7491e172ea
The eopl language is now racket-based rather than mzscheme-based. This test-suite, which was originally distributed on the book's web-site has been re-written in the new language. Changes include dropping all drscheme-init.scm and top.scm files. Remaining files were renamed to use the .rkt extension and edited to use the #lang syntax (instead of modulue). Require and provide forms were changed to reflect racket's syntax instead of mzscheme's (eg, only-in vs. only). Several occurrences of one-armed ifs were changed to use when and unless. All tests have been run successfully.
129 lines
3.7 KiB
Racket
Executable File
129 lines
3.7 KiB
Racket
Executable File
#lang eopl
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(require tests/eopl/private/utils)
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(require "data-structures.rkt") ; for expval constructors
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(require "lang.rkt") ; for scan&parse
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(require "interp.rkt") ; for value-of-program
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;; run : String -> ExpVal
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(define run
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(lambda (string)
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(value-of-program (scan&parse string))))
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(define equal-answer?
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(lambda (ans correct-ans)
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(equal? ans (sloppy->expval correct-ans))))
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(define sloppy->expval
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(lambda (sloppy-val)
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(cond
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((number? sloppy-val) (num-val sloppy-val))
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((boolean? sloppy-val) (bool-val sloppy-val))
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(else
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(eopl:error 'sloppy->expval
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"Can't convert sloppy value to expval: ~s"
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sloppy-val)))))
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(define-syntax-rule (check-run (name str res) ...)
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(begin
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(cond [(eqv? 'res 'error)
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(check-exn always? (lambda () (run str)))]
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[else
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(check equal-answer? (run str) 'res (symbol->string 'name))])
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...))
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;;;;;;;;;;;;;;;; tests ;;;;;;;;;;;;;;;;
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(check-run
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;; simple arithmetic
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(positive-const "11" 11)
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(negative-const "-33" -33)
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(simple-arith-1 "-(44,33)" 11)
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;; nested arithmetic
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(nested-arith-left "-(-(44,33),22)" -11)
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(nested-arith-right "-(55, -(22,11))" 44)
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;; simple variables
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(test-var-1 "x" 10)
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(test-var-2 "-(x,1)" 9)
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(test-var-3 "-(1,x)" -9)
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;; simple unbound variables
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(test-unbound-var-1 "foo" error)
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(test-unbound-var-2 "-(x,foo)" error)
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;; simple conditionals
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(if-true "if zero?(0) then 3 else 4" 3)
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(if-false "if zero?(1) then 3 else 4" 4)
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;; test dynamic typechecking
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(no-bool-to-diff-1 "-(zero?(0),1)" error)
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(no-bool-to-diff-2 "-(1,zero?(0))" error)
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(no-int-to-if "if 1 then 2 else 3" error)
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;; make sure that the test and both arms get evaluated
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;; properly.
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(if-eval-test-true "if zero?(-(11,11)) then 3 else 4" 3)
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(if-eval-test-false "if zero?(-(11, 12)) then 3 else 4" 4)
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;; and make sure the other arm doesn't get evaluated.
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(if-eval-test-true-2 "if zero?(-(11, 11)) then 3 else foo" 3)
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(if-eval-test-false-2 "if zero?(-(11,12)) then foo else 4" 4)
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;; simple let
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(simple-let-1 "let x = 3 in x" 3)
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;; make sure the body and rhs get evaluated
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(eval-let-body "let x = 3 in -(x,1)" 2)
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(eval-let-rhs "let x = -(4,1) in -(x,1)" 2)
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;; check nested let and shadowing
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(simple-nested-let "let x = 3 in let y = 4 in -(x,y)" -1)
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(check-shadowing-in-body "let x = 3 in let x = 4 in x" 4)
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(check-shadowing-in-rhs "let x = 3 in let x = -(x,1) in x" 2)
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;; simple applications
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(apply-proc-in-rator-pos "(proc(x) -(x,1) 30)" 29)
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(apply-simple-proc "let f = proc (x) -(x,1) in (f 30)" 29)
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(let-to-proc-1 "(proc(f)(f 30) proc(x)-(x,1))" 29)
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(nested-procs "((proc (x) proc (y) -(x,y) 5) 6)" -1)
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(nested-procs2 "let f = proc(x) proc (y) -(x,y) in ((f -(10,5)) 6)"
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-1)
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(y-combinator-1 "
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let fix = proc (f)
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let d = proc (x) proc (z) ((f (x x)) z)
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in proc (n) ((f (d d)) n)
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in let
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t4m = proc (f) proc(x) if zero?(x) then 0 else -((f -(x,1)),-4)
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in let times4 = (fix t4m)
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in (times4 3)" 12)
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;; simple letrecs
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(simple-letrec-1 "letrec f(x) = -(x,1) in (f 33)" 32)
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(simple-letrec-2
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"letrec f(x) = if zero?(x) then 0 else -((f -(x,1)), -2) in (f 4)"
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8)
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(simple-letrec-3
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"let m = -5
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in letrec f(x) = if zero?(x) then 0 else -((f -(x,1)), m) in (f 4)"
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20)
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;; alas, no multiplication in this language. Exercise: define
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;; multiplication as a letrec and then use it to define factorial.
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;; (fact-of-6 "letrec
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;; fact(x) = if zero?(x) then 1 else *(x, (fact sub1(x)))
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;; in (fact 6)"
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;; 720)
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(HO-nested-letrecs
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"letrec even(odd) = proc(x) if zero?(x) then 1 else (odd -(x,1))
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in letrec odd(x) = if zero?(x) then 0 else ((even odd) -(x,1))
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in (odd 13)" 1)
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)
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