39 lines
1.3 KiB
Elixir
39 lines
1.3 KiB
Elixir
defmodule Aprsme.SignalHandlerTest do
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use ExUnit.Case, async: true
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alias Aprsme.SignalHandler
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describe "handle_info/2" do
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test "ignores unrecognized messages without changing state" do
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state = %{some: :state}
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assert SignalHandler.handle_info(:random, state) == {:noreply, state}
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assert SignalHandler.handle_info({:other, "msg"}, state) == {:noreply, state}
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end
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test "sigterm branch spawn_links a shutdown task without crashing the caller" do
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# Trap exits so the spawn_link from handle_info doesn't bring the test down
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# when the shutdown task inevitably fails (ShutdownHandler is either not
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# running or would actually stop the VM if it were).
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Process.flag(:trap_exit, true)
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assert {:noreply, :state_x} =
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SignalHandler.handle_info({:signal, :sigterm}, :state_x)
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# Drain any :EXIT messages from the spawned task; we don't care about
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# the outcome, only that the callback ran.
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receive do
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{:EXIT, _pid, _reason} -> :ok
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after
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200 -> :ok
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end
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end
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end
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describe "init/1" do
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test "installs a SIGTERM handler and returns an empty state" do
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# :os.set_signal is process-global but calling it a second time with
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# :handle is idempotent at the VM level. Safe to exercise.
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assert {:ok, %{}} = SignalHandler.init([])
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end
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end
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end
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