;;;; box-test.scm  -*- Scheme -*-
;;;; Kon Lovett, Jul '18

(import test)

(test-begin "Box")

;;;

(import box)

(test-group "Box Mutable"
	(let ((tbox #f))
    (test-assert (make-box (void)))
    (set! tbox (make-box (void)))
    (test-assert (box? tbox))
    (box-set! tbox #t)
    (test-assert (box-ref tbox))
    (test-assert (not (box? 3))) )
)

(test-group "Box Immutable"
	(let ((tbox #f))
    (test-assert (make-box #f #t))
    (set! tbox (make-box #f #t))
    (test-assert (box? tbox))
    (test-assert (not (box-ref tbox)))
    (test-error (box-set! tbox #t)) )
)

(test-group "Box References"
	(let ((var (void))
        (tbox #f))
    (test-assert (make-box-variable var))
    (set! tbox (make-box-variable var))
    (test-assert (box? tbox))
    (test-assert (box-variable? tbox))
    (test-assert (not (box-location? tbox)))
    (test "Unbound Box" (void) (box-ref tbox))
    (set! (box-ref tbox) #t)
    (test-assert "Bound Box" (box-ref tbox))
    (test-assert "Bound Var" var)
    (test-assert (not (box? 3))) )
)

(test-group "Box Swap"
	(let ((tbox #f))
    (test-assert (make-box (void)))
    (set! tbox (make-box 0))
    (test-assert (box? tbox))
    (test 1 (box-swap! tbox + 1))
    (test 1 (box-ref tbox))
    (test 2 (box-swap! tbox add1))
    (test 2 (box-ref tbox)) )
)

;;;

(test-end "Box")

(test-exit)