Dashboards and row level security

tusmo.

RLS is applicable to Dashboard also. However you can test with the "test as role" option for the role you have define, it does not automatically apply to the reports and datasets unless you have explicitly defined this in a DAX function that looks up on the user UPN.

You can read more on this from this chat.
https://community.powerbi.com/t5/Service/Row-Level-Security-quot-Test-as-role-quot-in-web-browser-no/m-p/232362

Also note that the option to "test as role" as been removed from the Power BI services initial screen as it use to be before. Details here 

https://ideas.powerbi.com/forums/265200-power-bi-ideas/suggestions/20556391-please-bring-back-test-as-role-in-power-bi-servi

You can however still test this option my following this steps: On the dataset that you defined a role, right on it and select the security option that bring you to the Row-Level Security page(Note. You should see the roles you have defined in Power BI desktop). Then click on the little 3 dots for more option then you would see the option to test as the role.