Avoid returning the same InvoiceID (a.o.) for all payments from get_p…

…ayments

lib/xero_gateway/payment.rb

@@ -30,10 +30,10 @@ def self.from_xml(payment_element)
           when 'Reference'      then payment.reference = element.text
           when 'CurrencyRate'   then payment.currency_rate = BigDecimal(element.text)
           when 'Invoice'
-            payment.invoice_id = element.elements["//InvoiceID"].text
-            payment.invoice_number = element.elements["//InvoiceNumber"].text
+            payment.invoice_id = element.elements["InvoiceID"].text
+            payment.invoice_number = element.elements["InvoiceNumber"].text
           when 'IsReconciled'   then payment.reconciled = (element.text == "true")
-          when 'Account'        then payment.account_id = element.elements["//AccountID"].text
+          when 'Account'        then payment.account_id = element.elements["AccountID"].text
         end
       end
       payment

test/integration/get_payments_test.rb

@@ -27,6 +27,13 @@ def test_get_payments
     assert_kind_of(XeroGateway::Payment, payment.first)
   end
 
+  def test_get_payments_gets_actual_invoice_ids
+    result = @gateway.get_payments
+    assert_not_equal result.payments[0].invoice_id, result.payments[1].invoice_id
+    # assert_equal result.payments[0].invoice_id, 'b0875d8b-ff26-4ce8-8aea-6955492ead48'
+    # assert_equal result.payments[1].invoice_id, '33c8d757-2db0-48a2-8daa-f54768fabeb1'
+  end
+
   def test_get_payments_modified_since_date
     # Create a test payment
     @gateway.create_payment(create_test_payment)