Roman problem.

elixir/roman-numerals/lib/roman_numerals.ex

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+defmodule RomanNumerals do
+  @doc """
+  Convert the number to a roman number.
+  """
+  @spec numeral(pos_integer) :: String.t()
+  def numeral(number) do
+  end
+end

elixir/roman-numerals/mix.exs

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+defmodule RomanNumerals.MixProject do
+  use Mix.Project
+
+  def project do
+    [
+      app: :roman_numerals,
+      version: "0.1.0",
+      # elixir: "~> 1.8",
+      start_permanent: Mix.env() == :prod,
+      deps: deps()
+    ]
+  end
+
+  # Run "mix help compile.app" to learn about applications.
+  def application do
+    [
+      extra_applications: [:logger]
+    ]
+  end
+
+  # Run "mix help deps" to learn about dependencies.
+  defp deps do
+    [
+      # {:dep_from_hexpm, "~> 0.3.0"},
+      # {:dep_from_git, git: "https://github.com/elixir-lang/my_dep.git", tag: "0.1.0"}
+    ]
+  end
+end

elixir/roman-numerals/test/roman_numerals_test.exs

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+defmodule RomanNumeralsTest do
+  use ExUnit.Case
+
+  # @tag :pending
+  test "1" do
+    assert RomanNumerals.numeral(1) == "I"
+  end
+
+  @tag :pending
+  test "2" do
+    assert RomanNumerals.numeral(2) == "II"
+  end
+
+  @tag :pending
+  test "3" do
+    assert RomanNumerals.numeral(3) == "III"
+  end
+
+  @tag :pending
+  test "4" do
+    assert RomanNumerals.numeral(4) == "IV"
+  end
+
+  @tag :pending
+  test "5" do
+    assert RomanNumerals.numeral(5) == "V"
+  end
+
+  @tag :pending
+  test "6" do
+    assert RomanNumerals.numeral(6) == "VI"
+  end
+
+  @tag :pending
+  test "9" do
+    assert RomanNumerals.numeral(9) == "IX"
+  end
+
+  @tag :pending
+  test "27" do
+    assert RomanNumerals.numeral(27) == "XXVII"
+  end
+
+  @tag :pending
+  test "48" do
+    assert RomanNumerals.numeral(48) == "XLVIII"
+  end
+
+  @tag :pending
+  test "59" do
+    assert RomanNumerals.numeral(59) == "LIX"
+  end
+
+  @tag :pending
+  test "93" do
+    assert RomanNumerals.numeral(93) == "XCIII"
+  end
+
+  @tag :pending
+  test "141" do
+    assert RomanNumerals.numeral(141) == "CXLI"
+  end
+
+  @tag :pending
+  test "163" do
+    assert RomanNumerals.numeral(163) == "CLXIII"
+  end
+
+  @tag :pending
+  test "402" do
+    assert RomanNumerals.numeral(402) == "CDII"
+  end
+
+  @tag :pending
+  test "575" do
+    assert RomanNumerals.numeral(575) == "DLXXV"
+  end
+
+  @tag :pending
+  test "911" do
+    assert RomanNumerals.numeral(911) == "CMXI"
+  end
+
+  @tag :pending
+  test "1024" do
+    assert RomanNumerals.numeral(1024) == "MXXIV"
+  end
+
+  @tag :pending
+  test "3000" do
+    assert RomanNumerals.numeral(3000) == "MMM"
+  end
+end

elixir/roman-numerals/test/test_helper.exs

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+ExUnit.start()
+ExUnit.configure(exclude: :pending, trace: true)