/**
  * try to get a PurchaseInvoice
  */
 public function testSearchPurchaseInvoice()
 {
     $purchase = $this->_createPurchaseInvoice();
     // search & check
     $search = $this->_json->searchPurchaseInvoices($this->_getFilter(), $this->_getPaging());
     $this->assertEquals($purchase['number'], $search['results'][0]['number']);
     $this->assertEquals(1, $search['totalcount']);
 }