public function testConstructor()
 {
     $token = new UsernamePasswordToken('foo', 'bar');
     $this->assertFalse($token->isAuthenticated());
     $token = new UsernamePasswordToken('foo', 'bar', array('ROLE_FOO'));
     $this->assertEquals(array(new Role('ROLE_FOO')), $token->getRoles());
     $this->assertTrue($token->isAuthenticated());
 }