public function testValidationFailure()
 {
     $data = array('index' => '', 'query' => '');
     $this->assertInstanceOf('Application\\Model\\Entity\\Search', $this->entity->exchangeArray($data));
     $this->assertFalse($this->entity->isValid());
     $this->assertNotEmpty($this->entity->getErrorMessages());
     $this->assertEquals(2, count($this->entity->getErrorMessages()['errors']));
 }