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(assert (vector? (make-vector)))
(assert (not (vector? 1)))
(defvar v (make-vector))
(assert (= 0 (vector-length v)))
(assert-error (vector-ref v 0))
(vector-append v 0)
(vector-append v "123")
(vector-append v 1.2)
(assert (= 3 (vector-length v)))
(vector-insert v 1 99)
(assert (equal? (vector-ref v 0) 0))
(assert (equal? (vector-ref v 1) 99))
(assert (equal? (vector-ref v 2) "123"))
(assert (equal? (vector-ref v 3) 1.2))
(vector-remove v 2)
(assert (equal? (vector-ref v 2) 1.2))
(assert (equal? (vector-ref v 1) 99))
(defvar x 2)
(vector-append v x)
(vector-set v 3 3)
(assert (= x 2))
(assert (= 3 (vector-ref v 3)))
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