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a4-student-tests.rkt
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a4-student-tests.rkt
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#lang racket
;; Written for Spring 2013 by Andre Kuhlenschmidt and Jason Hemann
#| The underlying principles of the autograding framework is simple.
We use the rackunit unit testing framework that comes with the racket
distrobution. We have define a set of calls that take a test-suite.
and executes the test-suite with eval rebound to a sandboxed evaluator
that provides racket and the file being tested. Disk access should be
limited to those files and time and space are limited by the parameters
time-for-eval and space-for-eval.
|#
(require rackunit rackunit/text-ui racket/sandbox)
(provide test-file)
#|
Test File is the minimum requirement for being able to understand
our the autograder. test-file is a function that when invoked with
no arguments will search will the current directory for the file
named a1.rkt and run the test suite with that file.
If a single argument is provided that argument must be the relative or
absolute path to the file containing the definitions for the assignment.
|#
(define test-file
(lambda (#:file-name (file "./a4.rkt")
#:sec-of-eval (sec 5)
#:mb-of-eval (mb 5))
(parameterize ((read-accept-reader #t)
(read-accept-lang #t))
(let ((sandboxed-eval
(make-module-evaluator (read (open-input-file file))
#:allow-for-require '(C311/pmatch))))
(set-eval-limits sandboxed-eval sec mb)
(parameterize ((current-eval sandboxed-eval)
(error-print-context-length 0))
(run-tests tests))))))
#|
A tests is the name of the test-suite that is run by a call to test-file.
The test suite is a type that is define in the rackunit module. I will give
some examples of how test might be structured. If furthure documentation is
require feel free to browse the rackunit documentation at the following address.
http://docs.racket-lang.org/rackunit/?q=rackunit
|#
(define tests
(test-suite "a4"
(test-suite "value-of/RI-closures/fn-reps"
(test-equal-if-defined value-of-fn
((value-of-fn
'((lambda (x) (if (zero? x)
12
47))
0)
(empty-env))
12)
((value-of-fn
'(let ([y (* 3 4)])
((lambda (x) (* x y)) (sub1 6)))
(empty-env))
60)
((value-of-fn
'(let ([x (* 2 3)])
(let ([y (sub1 x)])
(* x y)))
(empty-env))
30)
((value-of-fn
'(let ([x (* 2 3)])
(let ([x (sub1 x)])
(* x x)))
(empty-env))
25)))
(test-suite "value-of/RI-closures/ds-reps"
(test-equal-if-defined value-of-ds
((value-of-ds
'((lambda (x) (if (zero? x)
12
47))
0)
(empty-env))
12)
((value-of-ds
'(let ([y (* 3 4)])
((lambda (x) (* x y)) (sub1 6)))
(empty-env))
60)
((value-of-ds
'(let ([x (* 2 3)])
(let ([y (sub1 x)])
(* x y)))
(empty-env))
30)
((value-of-ds
'(let ([x (* 2 3)])
(let ([x (sub1 x)])
(* x x)))
(empty-env))
25)))
(test-suite "value-of-scopes"
(test-equal-if-defined value-of-scopes
((value-of-scopes '(let ([x 2])
(let ([f (lambda (e) x)])
(let ([x 5])
(f 0)))) (empty-env))
2)
((value-of-scopes '(let ([x 2])
(let ([f (d-lambda (e) x)])
(let ([x 5])
(f 0)))) (empty-env))
5)
((value-of-scopes
'(let
([l (cons 1 (cons 2 (cons 3 '())))])
((map (lambda (e) (cons e l))) l))
(extend-env
'map
(value-of-scopes
'(let ([map (lambda (map)
(lambda (f)
(lambda (l)
(if (null? l) '()
(cons (f (car l)) (((map map) f) (cdr l)))))))])
(map map)) (empty-env))
(empty-env)))
'((1 1 2 3) (2 1 2 3) (3 1 2 3)))
((value-of-scopes
'(let
([l (cons 1 (cons 2 (cons 3 '())))])
((map (d-lambda (e) (cons e l))) l))
(extend-env
'map
(value-of-scopes
'(let ([map (lambda (map)
(lambda (f)
(lambda (l)
(if (null? l) '()
(cons (f (car l)) (((map map) f) (cdr l)))))))])
(map map)) (empty-env))
(empty-env)))
'((1 1 2 3) (2 2 3) (3 3)))
;; Notice the behavior of let in this next example.
;; we get letrec for free. (This is not a good thing.)
((value-of-scopes
'(let
([map (d-lambda (f)
(d-lambda (l)
(if (null? l) '()
(cons (f (car l)) ((map f) (cdr l))))))])
(let ([f (d-lambda (e) (cons e l))])
((map f) (cons 1 (cons 2 (cons 3 '()))))))
(empty-env))
'((1 1 2 3) (2 2 3) (3 3)))))
(test-suite "value-of-ri"
(test-equal-if-defined "value-of-ri"
(((value-of-ri empty-env-fn extend-env-fn apply-env-fn closure-fn-ri apply-closure-fn-ri) '((lambda (x) x) 5))
5)
(((value-of-ri empty-env-ds extend-env-ds apply-env-ds closure-ds-ri apply-closure-ds-ri) '((lambda (x) x) 5))
5)
(((value-of-ri empty-env-fn extend-env-fn apply-env-fn closure-ds-ri apply-closure-ds-ri) '((lambda (x) x) 5))
5)
(((value-of-ri empty-env-ds extend-env-ds apply-env-ds closure-fn-ri apply-closure-fn-ri) '((lambda (x) x) 5))
5)))))
(define-syntax test-if-defined
(syntax-rules ()
((_ sym tests ...)
(test-case (format "~a undefined" 'sym)
(check-not-false (lambda () (eval 'sym)))
tests ...))))
(define-syntax test-equal-if-defined
(syntax-rules ()
((_ ident (expr val) ...)
(let ((n 1))
(test-case (format "~a: undefined" 'ident)
(check-not-exn (lambda () (eval 'ident)))
(test-case (format "~a: ~a" 'ident n)
(with-check-info
(('tested 'expr))
(set! n (add1 n))
(check equal? (eval 'expr) val))) ...)))))
(define-syntax ifdef-suite
(syntax-rules ()
((_ ident (expr val) ...)
(let ((n 1))
(test-suite (~a 'ident)
(test-case "undefined"
(check-not-exn (lambda () (eval 'ident)))
(test-case (~a n)
(with-check-info (('tested 'expr))
(set! n (add1 n))
(check equal? (eval 'expr) val))) ...))))))