public function test_addFieldsMapping()
 {
     /** === Test Data === */
     $mCollection = $this->_mock(\Magento\Customer\Model\ResourceModel\Grid\Collection::class);
     /** === Setup Mocks === */
     // $collection->addFilterToMap($fieldAlias, $fieldFullName);
     $mCollection->shouldReceive('addFilterToMap')->times(4);
     /** === Call and asserts  === */
     $this->obj->addFieldsMapping($mCollection);
 }
 public function test_addFieldsMapping()
 {
     /** === Test Data === */
     $COLLECTION = $this->_mock(\Magento\Sales\Model\ResourceModel\Order\Grid\Collection::class);
     /** === Setup Mocks === */
     // $collection->addFilterToMap($fieldAlias, $fieldFullName);
     $COLLECTION->shouldReceive('addFilterToMap')->once()->with('prxgt_pv_total', 'prxgtPvSales.total');
     // $collection->addFilterToMap($fieldAlias, $fieldFullName);
     $COLLECTION->shouldReceive('addFilterToMap')->once()->with('prxgt_pv_discount', 'prxgtPvSales.discount');
     // $collection->addFilterToMap($fieldAlias, $fieldFullName);
     $COLLECTION->shouldReceive('addFilterToMap')->once()->with('prxgt_pv_subtotal', 'prxgtPvSales.subtotal');
     /** === Call and asserts  === */
     $this->obj->addFieldsMapping($COLLECTION);
 }