shutdown async tasks 2

[SteffenDE]

No description provided.

[josevalim]

I prefer the other one :)

[SteffenDE]

@josevalim both this and #3990 doesn't work. The LiveView channels are started under the test supervisor and because the tasks are still linked to the channel and don't trap exits themselves, quoting the docs

:shutdown - :brutal_kill if the tasks must be killed directly on shutdown or an integer indicating the timeout value, defaults to 5000 milliseconds. The tasks must trap exits for the timeout to have an effect.

they still exit immediately and we get a DBConnection.ConnectionError.

I tested this by creating a fresh project, running phx.gen.auth and adding a

socket =
      assign_async(socket, :foo, fn ->
        Dayzee.Repo.transact(fn ->
          Process.sleep(10)

          {:ok, %{foo: :bar}}
        end)
      end)

into the mount of login.ex.