fixed credit when no payment_profiles_supported

app/models/spree/billing_integration/paypal_express_base.rb

@@ -26,11 +26,12 @@ class Spree::BillingIntegration::PaypalExpressBase < Spree::BillingIntegration
     end
   end
 
-  def credit(amount, account, response_code, gateway_options)
+  def credit(*args)
+    amount = args.shift
+    response_code = args.first.is_a?(String) ? args.first : args[1]
     provider.credit(amount, response_code, :currency => preferred_currency)
   end
 
-
   def find_authorization(payment)
     logs = payment.log_entries.all(:order => 'created_at DESC')
     logs.each do |log|

spec/models/billing_integration/paypal_express_base_spec.rb

@@ -105,4 +105,31 @@ describe Spree::BillingIntegration::PaypalExpressBase do
      end
   end
 
+  describe "#credit" do
+    before { payment.stub :response_code => '123' }
+    context "when payment_profiles_supported = true" do
+      before { gateway.stub :payment_profiles_supported? => true }
+
+
+      it "should receive correct params" do
+        provider.should_receive(:credit).with(1000, '123', :currency => 'EUR').and_return(success_response)
+        payment.credit!(10.0)
+        payment.response_code.should == '123'
+      end
+    end
+
+    context "when payment_profiles_supported = false" do
+      before do
+        payment.stub :response_code => '123'
+        gateway.stub :payment_profiles_supported? => false
+      end
+
+      it "should receive correct params" do
+        provider.should_receive(:credit).with(amount_in_cents, '123', :currency => 'EUR').and_return(success_response)
+        payment.credit!(10.0)
+        payment.response_code.should == '123'
+      end
+
+    end
+  end
 end