/**
* Test the offsetUnset method.
*
* @return void
*
* @since 1.0
*/
public function testOffsetUnset()
{
// No exception.
unset($this->instance['foo']);
$this->instance['foo'] = 'bar';
unset($this->instance['foo']);
$this->assertFalse($this->instance->hasArgument('foo'));
}