public function testRemove() {
$bag = new ParameterBag(array(
'foo' => 'bar',
));
$bag
->add(array(
'bar' => 'bas',
));
$this
->assertEquals(array(
'foo' => 'bar',
'bar' => 'bas',
), $bag
->all());
$bag
->remove('bar');
$this
->assertEquals(array(
'foo' => 'bar',
), $bag
->all());
}