Allow iteration of limit volume tracker entries

lib/rex/book/limit_volume_tracker.rb

@@ -1,6 +1,7 @@
 module Rex
   module Book
     class LimitVolumeTracker
+      include Enumerable
       LimitVolumeChange = Struct.new(:side, :price, :quantity)
 
       attr_reader :volumes
@@ -24,6 +25,18 @@ module Rex
         ]
       end
 
+      def each
+        volumes.each do |side, limits|
+          limits.each do |limit, volume|
+            yield LimitVolumeChange.new(
+              side ? :buy : :sell,
+              limit,
+              volume
+            )
+          end
+        end
+      end
+
       def remove_order(order)
         volumes[order.is_buy][order.price] -= order.remaining_quantity
 

spec/book/limit_volume_tracker_spec.rb

@@ -37,6 +37,22 @@ RSpec.describe Rex::Book::LimitVolumeTracker do
     end
   end
 
+  describe "#each" do
+    before do
+      instance.add_order(sell_order)
+    end
+
+    it "retuns all limit volumes" do
+      expect(instance.to_a).to eq([
+        Rex::Book::LimitVolumeTracker::LimitVolumeChange.new(
+          :sell,
+          100,
+          250
+        )
+      ])
+    end
+  end
+
   describe "#process_trade" do
     let(:trade) do
       Rex::Book::Trade.new(