Opis\Colibri\Test\CommonTest::testClosureUseReturnClosure PHP Method

    public function testClosureUseReturnClosure()
    {
        $a = function ($p) {
            return $p + 1;
        };
        $b = function ($p) use($a) {
            return $a($p);
        };
        $v = 1;
        $u = $this->s($b);
        $this->assertEquals($v + 1, $u(1));
    }