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<?php
/**
* Test: Nette\Utils\Iterables::mapWithKeys()
*/
declare(strict_types=1);
use Nette\Utils\Iterables;
use Tester\Assert;
require __DIR__ . '/../bootstrap.php';
test('empty iterable', function () {
$arr = new ArrayIterator([]);
$log = [];
$res = Iterables::mapWithKeys(
$arr,
function ($v, $k, $arr) use (&$log) {
$log[] = func_get_args();
return [];
},
);
Assert::same([], iterator_to_array($res));
Assert::same([], $log);
});
test('non-empty iterable', function () {
$arr = new ArrayIterator(['x' => 'a', 'y' => 'b']);
$log = [];
$res = Iterables::mapWithKeys(
$arr,
function ($v, $k, $arr) use (&$log) {
$log[] = func_get_args();
return ["_$k", "_$v"];
},
);
Assert::same(['_x' => '_a', '_y' => '_b'], iterator_to_array($res));
Assert::same([['a', 'x', $arr], ['b', 'y', $arr]], $log);
});
test('skipped elements', function () {
$arr = new ArrayIterator(['x' => 'a', 'y' => 'b', 'z' => 'c']);
$res = Iterables::mapWithKeys(
$arr,
fn($v, $k) => $k === 'y' ? null : ["_$k", "_$v"],
);
Assert::same(['_x' => '_a', '_z' => '_c'], iterator_to_array($res));
});
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