closes #151

# Conflicts:
#	CHANGELOG.md

Author: catmando

lib/react/component/tags.rb

@@ -94,13 +94,20 @@ def find_name_and_parent(component)
       private
 
       def find_component(name)
-        scopes = "#{self.class.name}".split('::').inject([Module]) do |nesting, next_const|
+        component = lookup_const(name)
+        if component && !component.method_defined?(:render)
+          raise "#{name} does not appear to be a react component."
+        end
+        component
+      end
+
+      def lookup_const(name)
+        return nil unless name =~ /^[A-Z]/
+        scopes = self.class.name.to_s.split('::').inject([Module]) do |nesting, next_const|
           nesting + [nesting.last.const_get(next_const)]
         end.reverse
-        scope = scopes.detect { |s| s.const_defined?(name) } || return
-        component = scope.const_get(name)
-        return component if component.method_defined?(:render)
-        raise "#{name} does not appear to be a react component."
+        scope = scopes.detect { |s| s.const_defined?(name) }
+        scope.const_get(name) if scope
       end
     end
   end

spec/react/dsl_spec.rb

@@ -148,6 +148,18 @@ def render
       .to raise_error('Comp does not appear to be a react component.')
   end
 
+  it 'raises a method missing error' do
+    stub_const 'Foo', Class.new(React::Component::Base)
+    Foo.class_eval do
+      backtrace :none
+      render do
+        _undefined_method
+      end
+    end
+    expect { React.render_to_static_markup(React.create_element(Foo)) }
+      .to raise_error(NoMethodError)
+  end
+
   it "will treat the component class name as a first class component name" do
     stub_const 'Mod::Bar', Class.new
     Mod::Bar.class_eval do