Add minimum specs

spec/dummy/app/admin/posts.rb

@@ -1,4 +1,49 @@
 # frozen_string_literal: true
 
 ActiveAdmin.register Post do
+  permit_params :author_id, :title, :description, :category, :dt, :position, :published, tag_ids: []
+
+  index do
+    selectable_column
+    id_column
+    column :title
+    column :author
+    column :published
+    column :created_at
+    actions
+  end
+
+  show do
+    attributes_table do
+      row :author
+      row :title
+      row :description
+      row :category
+      row :dt
+      row :position
+      row :published
+      row :tags
+      row :created_at
+      row :updated_at
+    end
+    active_admin_comments
+  end
+
+  form do |f|
+    f.inputs 'Post' do
+      f.input :author
+      f.input :title
+      f.input :description, as: :quill_editor
+      f.input :category
+      f.input :dt
+      f.input :position
+      f.input :published
+    end
+
+    f.inputs 'Tags' do
+      f.input :tags
+    end
+
+    f.actions
+  end
 end

spec/dummy/app/assets/javascripts/active_admin.js

@@ -1 +1,4 @@
 //= require active_admin/base
+
+//= require activeadmin/quill_editor/quill
+//= require activeadmin/quill_editor_input

spec/dummy/app/assets/stylesheets/active_admin.scss

@@ -8,8 +8,10 @@
 // $sidebar-width: 242px;
 
 // Active Admin's got SASS!
-@import "active_admin/mixins";
+@import 'active_admin/mixins';
-@import "active_admin/base";
+@import 'active_admin/base';
+
+@import 'activeadmin/quill_editor_input';
 
 // Overriding any non-variable SASS must be done after the fact.
 // For example, to change the default status-tag color:

spec/system/quill_editor_spec.rb

@@ -0,0 +1,28 @@
+# frozen_string_literal: true
+
+RSpec.describe 'Quill editor', type: :system do
+  let(:author) { Author.create!(email: 'some_email@example.com', name: 'John Doe', age: 30) }
+  let(:post) { Post.create!(title: 'Test', author: author, description: 'Some content...') }
+
+  before do
+    post
+  end
+
+  after do
+    post.destroy
+    author.destroy
+  end
+
+  context 'with a Quill editor' do
+    it 'updates some HTML content' do
+      visit "/admin/posts/#{post.id}/edit"
+
+      expect(page).to have_css('#post_description_input .ql-editor', text: 'Some content...')
+      find('#post_description_input .ql-editor').base.send_keys('more text')
+
+      find('[type="submit"]').click
+      expect(page).to have_content('was successfully updated')
+      expect(post.reload.description).to eq '<p>Some content...more text</p>'
+    end
+  end
+end