public function testNotEqualFilter()
 {
     $filter = new App_ListFilter_EqualFilter();
     $filter->setFieldName('fieldName1');
     $filter->setValue('value1');
     $filter->setInverted(true);
     $this->filterList->addFilter($filter);
     $result = $this->filterMapper->mapListFilters($this->filterList);
     $this->assertTrue(is_array($result), "Result is array");
     $this->assertArrayHasKey('fieldName1', $result);
     $this->assertEquals($result['fieldName1'], array('$ne' => 'value1'));
 }