How to test `propsChanged` ?

[Paolo D'Amico]

Would be great if we could document how to properly test the effects of propsChanged.

Conceptual example (code does not work like this):

let logic = myLogic({
    foo: 'bar',
})
logic.mount()
await expectLogic(logic).toFinishAllListeners().toMatchValues({ isFooBar: true })

logic = myLogic({
    foo: 'baz',
})
await expectLogic(logic).toFinishAllListeners().toMatchValues({ isFooBar: false })

[Marius Andra]

Hey @paolodamico, I made a test like this... and it passes. 🤔

What could be happening in your case could perhaps be:

• you matched some actions earlier, and now the values are stuck at the state right after the action. Try .clearHistory()
• there is a 0ms timeout before propsChanged is triggered. Perhaps that's not enough? Try a .delay(1), or then waiting for the @KEA/FLUSH action that gets triggered after props change

Can you help tweak the test case until it fails?

Apologies for the lag in the response 😅 ... how are things? :D