Relax the elixir_make version constraint (#7)

and also fix a few lingering issues

lib/nerves/neopixel.ex

@@ -48,7 +48,7 @@ defmodule Nerves.Neopixel do
     payload =
       {channel, {brightness, data}}
       |> :erlang.term_to_binary
-    send s.port, {self, {:command, payload}}
+    send s.port, {self(), {:command, payload}}
     {:reply, :ok, s}
   end
 

mix.exs

@@ -3,23 +3,23 @@ defmodule Nerves.Neopixel.Mixfile do
 
   def project do
    [app: :nerves_neopixel,
-    version: "0.3.0",
+    version: "0.3.1",
     description: "Drive WS2812B \"NeoPixel\" RGB LED strips from a Raspberry Pi using Elixir.",
     elixir: "~> 1.3",
     make_clean: ["clean"],
     compilers: [:elixir_make | Mix.compilers],
     build_embedded: Mix.env == :prod,
     start_permanent: Mix.env == :prod,
-    package: package,
-    deps: deps]
+    package: package(),
+    deps: deps()]
   end
 
   def application do
    [applications: [:logger]]
   end
 
   defp deps do
-    [{:elixir_make, "~> 0.3.0"}]
+    [{:elixir_make, "~> 0.3"}]
   end
 
   defp package do

test/neopixel_test.exs

@@ -1,18 +1,30 @@
 defmodule Nerves.Neopixel.Test do
 
   use ExUnit.Case
-  doctest Nerves.IO.Neopixel
+  doctest Nerves.Neopixel
 
-  alias Nerves.IO.Neopixel
+  alias Nerves.Neopixel
 
   test "configuring a Neopixel interface" do
-    {:ok, pid} = Neopixel.setup pin: 18, count: 5
+    ch0_config = [pin: 18, count: 3]
+    ch1_config = [pin: 19, count: 3]
+    {:ok, pid} = Neopixel.start_link(ch0_config, ch1_config)
     assert is_pid(pid)
   end
 
   test "rendering a pixel" do
-    {:ok, pid} = Neopixel.setup pin: 18, count: 5
+    ch0_config = [pin: 18, count: 3]
+    ch1_config = [pin: 19, count: 3]
+    {:ok, pid} = Neopixel.start_link(ch0_config, ch1_config)
     assert is_pid(pid)
-    assert Neopixel.render(pid, <<255, 0, 16>>) == :ok
+
+    channel = 0
+    intensity = 127
+    data = [
+      {255, 0, 0},
+      {0, 255, 0},
+      {0, 0, 255},
+    ]
+    assert Neopixel.render(channel, {intensity, data}) == :ok
   end
 end