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francis test support plug_tester.ex
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test/support/plug_tester.ex

defmodule Support.PlugTester do
@moduledoc """
Plug to test Francis plug applying order
"""
import Plug.Conn
def init(opts), do: opts
def call(%{assigns: assigns} = conn, to_assign: to_assign) do
case Map.get(assigns, :plug_assigned) do
nil -> assign(conn, :plug_assigned, [to_assign])
value -> assign(conn, :plug_assigned, value ++ [to_assign])
end
end
end