Help creating a heap event with a different id and react numbers

I have a button with no proper ID and I was wondering if I could this data-testid tag.

<button data-testid="copyShareLinkBtn_15106950" >Share</button>

The number is auto-generated with react so I want to use a wildcard.

I’ve tried this but it’s not working. 

[data-testid^=copyShareLinkBtn_]

Any help would be greatly appreciated. Thanks