add withdrawl and deposit to FiatBalance and Balance

spec/models/admin_user_spec.rb

@@ -1,25 +0,0 @@
-# frozen_string_literal: true
-
-# == Schema Information
-#
-# Table name: admin_users
-#
-#  id                     :bigint           not null, primary key
-#  email                  :string           default(""), not null
-#  encrypted_password     :string           default(""), not null
-#  remember_created_at    :datetime
-#  reset_password_sent_at :datetime
-#  reset_password_token   :string
-#  created_at             :datetime         not null
-#  updated_at             :datetime         not null
-#
-# Indexes
-#
-#  index_admin_users_on_email                 (email) UNIQUE
-#  index_admin_users_on_reset_password_token  (reset_password_token) UNIQUE
-#
-require "rails_helper"
-
-RSpec.describe(AdminUser, type: :model) do
-  pending "add some examples to (or delete) #{__FILE__}"
-end

spec/models/balance_spec.rb

@@ -32,4 +32,32 @@ RSpec.describe(Balance, type: :model) do
     it { is_expected.to(belong_to(:user)) }
     it { is_expected.to(belong_to(:currency)) }
   end
+
+  describe ".withdrwal!" do
+    context "when value is greater than the balance" do
+      it "raise ActiveRecord::RecordInvalid" do
+        balance = build(:balance, amount: 70.342)
+
+        expect { balance.withdrawal!(80) }.to(
+          raise_error(ActiveRecord::RecordInvalid, "A validação falhou: Quantia saldo insuficiente")
+        )
+      end
+    end
+
+    context "when value is equals to the balance" do
+      it "returns true" do
+        balance = build(:balance, amount: 70.342)
+
+        expect(balance.withdrawal!(70.342)).to(eq(true))
+      end
+    end
+
+    context "when value is smaller than the balance" do
+      it "returns true" do
+        balance = build(:balance, amount: 70.342)
+
+        expect(balance.withdrawal!(20)).to(eq(true))
+      end
+    end
+  end
 end

spec/models/fiat_balance_spec.rb

@@ -25,4 +25,32 @@ RSpec.describe(FiatBalance, type: :model) do
   describe "associations" do
     it { is_expected.to(belong_to(:user)) }
   end
+
+  describe ".withdrwal!" do
+    context "when value is greater than the balance" do
+      it "raise ActiveRecord::RecordInvalid" do
+        balance = build(:fiat_balance, amount_cents: 100_00)
+
+        expect { balance.withdrawal!(100_50) }.to(
+          raise_error(ActiveRecord::RecordInvalid, "A validação falhou: Quantia saldo insuficiente")
+        )
+      end
+    end
+
+    context "when value is equals to the balance" do
+      it "returns true" do
+        balance = build(:fiat_balance, amount_cents: 100_00)
+
+        expect(balance.withdrawal!(100_00)).to(eq(true))
+      end
+    end
+
+    context "when value is smaller than the balance" do
+      it "returns true" do
+        balance = build(:fiat_balance, amount_cents: 100_00)
+
+        expect(balance.withdrawal!(90_00)).to(eq(true))
+      end
+    end
+  end
 end