Openflow parser

test/ofp_echo_test.exs

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+defmodule OfpEchoTest do
+  use ExUnit.Case
+  doctest Openflow
+
+  describe "Openflow.read/1" do
+    test "with OFP_ECHO_REQUEST packet" do
+      {:ok, %Openflow.Echo.Request{} = echo, ""} =
+        "test/packet_data/ofp_echo_request.raw"
+        |> File.read!
+        |> Openflow.read
+      assert echo.version == 4
+      assert echo.xid == 0
+      assert echo.data == ""
+    end
+
+    test "with OFP_ECHO_REPLY packet" do
+      {:ok, %Openflow.Echo.Reply{} = echo, ""} =
+        "test/packet_data/ofp_echo_reply.raw"
+        |> File.read!
+        |> Openflow.read
+      assert echo.version == 4
+      assert echo.xid == 0
+      assert echo.data == ""
+    end
+  end
+
+  describe "Openflow.to_binary/1" do
+    test "with %Openflow.Echo.Request{}" do
+      echo = %Openflow.Echo.Request{
+        version: 4,
+        xid: 0,
+        data: ""
+      }
+      expect =
+        "test/packet_data/ofp_echo_request.raw"
+        |> File.read!
+      assert Openflow.to_binary(echo) == expect
+    end
+
+    test "with %Openflow.Echo.Reply{}" do
+      echo = %Openflow.Echo.Reply{
+        version: 4,
+        xid: 0,
+        data: ""
+      }
+      expect =
+        "test/packet_data/ofp_echo_reply.raw"
+        |> File.read!
+      assert Openflow.to_binary(echo) == expect
+    end
+  end
+end