include module and complete test

Author: wied03

lib/react/opal/component/api.rb

@@ -2,7 +2,7 @@ module React
   module Component
     module API
       def self.included(base)
-        #base.include(::React::Children)
+        base.include(::React::PropsChildren)
       end
 
       def state

spec/opal/props_children_spec.rb

@@ -30,9 +30,9 @@ def render
         React.create_element(React::PropsChildren::TestComponent) { [React.create_element('a'), React.create_element('li')] }
       end
 
-      subject { React.render_to_string element }
+      subject { React.render_to_static_markup element }
 
-      it { is_expected.to eq 'foobar' }
+      it { is_expected.to eq '<span><span>we have 2 kids</span></span>' }
     end
 
     context "empty" do