iter\IterFnTest::testIndex PHP Method

    public function testIndex()
    {
        $getIndex3 = fn\index(3);
        $getIndexTest = fn\index('test');
        $arr1 = [10, 11, 12, 13, 14, 15];
        $arr2 = ['foo' => 'bar', 'test' => 'tset', 'bar' => 'foo'];
        $this->assertSame($arr1[3], $getIndex3($arr1));
        $this->assertSame($arr2['test'], $getIndexTest($arr2));
    }