For testing purposes in an app we use `semantics` ...

# compose

[Tom Truyen]

For testing purposes in an app we use semantics on our Composables . Now for a custom component we had to use Canvas te draw it.

Does anyone know of a way to access the contents of the Canvas in testing? e.g.: a drawText is used and we would like to validate the value displayed. Can this be done by reading it directly from the Canvas in testing or must we attempt to validate this value in our testing before getting to the point of drawing it on the Canvas

[Albert Chang]

You’ll need to either validate the semantics property or validate the snapshot.
Btw if you draw text manually, you should properly set the semantics property (namely text) anyway for accessibility (so that the screen reader can read the text).

[Tom Truyen]

But you can't add a semantics modifier, or any modifier for that matter to a drawText so is there an alternative?

[Albert Chang]

Apply the semantics modifier to the canvas.

[Tom Truyen]

Yea but in the DrawScope how can I access the value of the drawText that can't be done with the semantics on the Canvas itself

[Albert Chang]

You can’t.

[Zach Klippenstein (he/him) [MOD]]

How are you getting the text inside the draw function? Just pass that same text to the semantics modifier

[Tom Truyen]

Oh yea like that is possible I guess. Unfortunately we have decided to globally use contentDescription on each component and since I have multiple texts this won't work for our specific use case but it is a good idea nonetheless