feat: Add NormalizeIteratorAggregate.

src/NormalizeIteratorAggregate.php

@@ -0,0 +1,46 @@
+<?php
+
+/**
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace loophp\iterators;
+
+use Generator;
+use IteratorAggregate;
+use Traversable;
+
+/**
+ * @template TKey
+ * @template T
+ *
+ * @implements IteratorAggregate<int, T>
+ */
+final class NormalizeIteratorAggregate implements IteratorAggregate
+{
+    /**
+     * @var iterable<TKey, T>
+     */
+    private iterable $iterable;
+
+    /**
+     * @param iterable<TKey, T> $iterable
+     */
+    public function __construct(iterable $iterable)
+    {
+        $this->iterable = $iterable;
+    }
+
+    /**
+     * @return Generator<int, T>
+     */
+    public function getIterator(): Traversable
+    {
+        foreach ($this->iterable as $c) {
+            yield $c;
+        }
+    }
+}

tests/unit/NormalizeIteratorAggregateTest.php

@@ -0,0 +1,32 @@
+<?php
+
+/**
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace tests\loophp\iterators;
+
+use loophp\iterators\NormalizeIteratorAggregate;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * @internal
+ * @coversDefaultClass \loophp\iterators
+ */
+final class NormalizeIteratorAggregateTest extends TestCase
+{
+    public function testBasic(): void
+    {
+        $input = static function () {
+            yield from array_combine(range('a', 'c'), range('a', 'c'));
+        };
+
+        $iterator = new NormalizeIteratorAggregate($input());
+
+        $expected = ['a', 'b', 'c'];
+        self::assertSame($expected, iterator_to_array($iterator));
+    }
+}