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brag/parser-tools/private-lex/error-tests.rkt

83 lines
3.8 KiB
Racket

#lang racket/base
(module+ test
(require (for-syntax racket/base) ; keep: convert-compile-time-error is hiding usages
yaragg/parser-tools/lex ; keep: convert-compile-time-error is hiding usages
rackunit
syntax/macro-testing)
(check-exn #rx"lex-abbrev" (λ () (convert-compile-time-error (define-lex-abbrev))))
(check-exn #rx"lex-abbrev" (λ () (convert-compile-time-error (define-lex-abbrev a))))
(check-exn #rx"lex-abbrev" (λ () (convert-compile-time-error (define-lex-abbrev (a b) v))))
(check-exn #rx"lex-abbrev" (λ () (convert-compile-time-error (define-lex-abbrev 1 1))))
(check-exn #rx"lex-abbrevs" (λ () (convert-compile-time-error (define-lex-abbrevs ()))))
(check-exn #rx"lex-trans" (λ () (convert-compile-time-error (define-lex-trans))))
(check-exn #rx"lexer" (λ () (convert-compile-time-error (lexer))))
(check-exn #rx"lexer" (λ () (convert-compile-time-error (lexer ("a" "b" "c")))))
(check-exn #rx"lexer" (λ () (convert-compile-time-error (lexer ()))))
(check-exn #rx"lexer" (λ () (convert-compile-time-error (lexer ("")))))
(check-exn #rx"regular-expression" (λ () (convert-compile-time-error (lexer (a 1)))))
(check-exn #rx"regular-expression" (λ () (convert-compile-time-error (lexer ((a) 1)))))
(check-exn #rx"regular-expression"
(λ () (convert-compile-time-error (let ((a 1)) (lexer ((a) 1))))))
(check-exn #rx"regular-expression"
(λ () (convert-compile-time-error (let-syntax ((a 1)) (lexer ((a) 1))))))
(check-exn #rx"define-lex-trans"
(λ ()
(convert-compile-time-error
(let ()
(define-lex-trans a 1)
(let ()
(lexer ((a) 1)))))))
;; Detecting mutual recursion cycle:
(check-exn #rx"regular-expression"
(λ ()
(convert-compile-time-error
(let ()
(define-lex-abbrev a b)
(define-lex-abbrev b a)
(let ()
(lexer (a 1)))))))
(check-exn #rx"regular-expression"
(λ ()
(convert-compile-time-error
(let ()
(define-lex-abbrev a (repetition 0 1 b))
(define-lex-abbrev b (repetition 0 1 a))
(let ()
(lexer (a 1)))))))
;; Detecting cycle within same abbreviation:
(check-exn #rx"regular-expression"
(λ ()
(convert-compile-time-error
(let ()
(define-lex-abbrev balanced
(union (concatenation "(" balanced ")" balanced)
any-char))
(lexer
[balanced (string-append lexeme (balanced input-port))]
[(eof) ""])))))
(check-exn #rx"regular-expression" (λ () (convert-compile-time-error (lexer (1 1)))))
(check-exn #rx"repetition" (λ () (convert-compile-time-error (lexer ((repetition) 1)))))
(check-exn #rx"repetition" (λ () (convert-compile-time-error (lexer ((repetition #\1 #\1 "3") 1)))))
(check-exn #rx"repetition" (λ () (convert-compile-time-error (lexer ((repetition 1 #\1 "3") 1)))))
(check-exn #rx"repetition" (λ () (convert-compile-time-error (lexer ((repetition 1 0 "3") 1)))))
(check-exn #rx"complement" (λ () (convert-compile-time-error (lexer ((complement) 1)))))
(check-exn #rx"char-range" (λ () (convert-compile-time-error (lexer ((char-range) 1)))))
(check-exn #rx"char-range" (λ () (convert-compile-time-error (lexer ((char-range #\9 #\0) 1)))))
(check-exn #rx"char-complement" (λ () (convert-compile-time-error (lexer ((char-complement) 1)))))
(check-exn #rx"char-complement"
(λ ()
(convert-compile-time-error (lexer ((char-complement (concatenation "1" "2")) 1))))))