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<?php
/**
* Test: Nette\Utils\Iterables::memoize()
*/
declare(strict_types=1);
use Nette\Utils\Iterables;
use Tester\Assert;
require __DIR__ . '/../bootstrap.php';
function iterator(): Generator
{
yield 'a' => 'apple';
yield ['b'] => ['banana'];
yield 'c' => 'cherry';
}
test('iteration', function () {
$iterator = Iterables::memoize(iterator());
$pairs = [];
foreach ($iterator as $key => $value) {
$pairs[] = [$key, $value];
}
Assert::same(
[
['a', 'apple'],
[['b'], ['banana']],
['c', 'cherry'],
],
$pairs,
);
});
test('re-iteration', function () {
$iterator = Iterables::memoize(iterator());
foreach ($iterator as $value);
$pairs = [];
foreach ($iterator as $key => $value) {
$pairs[] = [$key, $value];
}
Assert::same(
[
['a', 'apple'],
[['b'], ['banana']],
['c', 'cherry'],
],
$pairs,
);
});
test('nested re-iteration', function () {
$iterator = Iterables::memoize(iterator());
$pairs = [];
foreach ($iterator as $key => $value) {
$pairs[] = [$key, $value];
foreach ($iterator as $value);
}
Assert::same(
[
['a', 'apple'],
[['b'], ['banana']],
['c', 'cherry'],
],
$pairs,
);
});
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