/**
* @depends testReduceSkipsInitialValueIfNoneGiven
*/
public function testReduceCanUseArrayKeysInCallback()
{
$xao = new XArray(['a' => 1, 'b' => 2, 'c' => 3]);
// this would return 0 if the default initial value of NULL gets paased
$string = $xao->reduce(function ($carry, $value, $key) {
return $carry .= $key . ':' . $value . '|';
}, '|');
$this->assertSame('|a:1|b:2|c:3|', $string);
}
