Fixing tests, and making it more ruby friendly

lib/jekyll.rb

@@ -138,7 +138,7 @@ module Jekyll
     # Get configuration from <source>/_config.yml or <source>/<config_file>
     config_files = override.delete('config')
     config_files = File.join(source, "_config.yml") if config_files.to_s.empty?
-    if not config_files.is_a? Array
+    unless config_files.is_a? Array
       config_files = [config_files]
     end
 

test/test_configuration.rb

@@ -46,6 +46,12 @@ class TestConfiguration < Test::Unit::TestCase
       assert_equal Jekyll::DEFAULTS.deep_merge({ "baseurl" => "http://wahoo.dev" }), Jekyll.configuration({ "config" => @paths[:other] })
     end
 
+    should "load default config if path passed is empty" do
+      mock(YAML).safe_load_file(@paths[:default]) { Hash.new }
+      mock($stdout).puts("Configuration file: #{@paths[:default]}")
+      assert_equal Jekyll::DEFAULTS, Jekyll.configuration({ "config" => @paths[:empty] })
+    end
+
     should "load multiple config files" do
       mock(YAML).safe_load_file(@paths[:default]) { Hash.new }
       mock(YAML).safe_load_file(@paths[:other]) { Hash.new }