Jyxo\Spl\FilterIteratorTest::testIterator PHP Метод

    public function testIterator()
    {
        $data = range(0, 10);
        $callback = function ($value) {
            return 0 == $value % 2;
        };
        $iterator = new FilterIterator(new \ArrayIterator($data), $callback);
        $expected = [0 => 0, 2 => 2, 4 => 4, 6 => 6, 8 => 8, 10 => 10];
        $results = [];
        foreach ($iterator as $key => $value) {
            $results[$key] = $value;
        }
        $this->assertSame($expected, $results);
        $this->assertSame($expected, $iterator->toArray());
    }