React-native-testing-library: Any way of triggering the onValueChange event of a Picker element?

[reaktivo]

Describe the Feature

Not a feature request per se. Just wanted to ask if there's a recommended way of calling the onValueChange event on the Picker element

[thymikee]

Hey! There's no recommended way. You should be good using something like:

fireEvent(pickerItem, 'onValueChange', {someData})

[sammysium]

Describe the Feature

Not a feature request per se. Just wanted to ask if there's a recommended way of calling the onValueChange event on the Picker element

Ever solved that? I get TypeError: Cannot read property 'charAt' of undefined when I do fireEvent(pickerItem, 'onValueChange', {someData})

[lukewlms]

So far we're just mocking the Picker component with a TextInput, but it's messy. I have to translate the onChange call to pass an index into the callback. Would be great to know if someone has a specific example of selecting the Picker control and calling fireEvent to manipulate it.

[sammysium]

I think I have got it to work. I will check and update you.

On Fri, Sep 11, 2020, 5:11 PM Luke Williams [e-mail]
wrote:

So far we're just mocking the Picker component with a TextInput, but it's
messy. I have to translate the onChange call to pass an index into the
callback. Would be great to know if someone has a specific example of
selecting the Picker control and calling fireEvent to manipulate it.

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