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A library to declaratively write testable effects for asynchronous testing

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efx lib efx_case fun_util.ex
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lib/efx_case/fun_util.ex 

defmodule EfxCase.FunUtil do

  @moduledoc false



  for arity <- 0..20 do

    args = for i <- 0..arity, i != 0, do: Macro.var(:"_arg#{i}", nil)

    def unquote(:"constantly_#{arity}")(ret), do: fn unquote_splicing(args) -> ret end

  end



  def constantly(arity, ret) do

    Kernel.apply(EfxCase.FunUtil, :"constantly_#{arity}", [ret])

  end

end