File generated from /Users/batate/mastery/lib/mastery/core/validator.ex by COVER 2019-03-16 at 12:03:51

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        |  defmodule Mastery.Core.Validator do
        |    def require(errors, fields, field_name, validator) do
     0..|      if Map.has_key?(fields, field_name) do
     0..|        case fields |> Map.fetch!(field_name) |> validator.() do
        |          :ok ->
     0..|            errors
        |          {:error, message} ->
     0..|            errors ++ [{field_name, message}]
        |          {:errors, messages} ->
     0..|            errors ++ Enum.map(messages, &{field_name, &1})
        |        end
        |      else
     0..|        errors ++ [{field_name, "is required"}]
        |      end
        |    end
        |  
        |    def optional(errors, fields, field_name, validator) do
     0..|      if Map.has_key?(fields, field_name) do
     0..|        require(errors, fields, field_name, validator)
        |      else
        |        :ok
        |      end
        |    end
        |  end