30 lines
1.2 KiB
Racket
30 lines
1.2 KiB
Racket
#lang syndicate/test-implementation
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;; Box-and-client
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(test-case
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[(message-struct set-box (new-value))
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(assertion-struct box-state (value))
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(spawn (field [current-value 0])
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(assert (box-state (current-value)))
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(stop-when-true (= (current-value) 3)
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(displayln "box: terminating"))
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(on (message (set-box $new-value))
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(printf "box: taking on new-value ~v\n" new-value)
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(current-value new-value)))
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(spawn (stop-when (retracted (observe (set-box _)))
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(displayln "client: box has gone"))
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(on (asserted (box-state $v))
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(printf "client: learned that box's value is now ~v\n" v)
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(send! (set-box (+ v 1)))))]
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no-crashes
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(expected-output (list "client: learned that box's value is now 0"
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"box: taking on new-value 1"
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"client: learned that box's value is now 1"
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"box: taking on new-value 2"
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"client: learned that box's value is now 2"
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"box: taking on new-value 3"
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"box: terminating"
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"client: box has gone")))
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