Add voucher_type to voucher

And update related specs
voucher_type doesn't do anything for now.

app/models/voucher.rb

@@ -11,7 +11,20 @@ class Voucher < ApplicationRecord
            dependent: :nullify
 
   validates :code, presence: true, uniqueness: { scope: :enterprise_id }
-  validates :amount, presence: true, numericality: { greater_than: 0 }
+  validates :amount,
+            presence: true,
+            numericality: { greater_than: 0 },
+            if: ->(v) { v.voucher_type == FLAT_RATE }
+  validates :amount,
+            presence: true,
+            numericality: { greater_than: 0, less_than_or_equal_to: 100 },
+            if: ->(v) { v.voucher_type == PERCENTAGE_RATE }
+
+  FLAT_RATE = 'flat'.freeze
+  PERCENTAGE_RATE = 'percentage'.freeze
+  TYPES = [FLAT_RATE, PERCENTAGE_RATE].freeze
+
+  validates :voucher_type, inclusion: TYPES
 
   def display_value
     Spree::Money.new(amount)

db/migrate/20230508035306_add_type_to_vouchers.rb

@@ -0,0 +1,5 @@
+class AddTypeToVouchers < ActiveRecord::Migration[7.0]
+  def change
+    add_column :vouchers, :voucher_type, :string, limit: 255
+  end
+end

db/schema.rb

@@ -1185,6 +1185,7 @@
     t.bigint "enterprise_id"
     t.datetime "deleted_at", precision: nil
     t.decimal "amount", precision: 10, scale: 2, default: "0.0", null: false
+    t.string "voucher_type", limit: 255
     t.index ["code", "enterprise_id"], name: "index_vouchers_on_code_and_enterprise_id", unique: true
     t.index ["deleted_at"], name: "index_vouchers_on_deleted_at"
     t.index ["enterprise_id"], name: "index_vouchers_on_enterprise_id"

spec/factories/voucher_factory.rb

@@ -1,8 +1,15 @@
 # frozen_string_literal: true
 
 FactoryBot.define do
-  factory :voucher do
+  factory :voucher_flat_rate, class: Voucher do
     enterprise { build(:distributor_enterprise) }
+    voucher_type { Voucher::FLAT_RATE }
     amount { 15 }
   end
+
+  factory :voucher_percentage, class: Voucher do
+    enterprise { build(:distributor_enterprise) }
+    voucher_type { Voucher::PERCENTAGE_RATE }
+    amount { rand(1..100) }
+  end
 end

spec/models/spree/order_spec.rb

@@ -1449,7 +1449,7 @@ def advance_to_delivery_state(order)
   describe "#voucher_adjustments" do
     let(:distributor) { create(:distributor_enterprise) }
     let(:order) { create(:order, user: user, distributor: distributor) }
-    let(:voucher) { create(:voucher, code: 'new_code', enterprise: order.distributor) }
+    let(:voucher) { create(:voucher_flat_rate, code: 'new_code', enterprise: order.distributor) }
 
     context "when no voucher adjustment" do
       it 'returns an empty array' do

spec/models/voucher_spec.rb

@@ -11,15 +11,31 @@
   end
 
   describe 'validations' do
-    subject { build(:voucher, code: 'new_code', enterprise: enterprise) }
+    subject { build(:voucher_flat_rate, code: 'new_code', enterprise: enterprise) }
 
     it { is_expected.to validate_presence_of(:code) }
     it { is_expected.to validate_uniqueness_of(:code).scoped_to(:enterprise_id) }
     it { is_expected.to validate_presence_of(:amount) }
-    it { is_expected.to validate_numericality_of(:amount).is_greater_than(0) }
+    it { is_expected.to validate_inclusion_of(:voucher_type).in_array(Voucher::TYPES) }
+
+    context "when voucher_type is flat rate" do
+      it { is_expected.to validate_numericality_of(:amount).is_greater_than(0) }
+    end
+
+    context "when voucher_type is percentage rate" do
+      subject { build(:voucher_percentage, code: 'new_code', enterprise: enterprise) }
+
+      it do
+        is_expected.to validate_numericality_of(:amount)
+          .is_greater_than(0)
+          .is_less_than_or_equal_to(100)
+      end
+    end
   end
 
   describe '#compute_amount' do
+    subject { create(:voucher_flat_rate, code: 'new_code', enterprise: enterprise, amount: 10) }
+
     let(:order) { create(:order_with_totals) }
 
     context 'when order total is more than the voucher' do
@@ -42,7 +58,9 @@
   describe '#create_adjustment' do
     subject(:adjustment) { voucher.create_adjustment(voucher.code, order) }
 
-    let(:voucher) { create(:voucher, code: 'new_code', enterprise: enterprise, amount: 25) }
+    let(:voucher) do
+      create(:voucher_flat_rate, code: 'new_code', enterprise: enterprise, amount: 25)
+    end
     let(:order) { create(:order_with_line_items, line_items_count: 3, distributor: enterprise) }
 
     it 'includes an amount of 0' do

spec/requests/voucher_adjustments_spec.rb

@@ -19,7 +19,7 @@
     )
   end
   let(:shipping_method) { distributor.shipping_methods.first }
-  let(:voucher) { create(:voucher, code: 'some_code', enterprise: distributor) }
+  let(:voucher) { create(:voucher_flat_rate, code: 'some_code', enterprise: distributor) }
 
   before do
     order.update!(created_by: user)

spec/system/consumer/split_checkout_spec.rb

@@ -721,7 +721,7 @@
 
         context "with voucher available" do
           let!(:voucher) do
-            create(:voucher, code: 'some_code', enterprise: distributor, amount: 15)
+            create(:voucher_flat_rate, code: 'some_code', enterprise: distributor, amount: 15)
           end
 
           before do
@@ -1114,7 +1114,9 @@
       end
 
       describe "vouchers" do
-        let(:voucher) { create(:voucher, code: 'some_code', enterprise: distributor, amount: 6) }
+        let(:voucher) do
+          create(:voucher_flat_rate, code: 'some_code', enterprise: distributor, amount: 6)
+        end
 
         before do
           voucher.create_adjustment(voucher.code, order)