public function testGetAttributeInputTypes()
 {
     $types = $this->_helper->getAttributeInputTypes();
     $this->assertArrayHasKey('multiselect', $types);
     $this->assertArrayHasKey('boolean', $types);
     foreach ($types as $type) {
         $this->assertInternalType('array', $type);
         $this->assertNotEmpty($type);
     }
     $this->assertNotEmpty($this->_helper->getAttributeInputTypes('multiselect'));
     $this->assertNotEmpty($this->_helper->getAttributeInputTypes('boolean'));
 }