lithium\tests\cases\util\SetTest::testExtractSingle PHP Method

    public function testExtractSingle()
    {
        $single = array('User' => array('id' => 4, 'name' => 'Neo'));
        $expected = array(4);
        $result = Set::extract($single, '/User/id');
        $this->assertEqual($expected, $result);
    }