Add a tiny elixir test

lib/geef.ex

@@ -3,6 +3,7 @@ defmodule Geef do
   defmacro __using__(_) do
     quote do
       alias Geef.Repository
+      alias Geef.Odb
       alias Geef.Reference
       alias Geef.Object
       alias Geef.Commit

test/object_test.exs

@@ -0,0 +1,23 @@
+Code.require_file "../test_helper.exs", __FILE__
+
+defmodule ObjectTest do
+  use ExUnit.Case
+  use Geef
+
+  defp tmp_dir do
+    {a, b, c} = :erlang.now()
+    n = node()
+    dir = :io_lib.format("geef-~p~p~p~p.git", [n, a, b, c])
+    Path.join(System.tmp_dir!, dir)
+  end
+
+  test "object OO helpers" do
+    dir = tmp_dir
+    { :ok, repo } = Repository.init(dir, true)
+    { :ok, odb } = Repository.odb(repo)
+    #{ :ok, index } = :geef_index.new
+
+    content = "I'm some content"
+    Odb.write(odb, content, :blob)
+  end
+end

test/test_helper.exs

@@ -0,0 +1 @@
+ExUnit.start