
(define-values (matcher names)
(compile-pattern '()
(list (list (list (empty-wrap 'name) ellipsis)
(empty-wrap 'value))
ellipsis)))
(define (test-of form names values)
(let ((returned (matcher form)))
(test-equal "names"
names
(hashmap-ref returned (empty-wrap 'name)))
(test-equal "values"
values
(hashmap-ref returned (empty-wrap 'value)))))
(test-group "let-values like form"
(test-of '((("name1" "name2" "name3") "value1")
(("name4" "name5" "name6") "value2"))
'(("name6" "name5" "name4")
("name3" "name2" "name1"))
'("value2" "value1")))
(test-assert "non list fails"
(not (matcher '(("name1 value1") ("name2" "value2")))))
(test-assert "partial non list fails"
(not
(matcher
'((("name1" "name2") "value1")
("name3" "value3"))))))
(define (test-single-literal)
(define literal-list (list (empty-wrap 'literal)))
(define-values (matcher names)
(compile-pattern literal-list
(list (empty-wrap 'literal) (empty-wrap 'x))))
(test-assert "without literal fails"
(not
(matcher '("literal" "value"))))
(test-group "with literal succeeds"
(let ((returned (matcher `(,(empty-wrap 'literal) "value"))))
(test-equal "x"
"value"
(hashmap-ref returned (empty-wrap 'x))))))
(define (test-ignored-pattern)
(define-values (matcher names)
(compile-pattern '()
(list (empty-wrap '_) (empty-wrap 'x))))
(test-equal "names is length 1"
1
(hashmap-size names))
(test-assert "names contains x"
(hashmap-contains? names (empty-wrap 'x)))
(let ((returned (matcher '(1 2))))
(test-equal "x"
2
(hashmap-ref returned (empty-wrap 'x)))))
(define (test-matching-a-vector)
(define-values (matcher names)
(compile-pattern (list (empty-wrap 'then))
(vector (empty-wrap 'x)
ellipsis
(empty-wrap 'then)
(empty-wrap 'y))))
(let ((returned (matcher (vector 1 2 3 4 5
(empty-wrap 'then)
6))))
(test-assert "matched" returned)
(test-equal "x"
'(5 4 3 2 1)
(hashmap-ref returned (empty-wrap 'x)))
(test-equal "y"
6
(hashmap-ref returned (empty-wrap 'y)))))
(define (test-patterns)
(test-group "single match" (test-single-match))
(test-group "test match in list" (test-match-in-list))
(test-group "test multiple matches in list"
(test-multiple-matches-in-list))
(test-group "simple ellipsis" (test-simple-ellipsis))
(test-group "test multiple ellipsis" (test-multiple-ellipsis))
(test-group "test nested ellipsis" (test-nested-ellipsis))
(test-group "test single literal" (test-single-literal))
(test-group "test ignored pattern" (test-ignored-pattern))
(test-group "test matching a vector" (test-matching-a-vector)))
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