/**
* Tests the keymap() method.
*/
public function testKeymap()
{
$source = [];
foreach (range(ord('a'), ord('z')) as $value) {
$source[] = chr($value);
}
$traversable = new \ArrayIterator($source);
$closure = function ($value) {
return chr(ord('z') + ord('a') - ord($value));
};
$mapped = ArrayUtil::keymap($traversable, $closure);
$this->assertSame(array_combine(array_reverse($source), $source), $mapped);
$mapped = ArrayUtil::keymap($traversable, $closure, $closure);
$this->assertSame(array_reverse(array_combine($source, $source)), $mapped);
}
