Openflow parser

test/ofp_features_test.exs

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+defmodule OfpFeaturesTest do
+  use ExUnit.Case
+  doctest Openflow
+
+  describe "Openflow.read/1" do
+    test "with OFP_FEATURES_REQUEST packet" do
+      {:ok, %Openflow.Features.Request{} = features, ""} =
+        "test/packet_data/ofp_features_request.raw"
+        |> File.read!
+        |> Openflow.read
+      assert features.version == 4
+      assert features.xid == 0
+    end
+
+    test "with OFP_FEATURES_REPLY packet" do
+      {:ok, %Openflow.Features.Reply{} = features, ""} =
+        "test/packet_data/ofp_features_reply.raw"
+        |> File.read!
+        |> Openflow.read
+      assert features.version == 4
+      assert features.xid == 0
+      assert features.datapath_id == "0000000000000001"
+      assert features.n_buffers == 255
+      assert features.n_tables == 255
+      assert features.aux_id == 0
+      assert features.capabilities == [:flow_stats, :table_stats, :port_stats, :group_stats, :queue_stats]
+    end
+  end
+
+  describe "Openflow.to_binary/1" do
+    test "with %Openflow.Features.Request{}" do
+      features = %Openflow.Features.Request{
+        version: 4,
+        xid: 0
+      }
+      expect =
+        "test/packet_data/ofp_features_request.raw"
+        |> File.read!
+      assert Openflow.to_binary(features) == expect
+    end
+  end
+
+  test "with %Openflow.Features.Reply{}" do
+    features = %Openflow.Features.Reply{
+      version: 4,
+      xid: 0,
+      datapath_id: "0000000000000001",
+      n_buffers: 255,
+      n_tables: 255,
+      aux_id: 0,
+      capabilities: [:flow_stats, :table_stats, :port_stats, :group_stats, :queue_stats],
+    }
+    expect =
+      "test/packet_data/ofp_features_reply.raw"
+      |> File.read!
+    assert Openflow.to_binary(features) == expect
+  end
+end