fix: type casting for ints and dates

https://jira.railsc.ru/browse/BPC-16113

lib/treasury/hash_serializer.rb

@@ -1,13 +1,23 @@
 module Treasury
   module HashSerializer
+    INT_PATTERN = /\A\d+\Z/.freeze
+    DATE_PATTERN = /\A[1,2][0-9]{3}-(?:0[1-9]|1[0-2])-(?:[0-2][1-9]|3[0-1])\Z/.freeze
+
     def deserialize(hash_string)
       return Hash.new if hash_string.blank?
 
       hash_data = hash_string
         .split(',')
         .map do |item|
           key, value = item.split(':')
-          [key, value.to_i]
+
+          if value =~ INT_PATTERN
+            [key, value.to_i]
+          elsif value =~ DATE_PATTERN
+            [key, value.to_date]
+          else
+            [key, value]
+          end
         end
 
       Hash[hash_data]

spec/lib/treasury/fields/hash_operations_spec.rb

@@ -8,15 +8,35 @@
 
   describe "#value_as_hash" do
     let(:value_as_hash) { hash_field_class.value_as_hash(object: 123, field: :count) }
-    let(:value) { '10:100,20:200' }
-
     before do
       allow(hash_field_class).to receive(:value).and_return(value)
     end
 
-    it do
-      expect(hash_field_class).to receive(:init_accessor).with(object: 123, field: :count)
-      expect(value_as_hash).to eq('10' => 100, '20' => 200)
+    context 'when values is ints' do
+      let(:value) { '10:100,20:200' }
+
+      it do
+        expect(hash_field_class).to receive(:init_accessor).with(object: 123, field: :count)
+        expect(value_as_hash).to eq('10' => 100, '20' => 200)
+      end
+    end
+
+    context 'when values is dates' do
+      let(:value) { '10:2019-12-31,20:1999-10-01' }
+
+      it do
+        expect(hash_field_class).to receive(:init_accessor).with(object: 123, field: :count)
+        expect(value_as_hash).to eq('10' => Date.parse('2019-12-31'), '20' => Date.parse('1999-10-01'))
+      end
+    end
+
+    context 'when values is strings' do
+      let(:value) { '10:8888-12-31,20:foobar' }
+
+      it do
+        expect(hash_field_class).to receive(:init_accessor).with(object: 123, field: :count)
+        expect(value_as_hash).to eq('10' => '8888-12-31', '20' => 'foobar')
+      end
     end
   end
 end