Dynamic object name in test helper

README.md

@@ -410,6 +410,29 @@ end
 
 For more complex components, we recommend the [`rspec-html-matchers` gem](https://github.com/kucaahbe/rspec-html-matchers).
 
+### Minitest
+
+#### Configuration
+
+```rb
+  # test/test_helper.rb
+  ViewComponent::TestCase.include(ViewComponent::Form::TestHelpers)
+```
+
+#### Example
+
+```rb
+test "renders a text field" do
+  object = User.new # replace with a model of your choice
+  form = form_with(object)
+  options = {}
+
+  render_inline(described_class.new(form, object_name, :first_name, options))
+
+  assert_selector "input[type=text][name='user[first_name]'][id='user_first_name']"
+end
+```
+
 ## Development
 
 After checking out the repo, run `bin/setup` to install dependencies. Then, run `rake spec` to run the tests. You can also run `bin/console` for an interactive prompt that will allow you to experiment.

lib/view_component/form/test_helpers.rb

@@ -8,13 +8,15 @@ module ViewComponent
   module Form
     module TestHelpers
       def form_with(object, builder: ViewComponent::Form::Builder, **options)
+        object_name = if object.class.respond_to?(:model_name)
+          object.class.model_name.param_key
+        else
+          :user
+        end
+
         builder.new(object_name, object, template, options)
       end
 
-      def object_name
-        :user
-      end
-
       if Gem::Version.new(Rails::VERSION::STRING) >= Gem::Version.new("6.1")
         def template
           lookup_context = ActionView::LookupContext.new(ActionController::Base.view_paths)