added #setup_render test helper

Author: 23tux

lib/view_component/base.rb

@@ -141,6 +141,7 @@ def setup_render(view_context, &block)
       @__vc_render_in_block = block
 
       @view_context.instance_variable_set(:@virtual_path, virtual_path)
+      self
     end
 
     def perform_render

lib/view_component/test_helpers.rb

@@ -45,6 +45,10 @@ def render_inline(component, **args, &block)
       fragment
     end
 
+    def setup_render(component)
+      component.setup_render(vc_test_view_context)
+    end
+
     # Returns the view context used to render components in tests. Note that the view context
     # is reset after each call to `render_inline`.
     #

test/sandbox/test/rendering_test.rb

@@ -1345,8 +1345,7 @@ def test_i18n_in_render_hook
   end
 
   def test_render_lifecycle_hooks
-    component = I18nTestComponent.new
-    component.setup_render(vc_test_view_context)
+    component = setup_render(I18nTestComponent.new)
     assert_equal(component.message, I18n.t("rendering_test.i18n_test_component.message"))
   end
 end