[FIX-1554] fixture_file_upload cannot find files

fix as review

Author: Laurent Cobos

lib/rspec/rails.rb

@@ -9,6 +9,7 @@
 require 'rspec/rails/view_rendering'
 require 'rspec/rails/matchers'
 require 'rspec/rails/fixture_support'
+require 'rspec/rails/fixture_file_upload_support'
 require 'rspec/rails/file_fixture_support'
 require 'rspec/rails/example'
 require 'rspec/rails/vendor/capybara'

lib/rspec/rails/configuration.rb

@@ -84,6 +84,9 @@ def self.initialize_configuration(config)
         config.add_setting :file_fixture_path, :default => 'spec/fixtures/files'
         config.include RSpec::Rails::FileFixtureSupport
       end
+
+      config.include RSpec::Rails::FixtureFileUploadSupport
+
       # This allows us to expose `render_views` as a config option even though it
       # breaks the convention of other options by using `render_views` as a
       # command (i.e. `render_views = true`), where it would normally be used

lib/rspec/rails/fixture_file_upload_support.rb

@@ -0,0 +1,39 @@
+module RSpec
+  module Rails
+    # @private
+    module FixtureFileUploadSupport
+      extend ActiveSupport::Concern
+
+      included do
+        delegate :fixture_file_upload, :to => :rails_test_wrapper
+      end
+
+    private
+
+      def rails_test_wrapper
+        resolved_fixture_path = (fixture_path || RSpec.configuration.fixture_path || '')
+        RailsFixtureFileWrapper.fixture_path = File.join(resolved_fixture_path, '')
+        RailsFixtureFileWrapper.instance
+      end
+
+      class RailsFixtureFileWrapper
+        class << self
+          attr_reader :fixture_path
+
+          # Get the instance of wrapper
+          def instance
+            @instance ||= new
+          end
+
+          if defined?(ActionDispatch::TestProcess)
+            include ActionDispatch::TestProcess
+
+            # Rails 3.0..3.1 are using ActionController::TestCase to resolve fixture_path
+            # see https://apidock.com/rails/v3.0.0/ActionDispatch/TestProcess/fixture_file_upload
+            include ActionController::TestCase
+          end
+        end
+      end
+    end
+  end
+end

spec/rspec/rails/fixture_file_upload_support_spec.rb

@@ -0,0 +1,32 @@
+require 'spec_helper'
+
+module RSpec::Rails
+  describe FixtureFileUploadSupport do
+    context 'with fixture path set in config' do
+      before { RSpec.configuration.fixture_path = File.dirname(__FILE__) }
+
+      it 'resolves fixture file' do
+        expect(fixture_file_upload_resolved.run).to be true
+      end
+    end
+
+    context 'with fixture path set in spec' do
+      it 'resolves fixture file' do
+        expect(fixture_file_upload_resolved(File.dirname(__FILE__)).run).to be true
+      end
+    end
+
+    def fixture_file_upload_resolved(fixture_path = nil)
+      RSpec::Core::ExampleGroup.describe do
+        include RSpec::Rails::FixtureFileUploadSupport
+
+        self.fixture_path = fixture_path if fixture_path
+
+        it 'supports fixture file upload' do
+          file = fixture_file_upload(File.basename(__FILE__))
+          expect(file.read).to match(/describe FixtureFileUploadSupport/im)
+        end
+      end
+    end
+  end
+end