add top page

spec/models/top_topic_spec.rb

@@ -0,0 +1,30 @@
+require 'spec_helper'
+
+describe TopTopic do
+
+  it { should belong_to :topic }
+
+  context "refresh!" do
+
+    let!(:t1) { Fabricate(:topic) }
+    let!(:t2) { Fabricate(:topic) }
+
+    it "begins blank" do
+      TopTopic.all.should be_blank
+    end
+
+    context "after calculating" do
+
+      before do
+        TopTopic.refresh!
+      end
+
+      it "should have top topics" do
+        TopTopic.pluck(:topic_id).should =~ [t1.id, t2.id]
+      end
+
+    end
+
+  end
+
+end