allanegidio

allanegidio

How to test liveview page with async_nolink interactions?

Howdy

I’ve been having some problems to test async_nolink function.
My mount have a function like that:

Task.Supervisor.async_nolink(TaskSupervisor, fn ->
    Accounts.get_dashboard(user.id)
end)

And I have a handle_info like that:

def handle_info({task_ref, dashboard_data}, socket) do
    Process.demonitor(task_ref, [:flush])
    {:noreply, assign(socket, dashboard_data)}
  end

It is working pretty well but when I test and send my message like that:

{:ok, live, _html} = live(conn, ~p"/")
send(live.pid, {task_ref?, %{total_users: 100}})

What I should put inside my task_ref during tests?

Marked As Solved

JohnnyCurran

JohnnyCurran

If you want to do asynchronous assigns, you should probably be using assign_async
https://hexdocs.pm/phoenix_live_view/Phoenix.LiveView.html#assign_async/3

More info:

Also Liked

adw632

adw632

You can’t do it like that as the live view process is getting a process monitor when it starts the Task using the task supervisor. That is why it demonitors it once it gets the Account results.

You can probably use Mock for the Accounts.get_dashboard() call to return the canned response and all the process messaging will work the same.

allanegidio

allanegidio

Beautiful.
It worked so well thank you!

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