refactor tags (Part II)

* prefer more testable and clearer way
* actually fixed a bug that Link was_not a Page. now everything conforms to the document, I believe

lib/kaminari/tags.rb

@@ -26,19 +26,24 @@ def to_s(locals = {}) #:nodoc:
       end
 
       private
+      def self.ancestor_renderables
+        arr = []
+        ancestors.each do |klass|
+          arr << klass if klass != Renderable
+          return arr if klass == Tag
+        end
+      end
+
       # OMG yet another super dirty hack
       # this method finds
       #   1. a template for the given class from app/views
       #   2. a template for its parent class from app/views
       #   3. the default one inside the engine
-      def find_template(klass = self.class)
-        if @renderer.partial_exists? klass.template_filename
-          "kaminari/#{klass.template_filename}"
-        elsif (parent = klass.ancestors[1]) == Renderable
-          "kaminari/#{self.class.template_filename}"
-        else
-          find_template parent
+      def find_template
+        self.class.ancestor_renderables.each do |klass|
+          return "kaminari/#{klass.template_filename}" if @renderer.partial_exists? klass.template_filename
         end
+        "kaminari/#{self.class.template_filename}"
       end
 
       def page_url_for(page)

spec/helpers/tags_spec.rb

@@ -2,25 +2,50 @@
 include Kaminari::Helpers
 
 describe 'Kaminari::Helpers' do
-  let :renderer do
-    stub(r = Object.new) do
-      render.with_any_args
-      options { {} }
-      params { {} }
-      partial_exists?.with_any_args {|a| puts a; false }
-      url_for {|h| "/foo?page=#{h[:page]}"}
-    end
-    r
-  end
-  describe 'PageLink' do
-    subject { PageLink.new renderer, :page => 3 }
-    its('class.template_filename') { should == 'page_link' }
-    describe 'template lookup rule' do
-      before do
-        pending "spies doesn't work on RSpec 2 ATM: https://github.com/btakita/rr/issues#issue/45"
-        subject.to_s
-      end
-      specify { renderer.should have_received.partial_exists? PageLink }
+  describe 'template lookup rule' do
+    describe 'Tag' do
+      subject { Tag }
+      its(:ancestor_renderables) { should == [Tag] }
+    end
+    describe 'Paginator' do
+      subject { Paginator }
+      its(:ancestor_renderables) { should == [Paginator, Tag] }
+    end
+    describe 'PrevLink' do
+      subject { PrevLink }
+      its(:ancestor_renderables) { should == [PrevLink, Prev, Link, Page, Tag] }
+    end
+    describe 'PrevSpan' do
+      subject { PrevSpan }
+      its(:ancestor_renderables) { should == [PrevSpan, Prev, NonLink, Tag] }
+    end
+    describe 'FirstPageLink' do
+      subject { FirstPageLink }
+      its(:ancestor_renderables) { should == [FirstPageLink, PageLink, Link, Page, Tag] }
+    end
+    describe 'PageLink' do
+      subject { PageLink }
+      its(:ancestor_renderables) { should == [PageLink, Link, Page, Tag] }
+    end
+    describe 'CurrentPage' do
+      subject { CurrentPage }
+      its(:ancestor_renderables) { should == [CurrentPage, NonLink, Page, Tag] }
+    end
+    describe 'TruncatedSpan' do
+      subject { TruncatedSpan }
+      its(:ancestor_renderables) { should == [TruncatedSpan, NonLink, Tag] }
+    end
+    describe 'LastPageLink' do
+      subject { LastPageLink }
+      its(:ancestor_renderables) { should == [LastPageLink, PageLink, Link, Page, Tag] }
+    end
+    describe 'NextLink' do
+      subject { NextLink }
+      its(:ancestor_renderables) { should == [NextLink, Next, Link, Page, Tag] }
+    end
+    describe 'NextSpan' do
+      subject { NextSpan }
+      its(:ancestor_renderables) { should == [NextSpan, Next, NonLink, Tag] }
     end
   end
 end