Ensure to return the correct template name for namespaced views

lib/lotus/view/dsl.rb

@@ -1,4 +1,4 @@
-require 'lotus/utils/string'
+require 'lotus/view/rendering/template_name'
 require 'lotus/view/rendering/layout_finder'
 
 module Lotus
@@ -124,11 +124,106 @@ def format(value = nil)
       #
       #   Articles::Show.template     # => 'articles/single_article'
       #   Articles::JsonShow.template # => 'articles/single_article'
+      #
+      # @example With namespace
+      #   require 'lotus/view'
+      #
+      #   module Furnitures
+      #     View = Lotus::View.duplicate
+      #
+      #     View.configure do
+      #       namespace 'Furnitures'
+      #     end
+      #
+      #     class Standalone
+      #       include Furnitures::View
+      #     end
+      #
+      #     module Catalog
+      #       class Index
+      #         Furnitures::View
+      #       end
+      #     end
+      #   end
+      #
+      #   Furnitures::Standalone.template     # => 'standalone'
+      #   Furnitures::Catalog::Index.template # => 'catalog/index'
+      #
+      # @example With nested namespace
+      #   require 'lotus/view'
+      #
+      #   module Frontend
+      #     View = Lotus::View.duplicate
+      #
+      #     View.configure do
+      #       namespace 'Frontend::Views'
+      #     end
+      #
+      #     class StandaloneView
+      #       include Frontend::View
+      #     end
+      #
+      #     module Views
+      #       class Standalone
+      #         include Frontend::View
+      #       end
+      #
+      #       module Sessions
+      #         class New
+      #           include Frontend::View
+      #         end
+      #       end
+      #     end
+      #   end
+      #
+      #   Frontend::StandaloneView.template       # => 'standalone_view'
+      #   Frontend::Views::Standalone.template    # => 'standalone'
+      #   Frontend::Views::Sessions::New.template # => 'sessions/new'
+      #
+      # @example With deeply nested namespace
+      #   require 'lotus/view'
+      #
+      #   module Bookshelf
+      #     module Web
+      #       View = Lotus::View.duplicate
+      #
+      #       View.configure do
+      #         namespace 'Bookshelf::Web::Views'
+      #       end
+      #
+      #       module Views
+      #         module Books
+      #           class Show
+      #             include Bookshelf::Web::View
+      #           end
+      #         end
+      #       end
+      #     end
+      #
+      #     module Api
+      #       View = Lotus::View.duplicate
+      #
+      #       View.configure do
+      #         namespace 'Bookshelf::Api::Views'
+      #       end
+      #
+      #       module Views
+      #         module Books
+      #           class Show
+      #             include Bookshelf::Api::View
+      #           end
+      #         end
+      #       end
+      #     end
+      #   end
+      #
+      #   Bookshelf::Web::Views::Books::Index.template # => 'books/index'
+      #   Bookshelf::Api::Views::Books::Index.template # => 'books/index'
       def template(value = nil)
         if value
           @@template = value
         else
-          @@template ||= Utils::String.new(name).underscore
+          @@template ||= Rendering::TemplateName.new(name, configuration.namespace).to_s
         end
       end
 

lib/lotus/view/rendering/template_name.rb

@@ -0,0 +1,37 @@
+require 'lotus/utils/string'
+
+module Lotus
+  module View
+    module Rendering
+      # @since 0.2.0
+      class TemplateName
+        NAMESPACE_SEPARATOR = '::'.freeze
+
+        def initialize(name, namespace)
+          @name = name
+          compile!(namespace)
+        end
+
+        def to_s
+          @name
+        end
+
+        private
+        def compile!(namespace)
+          tokens(namespace) {|token| replace!(token) }
+          @name = Utils::String.new(@name).underscore
+        end
+
+        def tokens(namespace)
+          namespace.to_s.split(NAMESPACE_SEPARATOR).each do |token|
+            yield token
+          end
+        end
+
+        def replace!(token)
+          @name.gsub!(%r{\A#{ token }#{ NAMESPACE_SEPARATOR }}, '')
+        end
+      end
+    end
+  end
+end

test/fixtures.rb

@@ -207,7 +207,7 @@ module CardDeck
     configuration.reset!
     configure do
       namespace CardDeck
-      root __dir__ + '/fixtures/templates/card_deck'
+      root __dir__ + '/fixtures/templates/card_deck/app/templates'
       layout :application
     end
   end
@@ -216,7 +216,15 @@ class ApplicationLayout
     include Lotus::Layout
   end
 
+  class StandaloneView
+    include CardDeck::View
+  end
+
   module Views
+    class Standalone
+      include CardDeck::View
+    end
+
     module Dashboard
       class Index
         include CardDeck::View

test/fixtures/templates/card_deck/app/templates/dashboard/index.html.erb

@@ -0,0 +1 @@
+<h1>Dashboard</h1>

test/fixtures/templates/card_deck/app/templates/dashboard/index.json.erb

@@ -0,0 +1 @@
+{}

test/fixtures/templates/hello_world.html.erb

@@ -0,0 +1 @@
+<h1>Hello, World!</h1>

test/integration/configuration_test.rb

@@ -10,7 +10,7 @@
 
   it 'sets a root path' do
     card_configuration = CardDeck::View.configuration
-    card_configuration.root.must_equal(Pathname.new('test/fixtures/templates/card_deck').realpath)
+    card_configuration.root.must_equal(Pathname.new('test/fixtures/templates/card_deck/app/templates').realpath)
   end
 
   it 'sets a layout' do