Add price field test

spec/models/spree/price_spec.rb

@@ -16,5 +16,13 @@ module Spree
         expect(price.reload.variant).to eq variant
       end
     end
+
+    context "with large values" do
+      let(:expensive_variant) { build(:variant, price: 10_000_000) }
+
+      it "throws an error" do
+        expect{ expensive_variant.save }.to raise_error ActiveRecord::StatementInvalid
+      end
+    end
   end
 end