add count of comments to posts partial

app/views/posts/_single.html.haml

@@ -21,3 +21,6 @@
           :markdown
             #{ strip_tags post.body }
 
+        .post-comments
+          = pluralize post.comments.count, "comment"
+

spec/views/posts/_single.html.haml_spec.rb

@@ -0,0 +1,51 @@
+require 'spec_helper'
+
+describe "posts/_single" do
+  before(:each) do
+    @post = FactoryGirl.create(:post)
+  end
+
+  context "0 comments" do
+    before(:each) do
+      render :partial => "single", :locals => {
+        :post => @post
+      }
+    end
+
+    it "renders the number of comments" do
+      rendered.should contain "0 comments"
+    end
+  end
+
+  context "1 comment" do
+    before(:each) do
+      @comment = FactoryGirl.create(:comment, :post => @post)
+      render :partial => "single", :locals => {
+        :post => @post
+      }
+    end
+
+    it "renders the number of comments" do
+      rendered.should contain "1 comment"
+    end
+  end
+
+  context "2 comments" do
+    before(:each) do
+      @comment = FactoryGirl.create(:comment, :post => @post)
+      @comment2 = FactoryGirl.create(:comment, :post => @post)
+      render :partial => "single", :locals => {
+        :post => @post
+      }
+    end
+
+    it "renders the number of comments" do
+      rendered.should contain "2 comments"
+    end
+  end
+
+end
+
+
+
+