Add Python: Refresh TensorBoard command

[Joyce Er (joyceerhl)]

For #16053

[Kartik Raj (karrtikr)]

No tests to update/add?

[Joyce Er (joyceerhl)]

Kartik Raj (@karrtikr) I don't think it's possible to write a test to verify that this works because we can't inspect the iframed contents. It would be possible to confirm that the TensorBoardSession class refresh method is called when the command is executed, but that's about it.

[Kartik Raj (karrtikr)]

I think it might be possible if you're able to stub window.createWebviewPanel and verify the contents of webviewPanel.webview.html. I leave it upto you.

[Paula (paulacamargo25)]

LGTM

[Joyce Er (joyceerhl)]

Kartik Raj (@karrtikr) sorry no, I meant that it's not possible to verify the contents of the iframe that we create, because that has a cross-origin source (before rewriting, it's a localhost URL). The HTML will only give us the iframe element and the attributes, it won't give us what's actually rendered on the page.

[Kartik Raj (karrtikr)]

Joyce Er (@joyceerhl) I see. Is it useful to atleast verify the the HTML in the test? If not, skipping tests is fine here I think.

[Joyce Er (joyceerhl)]

Yeah the HTML is just going to be whatever we set. Not sure that's worth validating with a test.