add test for PGP key yaml frontmatter

test/source/pgp.key

@@ -0,0 +1,2 @@
+-----BEGIN PGP PUBLIC KEY BLOCK-----
+Version: GnuPG/MacGPG2 v2.0.17 (Darwin)

test/test_generated_site.rb

@@ -48,6 +48,7 @@ class TestGeneratedSite < Test::Unit::TestCase
     should "print a nice list of static files" do
       expected_output = Regexp.new <<-OUTPUT
 - /css/screen.css last edited at \\d+ with extname .css
+- /pgp.key last edited at \\d+ with extname .key
 - /products.yml last edited at \\d+ with extname .yml
 - /symlink-test/symlinked-dir/screen.css last edited at \\d+ with extname .css
 OUTPUT

test/test_site.rb

@@ -187,6 +187,16 @@ class TestSite < Test::Unit::TestCase
       assert_equal posts.size - @num_invalid_posts, @site.posts.size
     end
 
+    should "read pages with yaml front matter" do
+      abs_path = File.expand_path("about.html", @site.source)
+      assert_equal true, @site.send(:has_yaml_header?, abs_path)
+    end
+
+    should "not read PGP keys as pages" do
+      abs_path = File.expand_path("pgp.key", @site.source)
+      assert_equal false, @site.send(:has_yaml_header?, abs_path)
+    end
+
     should "expose jekyll version to site payload" do
       assert_equal Jekyll::VERSION, @site.site_payload['jekyll']['version']
     end