Merge pull request #224 from dlanner/return_enumerator_from_each_row_…

…streaming

Return an enumerator when calling each_row_streaming without a block

lib/roo/excelx.rb

@@ -321,7 +321,12 @@ def comments(sheet = nil)
     # Yield an array of Excelx::Cell
     # Takes options for sheet, pad_cells, and max_rows
     def each_row_streaming(options = {})
-      sheet_for(options.delete(:sheet)).each_row(options) { |row| yield row }
+      sheet = sheet_for(options.delete(:sheet))
+      if block_given?
+        sheet.each_row(options) { |row| yield row }
+      else
+        sheet.to_enum(:each_row, options)
+      end
     end
 
     private

spec/lib/roo/excelx_spec.rb

@@ -447,5 +447,11 @@
         expect(index).to eq 4
       end
     end
+
+    context 'without block passed' do
+      it 'returns an enumerator' do
+        expect(subject.each_row_streaming).to be_a(Enumerator)
+      end
+    end
   end
 end