added remove_file specs

.rubocop.yml

 
 
+
 AllCops:
+  TargetRubyVersion: 2.3
   Include:
 
     - '**/config.ru'

Gemfile

@@ -48,6 +48,10 @@ group :development, :test do
 end
 
 group :development do
+  gem 'guard-rubocop'
+end
+
+group :development do
   # Access an IRB console on exception pages or by using <%= console %> in views
   gem 'web-console', '~> 2.0'
 

Gemfile.lock

@@ -73,6 +73,9 @@ GEM
       guard (~> 2.1)
       guard-compat (~> 1.1)
       rspec (>= 2.99.0, < 4.0)
+    guard-rubocop (1.2.0)
+      guard (~> 2.0)
+      rubocop (~> 0.20)
     i18n (0.7.0)
     jbuilder (2.4.1)
       activesupport (>= 3.0.0, < 5.1)
@@ -223,6 +226,7 @@ DEPENDENCIES
   coffee-rails (~> 4.1.0)
   guard
   guard-rspec
+  guard-rubocop
   jbuilder (~> 2.0)
   jquery-rails
   rails (= 4.2.6)

Guardfile

@@ -70,3 +70,8 @@ guard :rspec, cmd: "bin/rspec" do
     Dir[File.join("**/#{m[1]}.feature")][0] || "spec/acceptance"
   end
 end
+
+guard :rubocop do
+  watch(%r{.+\.rb$})
+  watch(%r{(?:.+/)?\.rubocop\.yml$}) { |m| File.dirname(m[0]) }
+end

app/controllers/application_controller.rb

+# frozen_string_literal: true
+
 # application controller
 class ApplicationController < ActionController::Base
   # Prevent CSRF attacks by raising an exception.

app/controllers/db_files_controller.rb

+# frozen_string_literal: true
+
+# Controller for DbFiles
 class DbFilesController < ApplicationController
 end

app/controllers/db_folders_controller.rb

+# frozen_string_literal: true
+
+# Controller for DbFolders
 class DbFoldersController < ApplicationController
 end

app/controllers/db_streams_controller.rb

+# frozen_string_literal: true
+
+# controller for DbStreams
 class DbStreamsController < ApplicationController
 end

app/models/db_file.rb

+# frozen_string_literal: true
+
 # A file in the database, contains one or more Streams
 class DbFile < ActiveRecord::Base
   belongs_to :db_folder
   has_many :streams
+
+  def remove(db_service:)
+    db_service.remove_file(path)
+    destroy
+  end
 end

app/models/db_folder.rb

+# frozen_string_literal: true
+
 # a folder in the database, may contain one or more DbFiles as files
 # and one or more DbFolders as subfolders
 class DbFolder < ActiveRecord::Base

app/models/db_stream.rb

+# frozen_string_literal: true
+
 # a stream in the database, this is the lowest element
 # in the db hierarchy and contains actual data
 class DbStream < ActiveRecord::Base

config.ru

+# frozen_string_literal: true
 # This file is used by Rack-based servers to start the application.
 
 require ::File.expand_path('../config/environment', __FILE__)

db/migrate/20160516024809_add_path_to_db_files.rb

+class AddPathToDbFiles < ActiveRecord::Migration
+  def change
+    add_column :db_files, :path, :string
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20160516000545) do
+ActiveRecord::Schema.define(version: 20160516024809) do
 
   create_table "db_files", force: :cascade do |t|
     t.string   "name"
@@ -19,6 +19,7 @@ ActiveRecord::Schema.define(version: 20160516000545) do
     t.integer  "db_folder_id"
     t.datetime "created_at",   null: false
     t.datetime "updated_at",   null: false
+    t.string   "path"
   end
 
   create_table "db_folders", force: :cascade do |t|

spec/controllers/db_files_controller_spec.rb

+# frozen_string_literal: true
 require 'rails_helper'
 
 RSpec.describe DbFilesController, type: :controller do

spec/controllers/db_folders_controller_spec.rb

+# frozen_string_literal: true
 require 'rails_helper'
 
 RSpec.describe DbFoldersController, type: :controller do

spec/controllers/db_streams_controller_spec.rb

+# frozen_string_literal: true
 require 'rails_helper'
 
 RSpec.describe DbStreamsController, type: :controller do

spec/models/db_file_spec.rb

+# frozen_string_literal: true
 require 'rails_helper'
 
 RSpec.describe 'DbFile' do
@@ -7,4 +8,17 @@ RSpec.describe 'DbFile' do
     specify { expect(db_file).to respond_to(:description) }
     specify { expect(db_file).to respond_to(:streams) }
   end
+
+  describe 'remove' do
+    let(:db_file) { DbFile.create }
+    let(:db_service) { double(remove_file: true) }
+    it 'destroys itself' do
+      db_file.remove(db_service: db_service)
+      expect(db_file).to be_destroyed
+    end
+    it 'removes itself from the remote system using DbService' do
+      db_file.remove(db_service: db_service)
+      expect(db_service).to have_received(:remove_file)
+    end
+  end
 end

spec/models/db_folder_spec.rb

+# frozen_string_literal: true
 require 'rails_helper'
 
 RSpec.describe 'DbFolder' do

spec/models/db_stream_spec.rb

+# frozen_string_literal: true
 require 'rails_helper'
 
 RSpec.describe 'DbStream' do