public function testPeek() {
$this
->assertEquals(array(), $this->bag
->peek('non_existing'));
$this
->assertEquals(array(
'default',
), $this->bag
->peek('not_existing', array(
'default',
)));
$this
->assertEquals(array(
'A previous flash message',
), $this->bag
->peek('notice'));
$this
->assertEquals(array(
'A previous flash message',
), $this->bag
->peek('notice'));
}