Introduce helpers for static constructors

composer.json

@@ -40,7 +40,10 @@
     "autoload": {
         "psr-4": {
             "loophp\\collection\\": "./src/"
-        }
+        },
+        "files": [
+            "src/Utils/helpers.php"
+        ]
     },
     "autoload-dev": {
         "psr-4": {

spec/loophp/collection/CollectionSpec.php

@@ -29,6 +29,7 @@
 use PhpSpec\ObjectBehavior;
 use stdClass;
 use function gettype;
+use function loophp\collection\Utils\collectIterable;
 use const INF;
 use const PHP_EOL;
 use const PHP_VERSION_ID;
@@ -37,6 +38,13 @@ class CollectionSpec extends ObjectBehavior
 {
     private const PHP_8 = 80_000;
 
+    public function getMatchers(): array
+    {
+        return [
+            'beSameAs' => static fn (CollectionInterface $subject, CollectionInterface $expected): bool => $subject->same($expected),
+        ];
+    }
+
     public function it_can_all(): void
     {
         $this::fromIterable([1, 2, 3])
@@ -438,6 +446,13 @@ public function it_can_be_constructed_with_an_arrayObject(): void
         $this->shouldImplement(Collection::class);
     }
 
+    public function it_can_be_constructed_with_collectIterable(): void
+    {
+        $input = [1, 2, 3];
+
+        $this::fromIterable($input)->shouldBeSameAs(collectIterable($input));
+    }
+
     public function it_can_be_instantiated_with_withClosure(): void
     {
         $fibonacci = static function ($start, $inc) {

src/Utils/helpers.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 loophp\collection\Utils;
+
+use loophp\collection\Collection;
+use loophp\collection\Contract\Collection as CollectionInterface;
+
+use function function_exists;
+
+if (!function_exists('collectIterable')) {
+    /**
+     * @pure
+     *
+     * @template TKey
+     * @template T
+     *
+     * @param iterable<TKey, T> $iterable
+     *
+     * @return CollectionInterface<TKey, T>
+     */
+    function collectIterable(iterable $iterable): CollectionInterface
+    {
+        return Collection::fromIterable($iterable);
+    }
+}