Add support for rendering with block instead of partial

fixtures/my_app/frontend/components/no_template/no_template.js

@@ -0,0 +1 @@
+import "./no_template.scss";

fixtures/my_app/frontend/components/no_template/no_template.scss

@@ -0,0 +1,2 @@
+.no-template {
+}

fixtures/my_app/frontend/components/no_template/no_template_component.rb

@@ -0,0 +1,9 @@
+module NoTemplateComponent
+  extend ComponentHelper
+
+  render do |block|
+    content_tag :div, class: "no-template #{@additional_class}" do
+      block.call
+    end
+  end
+end

lib/komponent/component_helper.rb

@@ -10,4 +10,10 @@ def property(name, options = {})
   def self.extended(component)
     component.properties = {}
   end
+
+  def render(&block)
+    @render_block = block
+  end
+
+  attr_reader :render_block
 end

lib/komponent/component_renderer.rb

@@ -76,7 +76,11 @@ def _render(component, locals = {}, options = {}, &block)
         define_singleton_method(:block_given_to_component) { block }
       end
 
-      @context.render("components/#{component}/#{parts.join('_')}", &block)
+      if component_module.respond_to?(:render_block) && component_module.render_block
+        @context.instance_exec(block, &component_module.render_block)
+      else
+        @context.render("components/#{component}/#{parts.join('_')}", &block)
+      end
     end
 
     def resolved_component_path(component)

test/komponent/component_test.rb

@@ -7,7 +7,7 @@ def test_all_returns_components
     all = Komponent::Component.all
 
     assert all.is_a?(Hash)
-    assert_equal all.count, 13
+    assert_equal all.count, 14
     assert all["foo"].is_a?(Komponent::Component)
   end
 

test/komponent/komponent_helper_test.rb

@@ -88,6 +88,7 @@ def test_helper_lists_components
         'genius_button',
         'hello',
         'namespaced/button',
+        'no_template',
         'partial/universe',
         'partial/universe_button',
         'ping',
@@ -108,4 +109,10 @@ def test_helper_renders_with_doc
 }</code></pre>),
       component_with_doc('all', world: "🌎", sunglasses: "😎").chomp
   end
+
+  def test_helper_renders_without_template
+    assert_equal \
+      %(<div class="no-template classy">🌎</div>),
+      component('no_template', additional_class: "classy") { "🌎" }.chomp
+  end
 end