Lithium Docs

						public function testMethodFiltering() {
		$class = 'lithium\tests\mocks\core\MockStaticMethodFiltering';

		$result = $class::method(array('Starting test'));
		$expected = array(
			'Starting test',
			'Starting outer method call',
			'Inside method implementation of ' . $class,
			'Ending outer method call'
		);
		$this->assertEqual($expected, $result);

		$class::applyFilter('method', function($self, $params, $chain) {
			$params['data'][] = 'Starting filter';
			$result = $chain->next($self, $params, $chain);
			$result[] = 'Ending filter';
			return $result;
		});

		$result = $class::method(array('Starting test'));
		$expected = array(
			'Starting test',
			'Starting outer method call',
			'Starting filter',
			'Inside method implementation of ' . $class,
			'Ending filter',
			'Ending outer method call'
		);
		$this->assertEqual($expected, $result);

		$class::applyFilter('method', function($self, $params, $chain) {
			$params['data'][] = 'Starting inner filter';
			$result = $chain->next($self, $params, $chain);
			$result[] = 'Ending inner filter';
			return $result;
		});
		$result = $class::method(array('Starting test'));
		$expected = array(
			'Starting test',
			'Starting outer method call',
			'Starting filter',
			'Starting inner filter',
			'Inside method implementation of ' . $class,
			'Ending inner filter',
			'Ending filter',
			'Ending outer method call'
		);
		$this->assertEqual($expected, $result);
	}