Added ePay gateway.

app/models/spree/gateway/epay.rb

@@ -0,0 +1,10 @@
+module Spree
+  class Gateway::Epay < Gateway
+    preference :login, :string
+    preference :password, :string
+
+    def provider_class
+      ActiveMerchant::Billing::EpayGateway
+    end
+  end
+end

lib/spree_gateway/engine.rb

@@ -15,6 +15,7 @@ class Engine < Rails::Engine
       app.config.spree.payment_methods << Spree::Gateway::CardSave
       app.config.spree.payment_methods << Spree::Gateway::CyberSource
       app.config.spree.payment_methods << Spree::Gateway::DataCash
+      app.config.spree.payment_methods << Spree::Gateway::Epay
       app.config.spree.payment_methods << Spree::Gateway::Eway
       app.config.spree.payment_methods << Spree::Gateway::Linkpoint
       app.config.spree.payment_methods << Spree::Gateway::Maxipago

spec/models/gateway/epay_spec.rb

@@ -0,0 +1,11 @@
+require 'spec_helper'
+
+describe Spree::Gateway::Epay do
+  let(:gateway) { described_class.create!(name: 'Epay') }
+
+  context '.provider_class' do
+    it 'is a Epay gateway' do
+      expect(gateway.provider_class).to eq ::ActiveMerchant::Billing::EpayGateway
+    end
+  end
+end