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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.ex
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lib/mix_test_watch.ex 

defmodule MixTestWatch do

  @moduledoc """

  Automatically run your Elixir project's tests each time you save a file.

  Because TDD is awesome.

  """



  use Application

  alias MixTestWatch.Watcher



  #

  # Public interface

  #



  @spec run([String.t]) :: no_return

  def run(args \\ []) when is_list(args) do

    Mix.env :test

    put_config(args)

    :ok = Application.ensure_started(:fs)

    :ok = Application.ensure_started(:mix_test_watch)

    Watcher.run_tasks

    no_halt_unless_in_repl()

  end





  #

  # Application callback

  #



  def start(_type, _args) do

    import Supervisor.Spec, warn: false

    children = [

      worker(Watcher, []),

    ]

    opts = [strategy: :one_for_one, name: Sup.Supervisor]

    Supervisor.start_link(children, opts)

  end





  #

  # Internal functions

  #



  defp put_config(args) do

    config = MixTestWatch.Config.new(args)

    Application.put_env(:mix_test_watch, :__config__, config, persistent: true)

  end



  defp no_halt_unless_in_repl do

    unless Code.ensure_loaded?(IEx) && IEx.started? do

      :timer.sleep :infinity

    end

  end

end