a17-test-code.ss

;; Test code for CSSE 304 Assignment 17

(define (test-set!-local-variables)
    (let ([correct '(
		     73
		     93
		     19
		     8
		     43
		     )]
          [answers 
            (list 
	     (eval-one-exp ' 
	      (let ([f #f] [x 3]) 
		(set! f (lambda (n) 
			  (+ 3 (* n 10)))) 
		(set! x 7) 
		(f x)))
	     (eval-one-exp '((lambda (x) (set! x (+ x 1)) (+ x 2)) 90))
	     (eval-one-exp ' 
	      (let ([x 5] [y 3]) 
		(let ([z (begin (set! x (+ x y)) 
				x)]) 
		  (+ z (+ x y)))))
	     (eval-one-exp ' 
	      (let ([a 5]) 
		(if (not (= a 6)) 
		    (begin (set! a (+ 1 a)) 
			   (set! a (+ 1 a))) 3) (+ 1 a)))
	     (eval-one-exp ' 
	      (let ([f #f]) 
		(let ([dummy (begin (set! f (lambda (n) (+ 3 (* n 10)))) 
				    3)]) 
		  (f 4))))
	     )])
      (display-results correct answers equal?)))

(define (test-simple-defines)
    (let ([correct '(
		     8
		     13
		     (12 14)
		     32
		     )]
          [answers 
            (list 
	     (eval-one-exp ' (begin (define a 5) (+ a 3)))
	     (eval-one-exp ' (begin (define c 5) 
				    (define d (+ c 2)) 
				    (+ d (add1 c))))
	     (eval-one-exp ' 
	      (begin 
		(define e 5) 
		(let ([f (+ e 2)]) 
		  (set! e (+ e f)) 
		  (set! f (* 2 f)) 
		  (list e f))))
	     (eval-one-exp ' 
	      (begin (define ff 
		       (letrec ([ff (lambda (x) 
				      (if (= x 1) 
					  2 
					  (+ (* 2 x) 
					     (ff (- x 2)))))]) 
			 ff)) 
		     (ff 7)))
	     )])
      (display-results correct answers equal?)))

(define (test-letrec-and-define)
    (let ([correct '(
		     55
		     773
		     )]
          [answers 
            (list 
	     (begin (reset-global-env) 
		    (eval-one-exp ' 
		     (letrec ([f (lambda (n) 
				   (if (= n 0) 
				       0 
				       (+ n 
					  (f (sub1 n)))))]) 
		       (f 10))))
	     (eval-one-exp ' 
	      (letrec ([f (lambda (n) 
			    (if (zero? n) 
				0 
				(+ 4 (g (sub1 n)))))] 
		       [g (lambda (n) 
			    (if (zero? n) 
				0 
				(+ 3 (f (sub1 n)))))]) 
		(g (f (g (f 5))))))
	     )])
      (display-results correct answers equal?)))

(define (test-named-let-and-define)
    (let ([correct '(
		     120
		     120
		     (8 1 2 3 4 5 6 7)
		     987
		     16
		     (5 () (((4))) (3 2) 1)
		     )]
          [answers 
            (list 
	     (eval-one-exp ' 
	      (begin 
		(define fact 
		  (lambda (n) 
		    (let loop ((n n) (m 1)) 
		      (if (= n 0) 
			  m 
			  (loop (- n 1) (* m n)))))) 
		(fact 5)))
	     (eval-one-exp ' 
	      (let fact ((n 5) (m 1)) 
		(if (= n 0) 
		    m 
		    (fact (- n 1) (* m n)))))
	     (begin (reset-global-env) 
		    (eval-one-exp '
		     (define rotate-linear 
		       (letrec ([reverse 
				 (lambda (lyst revlist) 
				   (if (null? lyst) 
				       revlist 
				       (reverse (cdr lyst) 
						(cons (car lyst) revlist))))]) 
			 (lambda (los) 
			   (let loop ([los los] [sofar '()]) 
			     (cond [(null? los) los] 
				   [(null? (cdr los)) 
				    (cons (car los) (reverse sofar '()))] 
				   [else (loop (cdr los) (cons (car los) sofar))])))))) 
		    (eval-one-exp '(rotate-linear '(1 2 3 4 5 6 7 8))))
	     (begin (reset-global-env) 
		    (eval-one-exp '
		     (define fib-memo 
		       (let ([max 2] [sofar '((1 . 1) (0 . 1))]) 
			 (lambda (n) 
			   (if (< n max) 
			       (cdr (assq n sofar)) 
			       (let* ([v1 (fib-memo (- n 1))] 
				      [v2 (fib-memo (- n 2))] 
				      [v3 (+ v2 v1)]) 
				 (set! max (+ n 1)) 
				 (set! sofar (cons (cons n v3) sofar)) v3)))))) 
		    (eval-one-exp '(fib-memo 15)))
	     (begin (reset-global-env) 
		    (eval-one-exp '
		     (define f1 (lambda (x) 
				  (f2 (+ x 1))))) 
		    (eval-one-exp '
		     (define f2 (lambda (x) (* x x)))) 
		    (eval-one-exp '(f1 3)))
	    (begin 
	      (reset-global-env) 
	      (eval-one-exp '
	       (define ns-list-recur 
		 (lambda (seed item-proc list-proc) 
		   (letrec ([helper (lambda (ls) 
				      (if (null? ls) 
					  seed 
					  (let ([c (car ls)]) 
					    (if (or (pair? c) 
						    (null? c)) 
						(list-proc (helper c) 
							   (helper (cdr ls))) 
						(item-proc c (helper (cdr ls)))))))]) 
		     helper)))) 
	      (eval-one-exp '
	       (define append 
		 (lambda (s t) 
		   (if (null? s) 
		       t 
		       (cons (car s) 
			     (append (cdr s) t)))))) 
	      (eval-one-exp '
	       (define reverse* 
		 (let ([snoc (lambda (x y) 
			       (append y (list x)))]) 
		   (ns-list-recur '() snoc snoc)))) 
	      (eval-one-exp '(reverse* '(1 (2 3) (((4))) () 5)))))])
      (display-results correct answers equal?)))

(define (test-set!-global-variables)
    (let ([correct '(
		     7
		     4
		     120
		     9
		     )]
          [answers 
            (list 
	     (begin (reset-global-env) 
		    (eval-one-exp '(define a 3)) 
		    (eval-one-exp '(set! a 7)) 
		    (eval-one-exp 'a))
	     (begin (reset-global-env) 
		    (eval-one-exp '(define a 3)) 
		    (eval-one-exp '(define f '())) 
		    (eval-one-exp '(set! f (lambda (x) (+ x 1)))) 
		    (eval-one-exp '(f a)))
	     (begin (reset-global-env) 
		    (eval-one-exp '(define a 5)) 
		    (eval-one-exp '(define f '())) 
		    (eval-one-exp '(set! f (lambda (x) 
					     (if (= x 0) 
						 1 
						 (* x (f (- x 1))))))) 
		    (eval-one-exp '(f a)))
	     (begin (reset-global-env) 
		    (eval-one-exp '(define a 5)) 
		    (eval-one-exp '(let ([b 7]) (set! a 9))) 
		    (eval-one-exp 'a))
	     )])
      (display-results correct answers equal?)))


(define (test-order-matters!)
    (let ([correct '(
		     (30 (29 27 24 20 15 9 2 3) 0)
		     55
		     )]
          [answers 
            (list 
      (eval-one-exp ' 
       (let ([r 2] [ls '(3)] [count 7]) 
	 (let loop () 
	   (if (> count 0) 
	       (begin (set! ls (cons r ls)) 
		      (set! r (+ r count)) 
		      (set! count (- count 1)) (loop)) )) 
	 (list r ls count)))
      (eval-one-exp ' 
       (begin 
	 (define latest 1) 
	 (define total 1) 
	 (or (begin 
	       (set! latest (+ latest 1))		;l = 2
	       (set! total (+ total latest))	;t = 3
	       (> total 50)) 
	     (begin (set! latest (+ latest 1))	;l = 3
		    (set! total (+ total latest)) 	;t = 6
		    (> total 50)) 
	     (begin (set! latest (+ latest 1)) 	;l = 4
		    (set! total (+ total latest))	;t = 10
		    (> total 50)) 
	     (begin (set! latest (+ latest 1))	;l = 5
		    (set! total (+ total latest))	;t = 15
		    (> total 50)) 
	     (begin (set! latest (+ latest 1))	;l = 6
		    (set! total (+ total latest))	;t = 21
		    (> total 50)) 
	     (begin (set! latest (+ latest 1))	;l = 7
		    (set! total (+ total latest))	;t = 28
		    (> total 50)) 
	     (begin (set! latest (+ latest 1))	;l = 8
		    (set! total (+ total latest))	;t = 36
		    (> total 50)) 
	     (begin (set! latest (+ latest 1))	;l = 9
		    (set! total (+ total latest))	;t = 45
		    (> total 50)) 
	     (begin (set! latest (+ latest 1))	;l = 10
		    (set! total (+ total latest))	;t = 55
			(> total 50)) 
	     (begin (set! latest (+ latest 1))	;l = 11
		    (set! total (+ total latest))	;t = 66
		    (> total 50)))
	total))
	     )])
      (display-results correct answers equal?)))

(define (test-misc)
    (let ([correct '(
		     3
		     (5 7)
		     )]
          [answers 
            (list 
	     (eval-one-exp '(apply apply (list + '(1 2))))
	     (eval-one-exp '(apply map (list (lambda (x) (+ x 3)) '(2 4))))
	     )])
      (display-results correct answers equal?)))

(define (test-ref)
    (let ([correct '(
		     (4 3)
		     (4 4)
		     (1 2 3)
		     ((1 2 3)(b b b))
		     )]
          [answers 
            (list 
	     (eval-one-exp ' 
	      (let ([a 3] 
		    [b 4] 
		    [swap! (lambda ((ref x) (ref y)) 
			     (let ([temp x]) 
			       (set! x y) 
			       (set! y temp)))]) 
		(swap! a b) 
		(list a b)))
	     (eval-one-exp ' 
	      (let ([a 3] 
		    [b 4] 
		    [swap (lambda ((ref x) y) 
			    (let ([temp x]) 
			      (set! x y) 
			      (set! y temp)))]) 
		(swap a b) 
		(list a b)))
	     (begin (reset-global-env) 
		    (eval-one-exp '
		     (let* ([a '(1 2 3)] 
			    [b ((lambda ((ref x)) x) a)]) 
		       (set! b 'foo) a)))
	     (begin (reset-global-env) 
		    (eval-one-exp ' (define x '(a a a))) 
		    (eval-one-exp '(define y '(b b b))) 
		    (eval-one-exp '(let () 
				     ((lambda ((ref x) y) 
					(set! x '(1 2 3)) 
					(set! y '(4 5 6))) 
				      x y) 
				     (list x y))))
	     )])
      (display-results correct answers equal?)))



;-----------------------------------------------

(define display-results
  (lambda (correct results test-procedure?)
     (display ": ")
     (pretty-print 
      (if (andmap test-procedure? correct results)
          'All-correct
          `(correct: ,correct yours: ,results)))))


(define sequal?-grading
  (lambda (l1 l2)
    (cond
     ((null? l1) (null? l2))
     ((null? l2) (null? l1))
     ((or (not (set?-grading l1))
          (not (set?-grading l2)))
      #f)
     ((member (car l1) l2) (sequal?-grading
                            (cdr l1)
                            (rember-grading
                             (car l1)
                             l2)))
     (else #f))))

(define set?-grading
  (lambda (s)
    (cond [(null? s) #t]
          [(not (list? s)) #f]
          [(member (car s) (cdr s)) #f]
          [else (set?-grading (cdr s))])))

(define rember-grading
  (lambda (a ls)
    (cond
     ((null? ls) ls)
     ((equal? a (car ls)) (cdr ls))
     (else (cons (car ls) (rember-grading a (cdr ls)))))))

(define set-equals? sequal?-grading)

(define find-edges  ; e know that this node is in the graph before we do the call
  (lambda (graph node)
    (let loop ([graph graph])
      (if (eq? (caar graph) node)
	  (cadar graph)
	  (loop (cdr graph))))))

;; Problem 8  graph?
(define set?  ;; Is this list a set?  If not, it is not a graph.
  (lambda (list)
    (if (null? list) ;; it's an empty set.
	#t
	(if (member (car list) (cdr list))
	    #f
	    (set? (cdr list))))))


(define graph?
  (lambda (obj)
    (and (list? obj)
	 (let ([syms (map car obj)])
	   (and (set? syms)
		(andmap symbol? syms)
		(andmap (lambda (x)
			  (andmap (lambda (y) (member y (remove (car x) syms)))
				  (cadr x)))
			obj))))))
    
(define graph-equal?
  (lambda (a b)
    (and
     (graph? a) 
     (graph? b)
     (let ([a-nodes (map car a)]
	   [b-nodes (map car b)])
       (and 
	(set-equals? a-nodes b-nodes)
	    ; Now  See if the edges from each node are equivalent in the two graphs.
	(let loop ([a-nodes a-nodes])
	  (if (null? a-nodes)
	      #t
	      (let ([a-edges (find-edges a (car a-nodes))]
		    [b-edges (find-edges b (car a-nodes))])
		(and (set-equals? a-edges b-edges)
		     (loop (cdr a-nodes)))))))))))

(define (test-graph-equal)
  (list
   (graph-equal? '((a (b)) (b (a))) '((b (a)) (a (b))))
   (graph-equal? '((a (b c d)) (b (a c d)) (c (a b d)) (d (a b c)))
		 '((b (a c d)) (c (a b d)) (a (b d c)) (d (b a c))))
   (graph-equal? '((a ())) '((a ())))
   (graph-equal? '((a (b c)) (b (a c)) (c (a b))) '((a (b c)) (b (a c)) (c (a b))))
   (graph-equal? '() '())
   ))



(define g test-graph-equal)
	   
	  
     



;You can run the tests individually, or run them all
;#by loading this file (and your solution) and typing (r)

(define (run-all)
(begin
  (display 'set!-local-variables) 
  (test-set!-local-variables)
  (display 'simple-defines) 
  (test-simple-defines)    
  (display 'letrec-and-define) 
  (test-letrec-and-define)    
  (display 'named-let-and-define) 
  (test-named-let-and-define)
  (display 'set!-global-variables) 
  (test-set!-global-variables)
  (display 'order-matters!) 
  (test-order-matters!)
  (display 'misc) 
  (test-misc)    
  (display 'ref) 
  (test-ref))
)

(define r run-all)