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#lang racket/base
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(require "../predicates.rkt" racket/list sugar)
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(module+ test (require rackunit))
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(module+ test
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(check-true (meta-xexpr? '(meta "key" "value")))
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(check-false (meta-xexpr? '(meta "key" "value" "foo")))
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(check-false (meta-xexpr? '(meta))))
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(module+ test
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(check-true (block-xexpr? '(p "foo")))
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(check-true (block-xexpr? '(div "foo")))
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(check-false (block-xexpr? '(em "foo")))
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(check-false (block-xexpr? '(barfoo "foo"))))
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(module+ test
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(check-equal? (hash-ref (count-incidence '(a b c d b c)) 'b) 2)
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(check-equal? (hash-ref (count-incidence '(a b c d b c)) 'a) 1))
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(module+ test
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(check-true (members-unique? '(1 2 3)))
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(check-false (members-unique? '(1 2 2)))
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(check-true (members-unique? (->vector '(1 2 3))))
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(check-false (members-unique? (->vector '(1 2 2))))
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(check-true (members-unique? "fob"))
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(check-false (members-unique? "foo")))
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(module+ test
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(check-true (whitespace? " "))
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(check-false (whitespace? "foo"))
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(check-false (whitespace? 'foo))
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(check-false (whitespace? #\Ø))
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(check-false (whitespace? " ")) ; a nonbreaking space. todo: why is this so?
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(check-true (whitespace? "\n \n"))
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(check-true (whitespace? (list "\n" " " "\n")))
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(check-true (whitespace? (list "\n" " " "\n" (list "\n" "\n")))))
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