add stake orders list

spec/models/stake_order_spec.rb

@@ -0,0 +1,34 @@
+# frozen_string_literal: true
+
+# == Schema Information
+#
+# Table name: stake_orders
+#
+#  id         :bigint           not null, primary key
+#  amount     :decimal(20, 10)  default(0.0), not null
+#  pool_name  :string           not null
+#  status     :string           not null
+#  created_at :datetime         not null
+#  updated_at :datetime         not null
+#  user_id    :bigint           not null
+#
+# Indexes
+#
+#  index_stake_orders_on_user_id  (user_id)
+#
+# Foreign Keys
+#
+#  fk_rails_...  (user_id => users.id)
+#
+require "rails_helper"
+
+RSpec.describe(StakeOrder, type: :model) do
+  describe "validations" do
+    it { is_expected.to(validate_presence_of(:pool_name)) }
+    it { is_expected.to(validate_presence_of(:amount)) }
+  end
+
+  describe "associations" do
+    it { is_expected.to(belong_to(:user)) }
+  end
+end