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(((vcomponent control) with-replaced-properties)
((vcomponent) parse-calendar)
((vcomponent base) prop))
(define ev (call-with-input-string
"BEGIN:DUMMY
KEY:value
END:DUMMY"
parse-calendar))
;; Test that temoraries are set and restored
(test-equal "value" (prop ev 'KEY))
(with-replaced-properties (ev (KEY "other"))
(test-equal "other" (prop ev 'KEY)))
(test-equal "value" (prop ev 'KEY))
;; Test that they are restored on non-local exit
(catch #t
(lambda ()
(with-replaced-properties (ev (KEY "other"))
(throw 'any)))
(lambda _
(test-equal "value" (prop ev 'KEY))))
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