create mock_helpers for tests

test/support/mock_helpers.ex

@@ -0,0 +1,20 @@
+defmodule Aprs.MockHelpers do
+  @moduledoc """
+  Provides mocks and stubs for tests.
+  """
+
+  alias Aprs.BadPacket
+  alias Aprs.Packets
+
+  def stub_packets_mock do
+    Mox.defmock(PacketsMock, for: Packets)
+
+    Mox.stub_with(PacketsMock, PacketsStub)
+  end
+
+  def stub_badpackets_mock do
+    Mox.defmock(BadPacketsMock, for: BadPacket)
+
+    Mox.stub_with(BadPacketsMock, BadPacketsStub)
+  end
+end