add BuyCryptoOrder and SellCryptoOrder entities

spec/models/buy_crypto_order_spec.rb

@@ -0,0 +1,56 @@
+# frozen_string_literal: true
+
+# == Schema Information
+#
+# Table name: buy_crypto_orders
+#
+#  id                :bigint           not null, primary key
+#  paid_amount_cents :integer          default(0), not null
+#  received_amount   :decimal(20, 10)
+#  status            :string           not null
+#  created_at        :datetime         not null
+#  updated_at        :datetime         not null
+#  currency_id       :bigint           not null
+#  user_id           :bigint           not null
+#
+# Indexes
+#
+#  index_buy_crypto_orders_on_currency_id  (currency_id)
+#  index_buy_crypto_orders_on_user_id      (user_id)
+#
+# Foreign Keys
+#
+#  fk_rails_...  (currency_id => currencies.id)
+#  fk_rails_...  (user_id => users.id)
+#
+require "rails_helper"
+
+RSpec.describe(BuyCryptoOrder, type: :model) do
+  describe "validations" do
+    context "when status is `processing`" do
+      subject { build(:buy_crypto_order, status: :processing) }
+
+      it { is_expected.to(validate_presence_of(:paid_amount_cents)) }
+      it { is_expected.not_to(validate_presence_of(:received_amount)) }
+    end
+
+    context "when status is `completed`" do
+      subject { build(:buy_crypto_order, status: :completed) }
+
+      it { is_expected.to(validate_presence_of(:paid_amount_cents)) }
+      it { is_expected.to(validate_presence_of(:received_amount)) }
+    end
+
+    context "when status is `canceled`" do
+      subject { build(:buy_crypto_order, status: :canceled) }
+
+      it { is_expected.to(validate_presence_of(:paid_amount_cents)) }
+      it { is_expected.not_to(validate_presence_of(:received_amount)) }
+    end
+  end
+
+  describe "associations" do
+    it { is_expected.to(belong_to(:user)) }
+    it { is_expected.to(belong_to(:currency)) }
+  end
+end

spec/models/sell_crypto_order_spec.rb

@@ -0,0 +1,56 @@
+# frozen_string_literal: true
+
+# == Schema Information
+#
+# Table name: sell_crypto_orders
+#
+#  id                    :bigint           not null, primary key
+#  paid_amount           :decimal(20, 10)  default(0.0), not null
+#  received_amount_cents :integer
+#  status                :string           not null
+#  created_at            :datetime         not null
+#  updated_at            :datetime         not null
+#  currency_id           :bigint           not null
+#  user_id               :bigint           not null
+#
+# Indexes
+#
+#  index_sell_crypto_orders_on_currency_id  (currency_id)
+#  index_sell_crypto_orders_on_user_id      (user_id)
+#
+# Foreign Keys
+#
+#  fk_rails_...  (currency_id => currencies.id)
+#  fk_rails_...  (user_id => users.id)
+#
+require "rails_helper"
+
+RSpec.describe(SellCryptoOrder, type: :model) do
+  describe "validations" do
+    context "when status is `processing`" do
+      subject { build(:sell_crypto_order, status: :processing) }
+
+      it { is_expected.to(validate_presence_of(:paid_amount)) }
+      it { is_expected.not_to(validate_presence_of(:received_amount_cents)) }
+    end
+
+    context "when status is `completed`" do
+      subject { build(:sell_crypto_order, status: :completed) }
+
+      it { is_expected.to(validate_presence_of(:paid_amount)) }
+      it { is_expected.to(validate_presence_of(:received_amount_cents)) }
+    end
+
+    context "when status is `canceled`" do
+      subject { build(:sell_crypto_order, status: :canceled) }
+
+      it { is_expected.to(validate_presence_of(:paid_amount)) }
+      it { is_expected.not_to(validate_presence_of(:received_amount_cents)) }
+    end
+  end
+
+  describe "associations" do
+    it { is_expected.to(belong_to(:user)) }
+    it { is_expected.to(belong_to(:currency)) }
+  end
+end