This appears to work for me:
test "connected mount", %{conn: conn} do
{:ok, view, _html} = live(conn, "/my-path")
assert view.assigns[:some_key] == expected_value
end
The reason I want to do this is that I have a parent LiveView with a couple of children. I want to send a message to a child to refresh when something happens in the parent. To do this, I need the child to have a unique ID so I can send it a message without sending that message to other children on the server with that same id (pretty sure this is how it works?). I don’t want to load the data in the parent because the children are somewhat complicated and the code is nice if they load their own data.
In the LiveView test, I need access to the child using find_live_child and to do that I need its id. Which is stored in the assigns.
I wrote all that up because I think it’s a valid reason to need access to the assigns, and also because maybe my overall approach isn’t right and someone can tell me.
Update: I’m going to have the child LiveView register with its parent instead of looking up the pid. I think this will be more elegant and make it so I don’t need that unique id on the child.
