27 lines
669 B
Racket
27 lines
669 B
Racket
#lang racket/base
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;; Tests for mapping.rkt.
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(require "mapping.rkt")
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(require rackunit)
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(define-mapping a->b b->a
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(a b))
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(check-equal? (a->b 'a) 'b)
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(check-equal? (b->a 'b) 'a)
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(check-exn exn:fail:contract? (lambda () (a->b 123)))
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(check-exn exn:fail:contract? (lambda () (a->b 'b)))
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(check-exn exn:fail:contract? (lambda () (b->a 123)))
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(check-exn exn:fail:contract? (lambda () (b->a 'a)))
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(define-mapping c->d d->c
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#:forward-default (lambda (x) 'default-d)
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#:backward-default (lambda (x) 'default-c)
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(c 123)
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(e 234))
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(check-equal? (c->d 'c) 123)
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(check-equal? (d->c 234) 'e)
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(check-equal? (c->d 'other) 'default-d)
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(check-equal? (d->c '235) 'default-c)
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