Add unit tests for Configuration#config_files

test/test_configuration.rb

@@ -25,6 +25,30 @@ class TestConfiguration < Test::Unit::TestCase
       assert_equal @string_keys, @string_keys.stringify_keys
     end
   end
+  context "#config_files" do
+    setup do
+      @config = Configuration[Configuration::DEFAULTS]
+      @base_config     = {"source" => source_dir}
+      @no_override     = @base_config.merge({})
+      @one_config_file = @base_config.merge({ "config" => "config.yml" })
+      @multiple_files  = @base_config.merge({ "config" => %w[config/site.yml config/deploy.yml configuration.yml] })
+    end
+
+    should "always return an array" do
+      assert @config.config_files(@no_override).is_a?(Array)
+      assert @config.config_files(@one_config_file).is_a?(Array)
+      assert @config.config_files(@multiple_files).is_a?(Array)
+    end
+    should "return the default config path if no config files are specified" do
+      assert_equal [File.join(source_dir, "_config.yml")], @config.config_files(@no_override)
+    end
+    should "return the config if given one config file" do
+      assert_equal %w[config.yml], @config.config_files(@one_config_file)
+    end
+    should "return an array of the config files if given many config files" do
+      assert_equal %w[config/site.yml config/deploy.yml configuration.yml], @config.config_files(@multiple_files)
+    end
+  end
   context "loading configuration" do
     setup do
       @path = File.join(Dir.pwd, '_config.yml')