Raise error when template is not found

lib/rabl-rails/renderer.rb

@@ -3,6 +3,8 @@ require 'rabl-rails/renderers/json'
 
 module RablRails
   module Renderer
+    class TemplateNotFound < StandardError; end
+    
     mattr_reader :view_path
     @@view_path = 'app/views'
 
@@ -71,6 +73,7 @@ module RablRails
       c.target_object = object
 
       t = c.lookup_context.find_template(template, [], false)
+      raise TemplateNotFound unless t
 
       Library.instance.get_rendered_template(t.source, c)
     end

test/render_test.rb

@@ -31,6 +31,10 @@ class RenderTest < ActiveSupport::TestCase
 
     assert_equal %q({"user":{"id":1,"name":"Marty"}}), RablRails.render(@user, 'show', view_path: @tmp_path)
   end
+  
+  test "raise error if template is not found" do
+    assert_raises(RablRails::Renderer::TemplateNotFound) { RablRails.render(@user, 'show') }
+  end
 
   test "handle path for extends" do
     File.open(@tmp_path + "extend.json.rabl", "w") do |f|