Extract Settings from Product Import processor

This encapsulates the data structure used by the entry processor to
check various settings. It still requires a lot of work to move more
logic to this new class.

app/models/product_import/entry_processor.rb

@@ -198,12 +198,14 @@ module ProductImport
     end
 
     def assign_defaults(object, entry)
+      settings = Settings.new(@import_settings)
+
       # Assigns a default value for a specified field e.g. category='Vegetables', setting this value
       # either for all entries (overwrite_all), or only for those entries where the field was blank
       # in the spreadsheet (overwrite_empty), depending on selected import settings
-      return unless @import_settings.key?(:settings) && @import_settings[:settings][entry.supplier_id.to_s] && @import_settings[:settings][entry.supplier_id.to_s]['defaults']
+      return unless settings.defaults(entry)
 
-      @import_settings[:settings][entry.supplier_id.to_s]['defaults'].each do |attribute, setting|
+      settings.defaults(entry).each do |attribute, setting|
         next unless setting['active']
 
         case setting['mode']

app/models/product_import/settings.rb

@@ -0,0 +1,13 @@
+module ProductImport
+  class Settings
+    def initialize(import_settings)
+      @import_settings = import_settings
+    end
+
+    def defaults(entry)
+      @import_settings.key?(:settings) &&
+        @import_settings[:settings][entry.supplier_id.to_s] &&
+        @import_settings[:settings][entry.supplier_id.to_s]['defaults']
+    end
+  end
+end

spec/models/product_import/settings_spec.rb

@@ -0,0 +1,51 @@
+require 'spec_helper'
+
+describe ProductImport::Settings do
+  let(:settings) { described_class.new(import_settings) }
+
+  describe '#defaults' do
+    let(:entry) { instance_double(ProductImport::SpreadsheetEntry) }
+    let(:import_settings) { {} }
+
+    context 'when there are no settings' do
+      it 'returns false' do
+        expect(settings.defaults(entry)).to be_falsey
+      end
+    end
+
+    context 'when there are settings' do
+      let(:entry) do
+        instance_double(ProductImport::SpreadsheetEntry, supplier_id: 1)
+      end
+      let(:import_settings) { { settings: {} } }
+
+      context 'and there is no data for the specified entry' do
+        it 'returns a falsey' do
+          expect(settings.defaults(entry)).to be_falsey
+        end
+      end
+
+      context 'and there is data for the specified entry' do
+        context 'and it has no defaults' do
+          let(:import_settings) do
+            { settings: { '1' => { 'foo' => 'bar' } } }
+          end
+
+          it 'returns a falsey' do
+            expect(settings.defaults(entry)).to be_falsey
+          end
+        end
+
+        context 'and it has defaults' do
+          let(:import_settings) do
+            { settings: { '1' => { 'defaults' => 'default value' } } }
+          end
+
+          it 'returns a truthy' do
+            expect(settings.defaults(entry)).to eq('default value')
+          end
+        end
+      end
+    end
+  end
+end