Added a method helper for image specs to DRY code

Commit History:
Changed file name to represent module name
Removed unnecessary line breaks

core/spec/lib/search/base_spec.rb

@@ -4,6 +4,7 @@
 require 'spree/core/product_filters'
 
 RSpec.describe Spree::Core::Search::Base do
+  include ImageSpecHelper
   before do
     include Spree::Core::ProductFilters
     @taxon = create(:taxon, name: "Ruby on Rails")
@@ -22,7 +23,7 @@
 
   context "when include_images is included in the initialization params" do
     let(:params) { { include_images: true, keyword: @product1.name, taxon: @taxon.id } }
-    let(:image_file) { File.open(File.join('lib', 'spree', 'testing_support', 'fixtures', 'blank.jpg')) }
+    let(:image_file) { open_image('blank.jpg') }
     subject { described_class.new(params).retrieve_products }
 
     before do

core/spec/models/spree/image_spec.rb

@@ -3,26 +3,25 @@
 require 'rails_helper'
 
 RSpec.describe Spree::Image, type: :model do
+  include ImageSpecHelper
   it_behaves_like 'an attachment' do
     subject { create(:image) }
     let(:attachment_name) { :attachment }
     let(:default_style) { :product }
   end
 
   it 'is valid when attachment has allowed content type' do
-    image = build(:image,
-                  attachment: File.open(File.join('lib', 'spree', 'testing_support', 'fixtures', 'blank.jpg')))
+    image = build(:image, attachment: open_image('blank.jpg'))
     expect(image).to be_valid
   end
 
   it 'is not valid when attachment has restricted content type' do
-    image = build(:image,
-                  attachment: File.open(File.join('lib', 'spree', 'testing_support', 'fixtures', 'file.txt')))
+    image = build(:image, attachment: open_image('file.txt'))
     expect(image).to_not be_valid
   end
 
   describe 'attachment details' do
-    let(:image_file) { File.open(File.join('lib', 'spree', 'testing_support', 'fixtures', 'blank.jpg')) }
+    let(:image_file) { open_image('blank.jpg') }
     subject { create(:image, attachment: image_file) }
 
     it 'returns if attachment is present' do

core/spec/support/image_spec_helper.rb

@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+module ImageSpecHelper
+  def open_image(image)
+    File.open(File.join('lib', 'spree', 'testing_support', 'fixtures', image))
+  end
+end

core/spec/support/shared_examples/attachment.rb

@@ -1,11 +1,12 @@
 # frozen_string_literal: true
 
 RSpec.shared_examples 'an attachment' do
+  include ImageSpecHelper
   context 'valid attachment' do
     before do
       subject.send(
         :"#{attachment_name}=",
-        File.open(File.join('lib', 'spree', 'testing_support', 'fixtures', 'blank.jpg'))
+        open_image('blank.jpg')
       )
     end