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;; Property-based testing extension for SRFI 64.
;; SPDX-License-Identifier: MIT
;; Copyright 2024 Antero Mejr <mail@antr.me>
;; Permission is hereby granted, free of charge, to any person
;; obtaining a copy of this software and associated documentation
;; files (the "Software"), to deal in the Software without
;; restriction, including without limitation the rights to use, copy,
;; modify, merge, publish, distribute, sublicense, and/or sell copies
;; of the Software, and to permit persons to whom the Software is
;; furnished to do so, subject to the following conditions:
;; The above copyright notice and this permission notice shall be
;; included in all copies or substantial portions of the Software.
;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
;; EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
;; MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
;; NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
;; BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
;; ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
;; CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
;; SOFTWARE.
(define-library (srfi 252)
(import (scheme base)
(scheme case-lambda)
(srfi 64)
(srfi 252 generators)
(chicken condition))
(export test-property test-property-expect-fail test-property-skip
test-property-error test-property-error-type
property-test-runner
;; Generator procedures
boolean-generator bytevector-generator
char-generator string-generator symbol-generator
;; exact number generators
exact-complex-generator exact-integer-generator
exact-number-generator exact-rational-generator
exact-real-generator
exact-integer-complex-generator
;; inexact number generators
inexact-complex-generator inexact-integer-generator
inexact-number-generator inexact-rational-generator
inexact-real-generator
;; Unions of numerical generators
complex-generator integer-generator
number-generator rational-generator
real-generator
;; Special generators
list-generator-of pair-generator-of procedure-generator-of
vector-generator-of)
(begin
;; Number of property tests to run by default.
(define default-runs 100)
;; Runner
(define property-test-runner test-runner-create)
;; Test procedures
(define (prop-test property generators runs)
(unless (and (integer? runs)
(not (negative? runs)))
(error "runs must be a non-negative integer" runs))
(do ((n 0 (+ n 1)))
((= n runs))
(test-assert
(apply property
(let ((args (map (lambda (gen) (gen)) generators))
(runner (test-runner-current)))
(test-result-set! runner 'property-test-arguments args)
(test-result-set! runner 'property-test-iteration
(+ n 1))
(test-result-set! runner 'property-test-iterations runs)
args)))))
(define (prop-test-error type property generators runs)
(unless (and (integer? runs)
(not (negative? runs)))
(error "runs must be a non-negative integer" runs))
(do ((n 0 (+ n 1)))
((= n runs))
(test-error
type
(apply property
(let ((args (map (lambda (gen) (gen)) generators))
(runner (test-runner-current)))
(test-result-set! runner 'property-test-arguments args)
(test-result-set! runner 'property-test-iteration (+ n 1))
(test-result-set! runner 'property-test-iterations runs)
args)))))
(define test-property-error
(case-lambda
((property generators)
(prop-test-error #t property generators default-runs))
((property generators n)
(prop-test-error #t property generators n))))
(define test-property-error-type
(case-lambda
((type property generators)
(prop-test-error type property generators default-runs))
((type property generators n)
(prop-test-error type property generators n))))
(define test-property-skip
(case-lambda
((property generators)
(begin (test-skip default-runs)
(prop-test property generators default-runs)))
((property generators n)
(begin (test-skip n)
(prop-test property generators n)))))
(define test-property-expect-fail
(case-lambda
((property generators)
(begin (test-expect-fail default-runs)
(prop-test property generators default-runs)))
((property generators n)
(begin (test-expect-fail n)
(prop-test property generators n)))))
(define test-property
(case-lambda
((property generators)
(prop-test property generators default-runs))
((property generators n)
(prop-test property generators n))))))
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