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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.
|#
(import (scheme base)
(mcgoron srfi 64)
(SAHP)
(srfi 64) (srfi 252))
(test-runner-factory factory)
(test-runner-current (test-runner-create))
(set-verbosity! '(fails group-stack))
(define iref (make-new-SAHP))
(set-global-SAHP! iref 'vector vector-ref)
(set-global-SAHP! iref 'bytevector bytevector-u8-ref)
(define (iref-works-with-vector v)
(let loop ((i 0))
(cond
((= i (vector-length v)) #t)
((= (vector-ref v i) (iref v i)) (loop (+ i 1)))
(else #f))))
(define (iref-works-with-bytevector v)
(let loop ((i 0))
(cond
((= i (bytevector-length v)) #t)
((= (bytevector-u8-ref v i) (iref v i)) (loop (+ i 1)))
(else #f))))
(define (override-vector-in-dynamic-scope procedure)
(lambda (v)
(define cntr 0)
(parameterize-SAHP ((iref ('vector
(lambda (v i)
(set! cntr (+ cntr 1))
(vector-ref v i)))))
(procedure v (lambda () cntr)))))
(test-group "iref"
(test-group "global scope"
(test-group "on vectors"
(test-property iref-works-with-vector
(list (vector-generator-of (exact-integer-generator)))))
(test-group "on bytevectors"
(test-property iref-works-with-bytevector
(list (bytevector-generator))))
(test-group "undefined raises error"
(test-assert
(guard (c
((SAHP-implementation-not-found-error? c) #t)
(else #f))
(iref '() 0)))))
(test-group "dynamic scope"
(test-group "override in dynamic scope"
(define (impl v cntr)
(test-assert "works" (iref-works-with-vector v))
(test-equal "counted" (vector-length v) (cntr)))
(test-property (override-vector-in-dynamic-scope impl)
(list (vector-generator-of (exact-integer-generator)))))
(test-group "override in dynamic scope does not affect other implementations"
(define (impl bc cntr)
(test-assert "works" (iref-works-with-bytevector bc))
(test-equal "did not count" 0 (cntr)))
(test-property (override-vector-in-dynamic-scope impl)
(list (bytevector-generator)))))
(test-group "local scope"
(test-group "override in local scope doesnt affect global scope"
(define (override v)
(define cntr 0)
(letrec-SAHP ((iref ('vector
(lambda (v i)
(set! cntr (+ cntr 1))
(vector-ref v i)))))
(and (iref-works-with-vector v)
(= cntr 0))))
(test-property override
(list (vector-generator-of
(exact-integer-generator)))))
(test-group "override in local scope affects lexical scope"
(define (override v)
(define cntr 0)
(letrec-SAHP ((iref ('vector
(lambda (v i)
(set! cntr (+ cntr 1))
(vector-ref v i)))))
(let loop ((i 0))
(cond
((= i (vector-length v)) (= cntr i))
((= (vector-ref v i) (iref v i)) (loop (+ i 1)))
(else #f)))))
(test-property override
(list (vector-generator-of
(exact-integer-generator)))))
(test-group "override in local scope overrides dynamic scope"
(define (override v)
(define cntr 0)
(letrec-SAHP ((iref ('vector
(lambda (v i)
(set! cntr (+ cntr 1))
(vector-ref v i)))))
(parameterize-SAHP ((iref ('vector vector-ref)))
(let loop ((i 0))
(cond
((= i (vector-length v)) (= cntr i))
((= (vector-ref v i) (iref v i)) (loop (+ i 1)))
(else #f))))))
(test-property override
(list (vector-generator-of
(exact-integer-generator)))))
(test-group "override in local scope only affects that type"
(define (override bv)
(define cntr 0)
(letrec-SAHP ((iref ('vector
(lambda (v i)
(set! cntr (+ cntr 1))
(vector-ref v i)))))
(let loop ((i 0))
(cond
((= i (bytevector-length bv)) (= cntr 0))
((= (bytevector-u8-ref bv i) (iref bv i)) (loop (+ i 1)))
(else #f)))))
(test-property override (list (bytevector-generator))))))
(test-group "subtyping"
(define sub (make-new-SAHP))
(define (test-for-all)
(test-assert "exact integer" (sub 0))
(test-assert "integer" (sub 1.0))
(test-assert "rational" (sub 1/2))
(test-assert "real" (sub +inf.0))
(test-assert "complex" (sub 1+2i))
(test-assert "not implemented"
(guard (c
(else
(SAHP-implementation-not-found-error? c)))
(sub "not a number")
#f)))
(define (test-for-some)
(test-assert "exact integer" (sub 0))
(test-assert "integer" (sub 1.0))
(test-assert "rational" (sub 1/2))
(test-assert "not for complex"
(guard (c
(else
(SAHP-implementation-not-found-error? c)))
(sub +inf.0))))
(test-group "local scope"
(test-group "subtypes flow downwards"
(letrec-SAHP ((sub ('number (lambda (x) #t))))
(test-assert "exact integer" (sub 0))
(test-assert "integer" (sub 1.0))
(test-assert "rational" (sub 1/2))
(test-assert "real" (sub +inf.0))
(test-assert "complex" (sub 1+2i))
(test-assert "not implemented"
(guard (c
(else
(SAHP-implementation-not-found-error? c)))
(sub "not a number")
#f))))
(test-group "subtypes do not flow upwards"
(letrec-SAHP ((sub ('rational (lambda (x) #t))))
(test-assert "exact integer" (sub 0))
(test-assert "integer" (sub 1.0))
(test-assert "rational" (sub 1/2))
(test-assert "not for complex"
(guard (c
(else
(SAHP-implementation-not-found-error? c)))
(sub +inf.0))))))
(test-group "dynamic scope"
(test-group "subtypes flow downwards"
(parameterize-SAHP ((sub ('number (lambda (x) #t))))
(test-for-all)))
(test-group "subtypes do not flow upwards"
(parameterize-SAHP ((sub ('rational (lambda (x) #t))))
(test-for-some)))
(test-group "local scope overrides dynamic scope subtyping"
(parameterize-SAHP ((sub ('number (lambda (x) 1))))
(letrec-SAHP ((sub ('rational (lambda (x) 2))))
(test-equal 2 (sub 0))
(test-equal 2 (sub 1/2))
(test-equal 1 (sub 1+2i)))))))
|
