(define-library (srfi 128 test)
  (export run-tests)
  (import (scheme base) (srfi 128) (chibi test))
  (begin
    (define default-comparator (make-default-comparator))
    (define real-comparator (make-comparator real? = < number-hash))
    (define degenerate-comparator (make-comparator (lambda (x) #t) equal? #f #f))
    (define boolean-comparator
      (make-comparator boolean? eq? (lambda (x y) (and (not x) y)) boolean-hash))
    (define bool-pair-comparator
      (make-pair-comparator boolean-comparator boolean-comparator))
    (define num-list-comparator
      (make-list-comparator real-comparator list? null? car cdr))
    (define num-vector-comparator
      (make-vector-comparator real-comparator vector? vector-length vector-ref))
    (define (vector-cdr vec)
      (let* ((len (vector-length vec))
             (result (make-vector (- len 1))))
        (let loop ((n 1))
          (cond
           ((= n len) result)
           (else (vector-set! result (- n 1) (vector-ref vec n))
                 (loop (+ n 1)))))))
    (define vector-qua-list-comparator
      (make-list-comparator
       real-comparator
       vector?
       (lambda (vec) (= 0 (vector-length vec)))
       (lambda (vec) (vector-ref vec 0))
       vector-cdr))
    (define list-qua-vector-comparator
      (make-vector-comparator default-comparator list? length list-ref))
    (define eq-comparator (make-eq-comparator))
    (define eqv-comparator (make-eqv-comparator))
    (define equal-comparator (make-equal-comparator))
    (define symbol-comparator
      (make-comparator
       symbol?
       eq?
       (lambda (a b) (string<? (symbol->string a) (symbol->string b)))
       symbol-hash))
    (define (run-tests)
      (test-group "srfi-128: comparators"
        (test '#(2 3 4) (vector-cdr '#(1 2 3 4)))
        (test '#() (vector-cdr '#(1)))

        (test-group "comparators/predicates"
          (test-assert (comparator? real-comparator))
          (test-assert (not (comparator? =)))
          (test-assert (comparator-ordered? real-comparator))
          (test-assert (comparator-hashable? real-comparator))
          (test-assert (not (comparator-ordered? degenerate-comparator)))
          (test-assert (not (comparator-hashable? degenerate-comparator)))
          )                              ; end comparators/predicates

        (test-group "comparators/constructors"
          (test-assert (=? boolean-comparator #t #t))
          (test-assert (not (=? boolean-comparator #t #f)))
          (test-assert (<? boolean-comparator #f #t))
          (test-assert (not (<? boolean-comparator #t #t)))
          (test-assert (not (<? boolean-comparator #t #f)))

          (test-assert (comparator-test-type bool-pair-comparator '(#t . #f)))
          (test-assert (not (comparator-test-type bool-pair-comparator 32)))
          (test-assert (not (comparator-test-type bool-pair-comparator '(32 . #f))))
          (test-assert (not (comparator-test-type bool-pair-comparator '(#t . 32))))
          (test-assert (not (comparator-test-type bool-pair-comparator '(32 . 34))))
          (test-assert (=? bool-pair-comparator '(#t . #t) '(#t . #t)))
          (test-assert (not (=? bool-pair-comparator '(#t . #t) '(#f . #t))))
          (test-assert (not (=? bool-pair-comparator '(#t . #t) '(#t . #f))))
          (test-assert (<? bool-pair-comparator '(#f . #t) '(#t . #t)))
          (test-assert (<? bool-pair-comparator '(#t . #f) '(#t . #t)))
          (test-assert (not (<? bool-pair-comparator '(#t . #t) '(#t . #t))))
          (test-assert (not (<? bool-pair-comparator '(#t . #t) '(#f . #t))))
          (test-assert (not (<? bool-pair-comparator '(#f . #t) '(#f . #f))))

          (test-assert (comparator-test-type num-vector-comparator '#(1 2 3)))
          (test-assert (comparator-test-type num-vector-comparator '#()))
          (test-assert (not (comparator-test-type num-vector-comparator 1)))
          (test-assert (not (comparator-test-type num-vector-comparator '#(a 2 3))))
          (test-assert (not (comparator-test-type num-vector-comparator '#(1 b 3))))
          (test-assert (not (comparator-test-type num-vector-comparator '#(1 2 c))))
          (test-assert (=? num-vector-comparator '#(1 2 3) '#(1 2 3)))
          (test-assert (not (=? num-vector-comparator '#(1 2 3) '#(4 5 6))))
          (test-assert (not (=? num-vector-comparator '#(1 2 3) '#(1 5 6))))
          (test-assert (not (=? num-vector-comparator '#(1 2 3) '#(1 2 6))))
          (test-assert (<? num-vector-comparator '#(1 2) '#(1 2 3)))
          (test-assert (<? num-vector-comparator '#(1 2 3) '#(2 3 4)))
          (test-assert (<? num-vector-comparator '#(1 2 3) '#(1 3 4)))
          (test-assert (<? num-vector-comparator '#(1 2 3) '#(1 2 4)))
          (test-assert (<? num-vector-comparator '#(3 4) '#(1 2 3)))
          (test-assert (not (<? num-vector-comparator '#(1 2 3) '#(1 2 3))))
          (test-assert (not (<? num-vector-comparator '#(1 2 3) '#(1 2))))
          (test-assert (not (<? num-vector-comparator '#(1 2 3) '#(0 2 3))))
          (test-assert (not (<? num-vector-comparator '#(1 2 3) '#(1 1 3))))

          (test-assert (not (<? vector-qua-list-comparator '#(3 4) '#(1 2 3))))
          (test-assert (<? list-qua-vector-comparator '(3 4) '(1 2 3)))

          (let ((bool-pair (cons #t #f))
                (bool-pair-2 (cons #t #f))
                (reverse-bool-pair (cons #f #t)))
            (test-assert (=? eq-comparator #t #t))
            (test-assert (not (=? eq-comparator #f #t)))
            (test-assert (=? eqv-comparator bool-pair bool-pair))
            (test-assert (not (=? eqv-comparator bool-pair bool-pair-2)))
            (test-assert (=? equal-comparator bool-pair bool-pair-2))
            (test-assert (not (=? equal-comparator bool-pair reverse-bool-pair))))
          )                              ; end comparators/constructors

        (test-group "comparators/hash"
          (test-assert (exact-integer? (boolean-hash #f)))
          (test-assert (not (negative? (boolean-hash #t))))
          (test-assert (exact-integer? (char-hash #\a)))
          (test-assert (not (negative? (char-hash #\b))))
          (test-assert (exact-integer? (char-ci-hash #\a)))
          (test-assert (not (negative? (char-ci-hash #\b))))
          (test-assert (= (char-ci-hash #\a) (char-ci-hash #\A)))
          (test-assert (exact-integer? (string-hash "f")))
          (test-assert (not (negative? (string-hash "g"))))
          (test-assert (exact-integer? (string-ci-hash "f")))
          (test-assert (not (negative? (string-ci-hash "g"))))
          (test-assert (= (string-ci-hash "f") (string-ci-hash "F")))
          (test-assert (exact-integer? (symbol-hash 'f)))
          (test-assert (not (negative? (symbol-hash 't))))
          (test-assert (exact-integer? (number-hash 3)))
          (test-assert (not (negative? (number-hash 3))))
          (test-assert (exact-integer? (number-hash -3)))
          (test-assert (not (negative? (number-hash -3))))
          (test-assert (exact-integer? (number-hash 3.0)))
          (test-assert (not (negative? (number-hash 3.0))))
          (test-assert (exact-integer? (number-hash 3.47)))
          (test-assert (not (negative? (number-hash 3.47))))
          (test-assert (exact-integer? (default-hash '())))
          (test-assert (not (negative? (default-hash '()))))
          (test-assert (exact-integer? (default-hash '(a "b" #\c #(dee) 2.718))))
          (test-assert (not (negative? (default-hash '(a "b" #\c #(dee) 2.718)))))
          (test-assert (exact-integer? (default-hash '#u8())))
          (test-assert (not (negative? (default-hash '#u8()))))
          (test-assert (exact-integer? (default-hash '#u8(8 6 3))))
          (test-assert (not (negative? (default-hash '#u8(8 6 3)))))
          (test-assert (exact-integer? (default-hash '#())))
          (test-assert (not (negative? (default-hash '#()))))
          (test-assert (exact-integer? (default-hash '#(a "b" #\c #(dee) 2.718))))
          (test-assert (not (negative? (default-hash '#(a "b" #\c #(dee) 2.718)))))

          )                              ; end comparators/hash

        (test-group "comparators/default"
          (test-assert (<? default-comparator '() '(a)))
          (test-assert (not (=? default-comparator '() '(a))))
          (test-assert (=? default-comparator #t #t))
          (test-assert (not (=? default-comparator #t #f)))
          (test-assert (<? default-comparator #f #t))
          (test-assert (not (<? default-comparator #t #t)))
          (test-assert (=? default-comparator #\a #\a))
          (test-assert (<? default-comparator #\a #\b))

          (test-assert (comparator-test-type default-comparator '()))
          (test-assert (comparator-test-type default-comparator #t))
          (test-assert (comparator-test-type default-comparator #\t))
          (test-assert (comparator-test-type default-comparator '(a)))
          (test-assert (comparator-test-type default-comparator 'a))
          (test-assert (comparator-test-type default-comparator (make-bytevector 10)))
          (test-assert (comparator-test-type default-comparator 10))
          (test-assert (comparator-test-type default-comparator 10.0))
          (test-assert (comparator-test-type default-comparator "10.0"))
          (test-assert (comparator-test-type default-comparator '#(10)))

          (test-assert (=? default-comparator '(#t . #t) '(#t . #t)))
          (test-assert (not (=? default-comparator '(#t . #t) '(#f . #t))))
          (test-assert (not (=? default-comparator '(#t . #t) '(#t . #f))))
          (test-assert (<? default-comparator '(#f . #t) '(#t . #t)))
          (test-assert (<? default-comparator '(#t . #f) '(#t . #t)))
          (test-assert (not (<? default-comparator '(#t . #t) '(#t . #t))))
          (test-assert (not (<? default-comparator '(#t . #t) '(#f . #t))))
          (test-assert (not (<? default-comparator '#(#f #t) '#(#f #f))))

          (test-assert (=? default-comparator '#(#t #t) '#(#t #t)))
          (test-assert (not (=? default-comparator '#(#t #t) '#(#f #t))))
          (test-assert (not (=? default-comparator '#(#t #t) '#(#t #f))))
          (test-assert (<? default-comparator '#(#f #t) '#(#t #t)))
          (test-assert (<? default-comparator '#(#t #f) '#(#t #t)))
          (test-assert (not (<? default-comparator '#(#t #t) '#(#t #t))))
          (test-assert (not (<? default-comparator '#(#t #t) '#(#f #t))))
          (test-assert (not (<? default-comparator '#(#f #t) '#(#f #f))))

          (test-assert (= (comparator-hash default-comparator #t) (boolean-hash #t)))
          (test-assert (= (comparator-hash default-comparator #\t) (char-hash #\t)))
          (test-assert (= (comparator-hash default-comparator "t") (string-hash "t")))
          (test-assert (= (comparator-hash default-comparator 't) (symbol-hash 't)))
          (test-assert (= (comparator-hash default-comparator 10) (number-hash 10)))
          (test-assert (= (comparator-hash default-comparator 10.0) (number-hash 10.0)))

          (comparator-register-default!
           (make-comparator procedure? (lambda (a b) #t) (lambda (a b) #f) (lambda (obj) 200)))
          (test-assert (=? default-comparator (lambda () #t) (lambda () #f)))
          (test-assert (not (<? default-comparator (lambda () #t) (lambda () #f))))
          ;;(test 200 (comparator-hash default-comparator (lambda () #t)))

          )                              ; end comparators/default

        ;; SRFI 128 does not actually require a comparator's four procedures
        ;; to be eq? to the procedures originally passed to make-comparator.
        ;; For interoperability/interchangeability between the comparators
        ;; of SRFI 114 and SRFI 128, some of the procedures passed to
        ;; make-comparator may need to be wrapped inside another lambda
        ;; expression before they're returned by the corresponding accessor.
        ;;
        ;; So this next group of tests is incorrect, hence commented out
        ;; and replaced by a slightly less naive group of tests.

        #;
        (test-group "comparators/accessors"
        (define ttp (lambda (x) #t))
        (define eqp (lambda (x y) #t))
        (define orp (lambda (x y) #t))
        (define hf (lambda (x) 0))
        (define comp (make-comparator ttp eqp orp hf))
        (test ttp (comparator-type-test-predicate comp))
        (test eqp (comparator-equality-predicate comp))
        (test orp (comparator-ordering-predicate comp))
        (test hf (comparator-hash-function comp))
        )                                ; end comparators/accessors

        (test-group "comparators/accessors"
          (define x1 0)
          (define x2 0)
          (define x3 0)
          (define x4 0)
          (define ttp (lambda (x) (set! x1 111) #t))
          (define eqp (lambda (x y) (set! x2 222) #t))
          (define orp (lambda (x y) (set! x3 333) #t))
          (define hf (lambda (x) (set! x4 444) 0))
          (define comp (make-comparator ttp eqp orp hf))
          (test #t (and ((comparator-type-test-predicate comp) x1)   (= x1 111)))
          (test #t (and ((comparator-equality-predicate comp) x1 x2) (= x2 222)))
          (test #t (and ((comparator-ordering-predicate comp) x1 x3) (= x3 333)))
          (test #t (and (zero? ((comparator-hash-function comp) x1)) (= x4 444)))
          )                              ; end comparators/accessors

        (test-group "comparators/invokers"
          (test-assert (comparator-test-type real-comparator 3))
          (test-assert (comparator-test-type real-comparator 3.0))
          (test-assert (not (comparator-test-type real-comparator "3.0")))
          (test-assert (comparator-check-type boolean-comparator #t))
          (test-error (comparator-check-type boolean-comparator 't))
          )                              ; end comparators/invokers

        (test-group "comparators/comparison"
          (test-assert (=? real-comparator 2 2.0 2))
          (test-assert (<? real-comparator 2 3.0 4))
          (test-assert (>? real-comparator 4.0 3.0 2))
          (test-assert (<=? real-comparator 2.0 2 3.0))
          (test-assert (>=? real-comparator 3 3.0 2))
          (test-assert (not (=? real-comparator 1 2 3)))
          (test-assert (not (<? real-comparator 3 1 2)))
          (test-assert (not (>? real-comparator 1 2 3)))
          (test-assert (not (<=? real-comparator 4 3 3)))
          (test-assert (not (>=? real-comparator 3 4 4.0)))

          )                              ; end comparators/comparison

        (test-group "comparators/syntax"
          (test 'less (comparator-if<=> real-comparator 1 2 'less 'equal 'greater))
          (test 'equal (comparator-if<=> real-comparator 1 1 'less 'equal 'greater))
          (test 'greater (comparator-if<=> real-comparator 2 1 'less 'equal 'greater))
          (test 'less (comparator-if<=> "1" "2" 'less 'equal 'greater))
          (test 'equal (comparator-if<=> "1" "1" 'less 'equal 'greater))
          (test 'greater (comparator-if<=> "2" "1" 'less 'equal 'greater))

          )                              ; end comparators/syntax

        (test-group "comparators/bound-salt"
          (test-assert (exact-integer? (hash-bound)))
          (test-assert (exact-integer? (hash-salt)))
          (test-assert (< (hash-salt) (hash-bound)))
          #;  (test (hash-salt) (fake-salt-hash #t))  ; no such thing as fake-salt-hash
          )                              ; end comparators/bound-salt

        ))))                             ; end comparators