added tests for handling of tags and catergories, see #73 and #84

test/source/_posts/2009-01-27-empty-categories.textile

@@ -0,0 +1,7 @@
+---
+layout: default
+title: Category in YAML
+categories:
+---
+
+Best *post* ever

test/source/_posts/2009-01-27-empty-category.textile

@@ -0,0 +1,7 @@
+---
+layout: default
+title: Category in YAML
+category:
+---
+
+Best *post* ever

test/source/_posts/2009-05-18-empty-tag.textile

@@ -0,0 +1,6 @@
+---
+title: A Tag
+tag:
+---
+
+Whoa.

test/source/_posts/2009-05-18-empty-tags.textile

@@ -0,0 +1,6 @@
+---
+title: Some Tags
+tags:
+---
+
+Awesome!

test/test_generated_site.rb

@@ -14,7 +14,7 @@ class TestGeneratedSite < Test::Unit::TestCase
     end
 
     should "ensure post count is as expected" do
-      assert_equal 18, @site.posts.size
+      assert_equal 22, @site.posts.size
     end
 
     should "insert site.posts into the index" do

test/test_post.rb

@@ -236,6 +236,16 @@ class TestPost < Test::Unit::TestCase
         assert post.categories.include?('baz')
       end
 
+      should "recognize empty category in yaml" do
+        post = setup_post("2009-01-27-empty-category.textile")
+        assert_equal [], post.categories
+      end
+
+      should "recognize empty categories in yaml" do
+        post = setup_post("2009-01-27-empty-categories.textile")
+        assert_equal [], post.categories
+      end
+
       should "recognize tag in yaml" do
         post = setup_post("2009-05-18-tag.textile")
         assert post.tags.include?('code')
@@ -248,6 +258,16 @@ class TestPost < Test::Unit::TestCase
         assert post.tags.include?('pizza')
       end
       
+      should "recognize empty tag in yaml" do
+        post = setup_post("2009-05-18-empty-tag.textile")
+        assert_equal [], post.tags
+      end
+
+      should "recognize empty tags in yaml" do
+        post = setup_post("2009-05-18-empty-tags.textile")
+        assert_equal [], post.tags
+      end
+
       should "allow no yaml" do
         post = setup_post("2009-06-22-no-yaml.textile")
         assert_equal "No YAML.", post.content