Added GenServer Koans

test/koans/genservers_koans_test.exs

@@ -0,0 +1,21 @@
+defmodule GenServersTests do
+  use ExUnit.Case
+  import TestHarness
+
+  test "GenServers" do
+    answers = [
+      true,
+      "Hey Arnold!",
+      1234,
+      {:multiple, ["Tribe Bicycle Co.", "CRMO Series"]},
+      ["this", "is", "sparta"],
+      "Hello",
+      {:error, "Incorrect password!"},
+      "Congrats! Your process was successfully named.",
+      {:ok, "Bicycle unlocked!"},
+      {:multiple, ["Bicycle unlocked!", "Incorrect password!", "Argh...Jack Sparrow's password is: Elixir"]},
+    ]
+
+    test_all(GenServers, answers)
+  end
+end