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russHyde/jest_runners.sh

Last active May 27, 2022 14:15
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Notes on puppeteer / jest tests
Raw
jest_runners.sh
# Run the test file multiple times, break when it fails to pass
TEST_PATTERN="xxx"
for i in {1..10}; do
npx jest ${TEST_PATTERN} --silent --runInBand;
if [[ "$?" != 0 ]]; then echo "Failed after $i attempts" && break; fi;
done
Raw
test_helpers.js
/**
* Wait for an event to be signalled to the browser by the (shiny) app
*
* Useful events:
* - "shiny:idle" - indicates that the server is idle
* - "shiny:visualchange" - indicates that an output is resized / hidden / shown
*
* Source: https://github.com/puppeteer/puppeteer/issues/2455
*
* @param {Page} page
* @param {string} event
* @param {number} timeout
*/
async function waitForEvent(page, event, timeout = 5000) {
return Promise.race([
page.evaluate(
(event) =>
new Promise((resolve) =>
document.addEventListener(event, resolve, { once: true })
),
event
),
page.waitForTimeout(timeout),
]);
}
@russHyde
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russHyde commented May 27, 2022 •
edited
Loading

FIrst block from https://stackoverflow.com/a/55937841/1845650

Unfortunately the implementation from that SO post fails:

TEST_PATTERN="xxx"
for i in {1..10}; do npx jest ${TEST_PATTERN} --silent || (echo 'Failed after $i attempts' && break); done
... snip ...
Failed after $i attempts
bash: break: only meaningful in a `for', `while', or `until' loop

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