Allow form groups to accept system arguments

.changeset/hip-deers-rhyme.md

@@ -0,0 +1,5 @@
+---
+'@primer/view-components': minor
+---
+
+Allow form groups to accept system arguments

app/lib/primer/forms/base_component.rb

@@ -61,14 +61,6 @@ def compile_and_render_template
         self.class.compile! unless self.class.instance_methods(false).include?(:render_template)
         render_template
       end
-
-      def content_tag_if(condition, tag, **kwargs, &block)
-        if condition
-          content_tag(tag, **kwargs, &block)
-        else
-          capture(&block)
-        end
-      end
     end
   end
 end

app/lib/primer/forms/group.html.erb

@@ -1,4 +1,4 @@
-<%= content_tag_if(horizontal?, :div, class: "FormControl-horizontalGroup") do %>
+<%= render(Primer::Box.new(**@system_arguments)) do %>
   <% @inputs.each do |input| %>
     <%= render(input.to_component) %>
   <% end %>

app/lib/primer/forms/group.rb

@@ -17,6 +17,11 @@ def initialize(inputs:, builder:, form:, layout: DEFAULT_LAYOUT, **system_argume
         @form = form
         @layout = layout
         @system_arguments = system_arguments
+
+        @system_arguments[:classes] = class_names(
+          @system_arguments.delete(:classes),
+          "FormControl-horizontalGroup" => horizontal?
+        )
       end
 
       def horizontal?

test/lib/primer/forms/group_input_test.rb

@@ -0,0 +1,22 @@
+# frozen_string_literal: true
+
+require "lib/test_helper"
+
+class Primer::Forms::GroupInputTest < Minitest::Test
+  include Primer::ComponentTestHelpers
+
+  def test_group_accepts_system_arguments
+    render_in_view_context do
+      primer_form_with(url: "/foo") do |f|
+        render_inline_form(f) do |sys_args_form|
+          sys_args_form.group(layout: :horizontal, border: true, p: 1) do |group|
+            group.text_field(name: :first_name, label: "First name")
+            group.text_field(name: :last_name, label: "Last name")
+          end
+        end
+      end
+    end
+
+    assert_selector ".FormControl-horizontalGroup.border.p-1"
+  end
+end

test/lib/primer/forms_test.rb

@@ -297,12 +297,6 @@ def test_text_field_custom_element_is_form_control
     assert_selector "primer-text-field.FormControl"
   end
 
-  def test_siblings_are_form_controls_when_including_a_multi_input
-    render_preview :multi_input_form
-
-    assert_selector ".FormControl-radio-group-wrap + .FormControl"
-  end
-
   def test_toggle_switch_button_labelled_by_label
     render_preview(:example_toggle_switch_form)