277 lines
12 KiB
Scheme
277 lines
12 KiB
Scheme
(module scheme-tests mzscheme
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(require (lib "teachprims.ss" "lang" "private")
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mred
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framework
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mzlib/pretty
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mzlib/pconvert
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mzlib/class)
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(require "scheme-gui.scm"
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"test-display.scm")
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(require-for-syntax (lib "shared.ss" "stepper" "private"))
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(provide
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check-expect ;; syntax : (check-expect <expression> <expression>)
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check-within ;; syntax : (check-within <expression> <expression> <expression>)
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check-error ;; syntax : (check-error <expression> <expression>)
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)
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(define builder
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(lambda ()
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(let ([te (build-test-engine)])
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(namespace-set-variable-value! 'test~object te (current-namespace))
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te)))
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(define (test)
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(run-tests)
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(display-results))
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(define (test-text)
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(run-tests)
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(print-results))
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(define-syntax (run-tests stx)
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(syntax-case stx ()
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((_)
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(syntax-property
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#'(run (namespace-variable-value 'test~object #f builder (current-namespace)))
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'test-call #t))))
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(define (run test-info) (and test-info (send test-info run)))
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(define-syntax (display-results stx)
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(syntax-case stx ()
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((_)
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(syntax-property
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#'(let ([test-info (namespace-variable-value 'test~object #f builder (current-namespace))])
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(and test-info
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(let ([display-data (scheme-test-data)])
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(send test-info setup-display (car display-data) (cadr display-data))
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(send test-info summarize-results (current-output-port)))))
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'test-call #t))))
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(define-syntax (print-results stx)
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(syntax-case stx ()
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((_)
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(syntax-property
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#'(let ([test-info (namespace-variable-value 'test~object #f builder (current-namespace))])
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(and test-info
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(send test-info refine-display-class test-display-textual%)
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(send test-info summarize-results (current-output-port))))
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'test-call #t))))
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(provide run-tests display-results test test-text)
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(define (build-test-engine)
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(let ([engine (make-object scheme-test%)])
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(send engine setup-info 'check-require)
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engine))
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(define (insert-test test-info test) (send test-info add-test test))
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(define INEXACT-NUMBERS-FMT
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"check-expect cannot compare inexact numbers. Try (check-within test ~a range).")
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(define CHECK-ERROR-STR-FMT
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"check-error requires a string for the second argument, representing the expected error message. Given ~s")
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(define CHECK-WITHIN-INEXACT-FMT
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"check-within requires an inexact number for the range. ~a is not inexact.")
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(define-for-syntax CHECK-EXPECT-STR
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"check-expect requires two expressions. Try (check-expect test expected).")
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(define-for-syntax CHECK-ERROR-STR
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"check-error requires two expressions. Try (check-error test message).")
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(define-for-syntax CHECK-WITHIN-STR
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"check-within requires three expressions. Try (check-within test expected range).")
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(define-for-syntax CHECK-EXPECT-DEFN-STR
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"check-expect cannot be used as an expression")
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(define-for-syntax CHECK-WITHIN-DEFN-STR
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"check-within cannot be used as an expression")
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(define-for-syntax CHECK-ERROR-DEFN-STR
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"check-error cannot be used as an expression")
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(define-struct check-fail (src))
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;(make-unexpected-error src string)
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(define-struct (unexpected-error check-fail) (expected message))
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;(make-unequal src scheme-val scheme-val)
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(define-struct (unequal check-fail) (test actual))
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;(make-outofrange src scheme-val scheme-val inexact)
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(define-struct (outofrange check-fail) (test actual range))
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;(make-incorrect-error src string)
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(define-struct (incorrect-error check-fail) (expected message))
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;(make-expected-error src string scheme-val)
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(define-struct (expected-error check-fail) (message value))
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(define-syntax (check-expect stx)
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(syntax-case stx ()
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((_ test actual)
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(not (eq? (syntax-local-context) 'expression))
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(quasisyntax/loc stx
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(define #,(gensym 'test)
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#,(stepper-syntax-property
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#`(let ([test-info (namespace-variable-value 'test~object #f builder (current-namespace))])
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(when test-info
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(insert-test test-info
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(lambda ()
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(check-values-expected
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(lambda () test)
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actual
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(list #,@(list #`(quote #,(syntax-source stx))
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(syntax-line stx)
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(syntax-column stx)
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(syntax-position stx)
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(syntax-span stx)))
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test-info)))))
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`stepper-hint
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`comes-from-check-expect))))
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((_ test)
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(not (eq? (syntax-local-context) 'expression))
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(raise-syntax-error 'check-expect CHECK-EXPECT-STR stx))
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((_ test actual extra ...)
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(not (eq? (syntax-local-context) 'expression))
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(raise-syntax-error 'check-expect CHECK-EXPECT-STR stx))
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((_ test ...)
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(eq? (syntax-local-context) 'expression)
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(raise-syntax-error 'check-expect CHECK-EXPECT-DEFN-STR stx))))
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;check-values-expected: (-> scheme-val) scheme-val src -> void
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(define (check-values-expected test actual src test-info)
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(error-check (lambda (v) (if (number? v) (exact? v) #t))
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actual INEXACT-NUMBERS-FMT)
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(send (send test-info get-info) add-check)
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(run-and-check (lambda (v1 v2 _) (beginner-equal? v1 v2))
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(lambda (src v1 v2 _) (make-unequal src v1 v2))
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test actual #f src test-info))
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(define-syntax (check-within stx)
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(syntax-case stx ()
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((_ test actual within)
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(not (eq? (syntax-local-context) 'expression))
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(quasisyntax/loc stx
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(define #,(gensym 'test-within)
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(let ([test-info (namespace-variable-value 'test~object #f builder (current-namespace))])
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(when test-info
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(insert test-info
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(lambda ()
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(check-values-within (lambda () test) actual within
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(list #,@(list (syntax-source stx)
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(syntax-line stx)
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(syntax-column stx)
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(syntax-position stx)
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(syntax-span stx)))
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test-info))))))))
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((_ test actual)
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(not (eq? (syntax-local-context) 'expression))
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(raise-syntax-error 'check-within CHECK-WITHIN-STR stx))
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((_ test)
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(not (eq? (syntax-local-context) 'expression))
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(raise-syntax-error 'check-within CHECK-WITHIN-STR stx))
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((_ test actual within extra ...)
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(not (eq? (syntax-local-context) 'expression))
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(raise-syntax-error 'check-within CHECK-WITHIN-STR stx))
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((_ test ...)
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(eq? (syntax-local-context) 'expression)
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(raise-syntax-error 'check-within CHECK-WITHIN-DEFN-STR stx))))
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(define (check-values-within test actual within src test-info)
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(error-check number? within CHECK-WITHIN-INEXACT-FMT)
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(send (send test-info get-info) add-check)
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(run-and-check beginner-equal~? make-outofrange test actual within src test-info))
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(define-syntax (check-error stx)
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(syntax-case stx ()
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((_ test error)
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(not (eq? (syntax-local-context) 'expression))
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(quasisyntax/loc stx
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(define #,(gensym 'test-error)
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(let ([test-info (namespace-variable-value 'test~object #f builder (current-namespace))])
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(when test-info
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(insert-test test-info
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(lambda ()
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(check-values-error (lambda () test) error (list #,@(list (syntax-source stx)
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(syntax-line stx)
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(syntax-column stx)
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(syntax-position stx)
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(syntax-span stx)))
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test-info))))))))
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((_ test)
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(not (eq? (syntax-local-context) 'expression))
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(raise-syntax-error 'check-error CHECK-ERROR-STR stx))
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((_ test ...)
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(eq? (syntax-local-context) 'expression)
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(raise-syntax-error 'check-error CHECK-ERROR-DEFN-STR stx))))
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(define (check-values-error test error src test-info)
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(error-check string? error CHECK-ERROR-STR-FMT)
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(send (send test-info get-info) add-check)
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(let ([result (with-handlers ((exn?
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(lambda (e)
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(or (equal? (exn-message e) error)
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(make-incorrect-error src error (exn-message e))))))
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(let ([test-val (test)])
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(make-expected-error src error test-val)))])
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(when (check-fail? result)
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(send (send test-info get-info) check-failed (check->message result) (check-fail-src result)))))
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(define (error-check pred? actual fmt)
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(unless (pred? actual)
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(raise (make-exn:fail:contract (format fmt actual)
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(current-continuation-marks)))))
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;run-and-check: (scheme-val scheme-val scheme-val -> boolean)
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; (scheme-val scheme-val scheme-val -> check-fail)
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; ( -> scheme-val) scheme-val scheme-val object -> void
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(define (run-and-check check maker test expect range src test-info)
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(let ([result
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(with-handlers ((exn? (lambda (e) (make-unexpected-error src expect (exn-message e)))))
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(let ([test-val (test)])
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(or (check test-val expect range)
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(maker src test-val expect range))))])
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(when (check-fail? result)
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(send (send test-info get-info) check-failed (check->message result) (check-fail-src result)))))
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(define (check->message fail)
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(cond
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[(unexpected-error? fail)
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(list "check encountered the following error instead of the expected value, "
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(format-value (unexpected-error-expected fail))
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(format ". ~n :: ~a~n" (unexpected-error-message fail)))]
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[(unequal? fail)
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(list "Actual value "
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(format-value (unequal-test fail))
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" differs from "
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(format-value (unequal-actual fail))
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", the expected value.\n")]
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[(outofrange? fail)
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(list "Actual value "
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(format-value (outofrange-test fail))
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(format " is not within ~v of expected value " (outofrange-range fail))
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(format-value (outofrange-actual fail))
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".\n")]
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[(incorrect-error? fail)
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(list (format "check-error encountered the following error instead of the expected ~a~n :: ~a ~n"
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(incorrect-error-expected fail) (incorrect-error-message fail)))]
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[(expected-error? fail)
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(list "check-error expected the following error, but instead received the value "
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(format-value (expected-error-value fail))
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(format ".~n ~a~n" (expected-error-message fail)))]))
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(define (format-value value)
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(cond
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[(is-a? value snip%) value]
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[(or (pair? value) (struct? value))
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(parameterize ([constructor-style-printing #t]
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[pretty-print-columns 40])
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(let* ([text* (new (editor:standard-style-list-mixin text%))]
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[text-snip (new editor-snip% [editor text*])])
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(pretty-print (print-convert value) (open-output-text-editor text*))
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(send text* lock #t)
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text-snip))]
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[else (format "~v" value)]))
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)
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