Improved: Moves groovy scripts to src and adds a package declaration to

all of them (OFBIZ-12813)

Replaces UtilValidate.isNotEmpty() by Groovy Truth

applications/accounting/src/test/groovy/org/apache/accounting/accounting/InvoicePerShipmentTests.groovy

@@ -18,7 +18,6 @@
  */
 package org.apache.accounting.accounting
 
-import org.apache.ofbiz.base.util.UtilValidate
 import org.apache.ofbiz.entity.GenericValue
 import org.apache.ofbiz.order.shoppingcart.CheckOutEvents
 import org.apache.ofbiz.order.shoppingcart.ShoppingCartEvents
@@ -47,7 +46,7 @@ class InvoicePerShipmentTests extends OFBizTestCase {
  Step 4) Check invoice should not created.
  */
  List invoices = testInvoicePerShipment('GZ-1000', 'N')
- assert UtilValidate.isEmpty(invoices)
+ assert invoices
  }
 
  void testInvoicePerShipmentSetTrue() {
@@ -58,7 +57,7 @@ class InvoicePerShipmentTests extends OFBizTestCase {
  Step 4) Check invoice should be created.
  */
  List invoices = testInvoicePerShipment('GZ-1000', 'Y')
- assert UtilValidate.isNotEmpty(invoices)
+ assert !invoices
  }
 
  void testInvoicePerShipmentSetOrderFalse() {
@@ -68,7 +67,7 @@ class InvoicePerShipmentTests extends OFBizTestCase {
  Step 3) Check invoice should not be created.
  */
  List invoices = testInvoicePerShipment('GZ-2644', 'N')
- assert UtilValidate.isEmpty(invoices)
+ assert invoices
  }
 
  void testInvoicePerShipmentSetOrderTrue() {
@@ -78,7 +77,7 @@ class InvoicePerShipmentTests extends OFBizTestCase {
  Step 3) Check invoice should be created.
  */
  List invoices = testInvoicePerShipment('GZ-2644', 'Y')
- assert UtilValidate.isNotEmpty(invoices)
+ assert !invoices
  }
 
  private List testInvoicePerShipment(String productId, String invoicePerShipment) {