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@doc """
Will ensure the processes with the test does not complete until the process with the
provided pid has exited. This is necessary when writing multiple tests that start the
same named process. See for more info.
This accepts either `{:ok, pid}` or just `pid` so that you can use it in a pipeline
after a `start_link` call.
def synchronize_death_on_exit({:ok, pid}) when is_pid(pid), do: synchronize_death_on_exit(pid)
def synchronize_death_on_exit(pid) when is_pid(pid) do
ExUnit.Callbacks.on_exit fn ->
ref = Process.monitor(pid)
receive do
{:DOWN, ^ref, _, _, _} -> :ok
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