Add initial topic tests

spec/factories/topic.rb

@@ -0,0 +1,5 @@
+FactoryGirl.define do
+  factory :topic do
+    sequence(:title) { |n| "Forum Title #{n}" }
+  end
+end

spec/models/topic_spec.rb

@@ -0,0 +1,30 @@
+# == Schema Information
+#
+# Table name: topics
+#
+#  id         :integer          not null, primary key
+#  title      :string(255)
+#  user_id    :integer
+#  forum_id   :integer
+#  created_at :datetime
+#  updated_at :datetime
+#  state      :integer          default(0), not null
+#
+
+require "spec_helper"
+
+describe Topic do
+  let!(:user) { create :user }
+  let!(:forum) { create :forum }
+
+  describe "create" do
+    let(:topic) { build :topic, user: user, forum: forum }
+
+    it "creates a new topic" do
+      topic.first_post = "Foo"
+      expect do
+        topic.save!
+      end.to change(Topic, :count).by(1)
+    end
+  end
+end