public function testUserIsNotValid()
 {
     $this->setExpectedException('Symfony\\Component\\Validator\\Exception\\ConstraintDefinitionException');
     $user = $this->getMock('Foo\\Bar\\User');
     $encoderFactory = $this->getMock('Symfony\\Component\\Security\\Core\\Encoder\\EncoderFactoryInterface');
     $securityContext = $this->createSecurityContext($user);
     $validator = new UserPasswordValidator($securityContext, $encoderFactory);
     $validator->initialize($this->context);
     $validator->validate('secret', new UserPassword());
 }