37 lines
1.4 KiB
Racket
37 lines
1.4 KiB
Racket
;;; SPDX-License-Identifier: LGPL-3.0-or-later
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;;; SPDX-FileCopyrightText: Copyright © 2010-2021 Tony Garnock-Jones <tonyg@leastfixedpoint.com>
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#lang syndicate/test-implementation
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;; See .../syndicate/examples/actor/example-responsibility-transfer-1.rkt
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(test-case
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[(spawn #:name 'demand-watcher
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(during/spawn 'demand
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#:name (gensym 'intermediate-demand-asserter)
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(assert 'intermediate-demand)))
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(spawn #:name 'intermediate-demand-watcher
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(during/spawn 'intermediate-demand
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#:name (gensym 'supply-asserter)
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(assert 'supply)))
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(spawn* #:name 'driver
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(react (on (asserted 'supply) (displayln "Supply asserted."))
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(on (retracted 'supply) (displayln "Supply retracted.")))
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(until (asserted (observe 'demand)))
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(displayln "Asserting demand.")
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(assert! 'demand)
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(until (asserted 'supply))
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(displayln "Glitching demand.")
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(retract! 'demand)
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(flush!)
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(assert! 'demand)
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(displayln "Demand now steady."))]
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no-crashes
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(expected-output (list "Asserting demand."
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"Supply asserted."
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"Glitching demand."
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"Demand now steady."
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"Supply retracted."
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"Supply asserted.")))
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