Do not remove HTML attributes if components are not present

Closes #1096

lib/simple_form/form_builder.rb

@@ -131,14 +131,15 @@ module SimpleForm
     #        name="user[name]" type="text" value="Carlos" />
     #
     def input_field(attribute_name, options = {})
+      components = (wrapper.components.map(&:namespace) & ATTRIBUTE_COMPONENTS)
+
       options = options.dup
-      options[:input_html] = options.except(:as, :boolean_style, :collection, :label_method, :value_method, *ATTRIBUTE_COMPONENTS)
+      options[:input_html] = options.except(:as, :boolean_style, :collection, :label_method, :value_method, *components)
       options = @defaults.deep_dup.deep_merge(options) if @defaults
 
       input      = find_input(attribute_name, options)
       wrapper    = find_wrapper(input.input_type, options)
-      components = (wrapper.components.map(&:namespace) & ATTRIBUTE_COMPONENTS) + [:input]
-      components = components.map { |component| SimpleForm::Wrappers::Leaf.new(component) }
+      components = components.concat([:input]).map { |component| SimpleForm::Wrappers::Leaf.new(component) }
 
       SimpleForm::Wrappers::Root.new(components, wrapper.options.merge(wrapper: false)).render input
     end

test/form_builder/input_field_test.rb

@@ -146,4 +146,44 @@ class InputFieldTest < ActionView::TestCase
 
     assert_no_select 'input.boolean[boolean_style]'
   end
+
+  test 'build input_field without pattern component use the pattern string' do
+    swap_wrapper :default, self.custom_wrapper_with_html5_components do
+      with_concat_form_for(@user) do |f|
+        f.input_field :name, pattern: '\w+'
+      end
+
+      assert_select 'input[pattern="\w+"]'
+    end
+  end
+
+  test 'build input_field without placeholder component use the placeholder string' do
+    swap_wrapper :default, self.custom_wrapper_with_html5_components do
+      with_concat_form_for(@user) do |f|
+        f.input_field :name, placeholder: 'Placeholder'
+      end
+
+      assert_select 'input[placeholder="Placeholder"]'
+    end
+  end
+
+  test 'build input_field without maxlength component use the maxlength string' do
+    swap_wrapper :default, self.custom_wrapper_with_html5_components do
+      with_concat_form_for(@user) do |f|
+        f.input_field :name, maxlength: 5
+      end
+
+      assert_select 'input[maxlength="5"]'
+    end
+  end
+
+  test 'build input_field without readonly component use the readonly string' do
+    swap_wrapper :default, self.custom_wrapper_with_html5_components do
+      with_concat_form_for(@user) do |f|
+        f.input_field :name, readonly: true
+      end
+
+      assert_select 'input[readonly="readonly"]'
+    end
+  end
 end

test/support/misc_helpers.rb

@@ -178,6 +178,12 @@ module MiscHelpers
     end
   end
 
+  def custom_wrapper_with_html5_components
+    SimpleForm.build tag: :span, class: 'custom_wrapper' do |b|
+      b.use :label_text
+    end
+  end
+
   def custom_form_for(object, *args, &block)
     simple_form_for(object, *args, { builder: CustomFormBuilder }, &block)
   end