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goos-code-examples
Code examples from later chapters of Growing Object-Oriented Software, Guided by Tests
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Some time ago we developed some helpers using the capturing notifications strategy to test asynchronous ClojureScript code that was using core.async channels. Have a look at, for instance, the expect-async-message assertion helper in which we use core.async/alts! and core.async/timeout to implement this behaviour. The core.async/alts! function selects the first channel that responds. If that channel is the one the test code was observing we assert that the received message is what we expected. If the channel that responds first is the one generated by core.async/timeout we fail the test. We mentioned these async-test-tools in previous post: Testing Om components with cljs-react-test.
[3] Have a look at the testing asynchronous systems examples in the GOOS Code examples repository for a more object-oriented implementation of helper for the polling for changes strategy, and also examples of the capturing notifications strategy.