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mix_test_watch

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Automatically run tests when files change

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mix_test_watch lib mix_test_watch hot_runner test_task.ex
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lib/mix_test_watch/hot_runner/test_task.ex 

defmodule MixTestWatch.TestTask do

  @moduledoc """

  Runs the `test` mix task, even if it has been run before.

  """

  def run(args) do

    Code.compiler_options(ignore_module_conflict: true)

    unload_test_files()

    reenable_dependancy_tasks()

    Mix.Task.run("test", args)

    cleanup_memory()

  end



  defp test_paths do

    Mix.Project.config()[:test_paths] || ["test"]

  end



  defp unload_test_files do

    test_paths()

    |> Mix.Utils.extract_files("*")

    |> Enum.map(&Path.expand/1)

    |> Code.unload_files()

  end



  defp reenable_dependancy_tasks do

    ~w(loadpaths deps.loadpaths test)

    |> Enum.map(&Mix.Task.reenable/1)

  end



  def cleanup_memory do

    :elixir_config.put(:at_exit, [])

  end

end