Throws ArgumentError, if given template does not exist

lib/zero/renderer.rb

@@ -121,11 +121,13 @@ module Zero
     # @param types [Array] the types for the template
     # @return [Tilt::Template] a prepared tilt template
     def template(name, types)
-      types.each do |type|
-        template = templates[name][type]
-        unless template.nil?
-          return template if template.kind_of?(Tilt::Template)
-          return Tilt.new(template)
+      if templates.has_key? name
+        types.each do |type|
+          template = templates[name][type]
+          unless template.nil?
+            return template if template.kind_of?(Tilt::Template)
+            return Tilt.new(template)
+          end
         end
       end
       raise ArgumentError.new "No template found for '#{name}'!"

spec/unit/renderer/render_spec.rb

@@ -31,4 +31,10 @@ describe Zero::Renderer, '#render' do
   it 'renders json content' do
     subject.render('index', json_types, binding).should match("{text: 'success'}")
   end
+
+  it 'returns an ArgumentError, if given template does not exist' do
+    expect {
+      subject.render('foobar', html_types, binding)
+    }.to raise_error(ArgumentError, "No template found for 'foobar'!")
+  end
 end