add NullResolver

[#4523 state:resolved]
Signed-off-by: NJosé Valim <jose.valim@gmail.com>

actionpack/lib/action_view/testing/resolvers.rb

@@ -31,5 +31,13 @@ def query(path, exts, formats)
       templates.sort_by {|t| -t.identifier.match(/^#{query}$/).captures.reject(&:blank?).size }
     end
   end
+
+  class NullResolver < ActionView::PathResolver
+    def query(path, exts, formats)
+      handler, format = extract_handler_and_format(path, formats)
+      [ActionView::Template.new("Template generated by Null Resolver", path, handler, :virtual_path => path, :format => format)]
+    end
+  end
+  
 end
 

actionpack/test/template/testing/null_resolver_test.rb

+require 'abstract_unit'
+
+class NullResolverTest < ActiveSupport::TestCase
+  def test_should_return_template_for_any_path
+    resolver = ActionView::NullResolver.new()
+    templates = resolver.find_all("path", "arbitrary", false, {:locale => [], :formats => [:html], :handlers => []})
+    assert_equal 1, templates.size, "expected one template"
+    assert_equal "Template generated by Null Resolver", templates.first.source
+    assert_equal "arbitrary/path", templates.first.virtual_path
+    assert_equal [:html],          templates.first.formats
+  end
+end