iter\IterTest::testReindex PHP Method

    public function testReindex()
    {
        $iter = reindex('strtoupper', ['a', 'b', 'c', 'd', 'e']);
        $this->assertSame(['A' => 'a', 'B' => 'b', 'C' => 'c', 'D' => 'd', 'E' => 'e'], toArrayWithKeys($iter));
        $iter = reindex(fn\operator('*', 2), [1, 2, 3, 4]);
        $this->assertSame([2 => 1, 4 => 2, 6 => 3, 8 => 4], toArrayWithKeys($iter));
    }