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beautiful-racket/beautiful-racket-ragg/br/ragg/test/test-lexer.rkt

59 lines
1.3 KiB
Racket

#lang racket/base
(require br/ragg/rules/lexer
rackunit
parser-tools/lex)
(define (l s)
(define t (lex/1 (open-input-string s)))
(list (token-name (position-token-token t))
(token-value (position-token-token t))
(position-offset (position-token-start-pos t))
(position-offset (position-token-end-pos t))))
;; WARNING: the offsets are not in terms of file positions. So they
;; start counting at 1, not 0.
(check-equal? (l " hi")
'(ID "hi" 2 4))
(check-equal? (l " hi")
'(ID "hi" 3 5))
(check-equal? (l "hi")
'(ID "hi" 1 3))
(check-equal? (l "# foobar\nhi")
'(ID "hi" 10 12))
(check-equal? (l "# foobar\rhi")
'(ID "hi" 10 12))
(check-equal? (l "# foobar\r\nhi")
'(ID "hi" 11 13))
(check-equal? (l "hi:")
'(RULE_HEAD "hi:" 1 4))
(check-equal? (l "hi :")
'(RULE_HEAD "hi :" 1 7))
(check-equal? (l "|")
'(PIPE "|" 1 2))
(check-equal? (l "(")
'(LPAREN "(" 1 2))
(check-equal? (l "[")
'(LBRACKET "[" 1 2))
(check-equal? (l ")")
'(RPAREN ")" 1 2))
(check-equal? (l "]")
'(RBRACKET "]" 1 2))
(check-equal? (l "'hello'")
'(LIT "'hello'" 1 8))
(check-equal? (l "'he\\'llo'")
'(LIT "'he\\'llo'" 1 10))