Implement #link_to_remove_nested_value helper in ActionView::Cocoon for handling value objects, analogous to Cocoon's #link_to_remove_association.

Author: tbsmatt

lib/value_objects/action_view/cocoon.rb

@@ -4,6 +4,17 @@ module ValueObjects
   module ActionView
 
     module Cocoon
+
+      def link_to_remove_nested_value(name, html_options = {}, &block)
+        wrapper_class = html_options.delete(:wrapper_class)
+
+        html_options[:class] = [html_options[:class], 'remove_fields dynamic'].compact.join(' ')
+        html_options[:'data-wrapper-class'] = wrapper_class if wrapper_class
+
+        name = capture(&block) if block_given?
+        content_tag(:a, name, html_options)
+      end
+
     end
 
   end

spec/value_objects/action_view/cocoon_spec.rb

@@ -0,0 +1,95 @@
+load 'value_objects/action_view/cocoon.rb' # this module is dynamically loaded
+
+RSpec.describe ValueObjects::ActionView::Cocoon do
+
+  class TestView < ActionView::Base
+  end
+
+  let(:test_view) { TestView.new }
+  let(:body) { Nokogiri::HTML(html).at('body') }
+  let(:link) { body.at('a') }
+  let(:link_text) { link.text }
+  let(:link_href) { link.attribute('href')&.value }
+  let(:link_class) { link.attribute('class')&.value }
+  let(:link_wrapper_class) { link.attribute('data-wrapper-class')&.value }
+
+  describe '#link_to_remove_nested_value' do
+
+    shared_examples_for 'link_to_remove' do |options|
+
+      it 'renders the link correctly' do
+        aggregate_failures do
+          expect(body.children).to contain_exactly(link)
+          expect(link_text).to eq(options[:text])
+          expect(link_class).to eq(options[:class])
+          expect(link_wrapper_class).to eq(options[:wrapper_class])
+          expect(link_href).to eq(nil)
+        end
+      end
+
+    end
+
+    let(:html) { test_view.link_to_remove_nested_value(*args, &block) }
+    let(:args) { [name] + [options].compact }
+    let(:name) { nil }
+    let(:options) { nil }
+    let(:block) { nil }
+
+    include_examples 'link_to_remove', text: '', class: 'remove_fields dynamic'
+
+    context 'with name' do
+
+      let(:name) { 'Some text ...' }
+
+      include_examples 'link_to_remove', text: 'Some text ...', class: 'remove_fields dynamic'
+
+      context 'and block' do
+
+        let(:block) { -> { 'Block text' } }
+
+        include_examples 'link_to_remove', text: 'Block text', class: 'remove_fields dynamic'
+
+      end
+
+    end
+
+    context 'with class' do
+
+      let(:options) { { class: classes } }
+      let(:classes) { 'foo bar' }
+
+      include_examples 'link_to_remove', text: '', class: 'foo bar remove_fields dynamic'
+
+      context 'as an array' do
+
+        let(:classes) { %w( foo bar ) }
+
+        include_examples 'link_to_remove', text: '', class: 'foo bar remove_fields dynamic'
+
+      end
+
+    end
+
+    context 'with wrapper_class' do
+
+      let(:options) { { wrapper_class: 'sub-fields' } }
+
+      include_examples 'link_to_remove', text: '', class: 'remove_fields dynamic', wrapper_class: 'sub-fields'
+
+    end
+
+    context 'with all args' do
+
+      let(:name) { 'text' }
+      let(:options) { { class: 'bar foo', wrapper_class: 'fields' } }
+
+      include_examples 'link_to_remove', text: 'text', class: 'bar foo remove_fields dynamic', wrapper_class: 'fields'
+
+    end
+
+  end
+
+end
+
+# cleanup to avoid interfering with other specs
+ValueObjects::ActionView.send(:remove_const, :Cocoon)