Inital commit after splitting from project

tests/ZipTest.php

@@ -0,0 +1,73 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tez\Utils\Tests\Arr;
+
+use PHPUnit\Framework\TestCase;
+use Tez\Utils\Arr\Zip;
+
+final class ZipTest extends TestCase
+{
+    public function testZipEqualLengthArrays(): void
+    {
+        $result = Zip::zip([1, 2, 3], ['a', 'b', 'c']);
+
+        self::assertSame([[1, 'a'], [2, 'b'], [3, 'c']], $result);
+    }
+
+    public function testZipPadsShorterArrayWithNull(): void
+    {
+        $result = Zip::zip([1, 2, 3], ['a', 'b']);
+
+        self::assertSame([[1, 'a'], [2, 'b'], [3, null]], $result);
+    }
+
+    public function testZipThreeArrays(): void
+    {
+        $result = Zip::zip([1, 2], ['a', 'b'], [true, false]);
+
+        self::assertSame([[1, 'a', true], [2, 'b', false]], $result);
+    }
+
+    public function testZipNoArraysReturnsEmpty(): void
+    {
+        self::assertSame([], Zip::zip());
+    }
+
+    public function testZipEmptyArraysReturnEmpty(): void
+    {
+        self::assertSame([], Zip::zip([], []));
+    }
+
+    public function testShortestStopsAtSmallest(): void
+    {
+        $result = Zip::shortest([1, 2, 3], ['a', 'b']);
+
+        self::assertSame([[1, 'a'], [2, 'b']], $result);
+    }
+
+    public function testShortestWithEqualLengths(): void
+    {
+        $result = Zip::shortest([1, 2], ['a', 'b']);
+
+        self::assertSame([[1, 'a'], [2, 'b']], $result);
+    }
+
+    public function testShortestWithEmptyArrayReturnsEmpty(): void
+    {
+        self::assertSame([], Zip::shortest([1, 2, 3], []));
+    }
+
+    public function testShortestNoArraysReturnsEmpty(): void
+    {
+        self::assertSame([], Zip::shortest());
+    }
+
+    public function testZipStripsAssociativeKeys(): void
+    {
+        $result = Zip::zip(['a' => 1, 'b' => 2], ['x' => 10, 'y' => 20]);
+
+        self::assertSame([[1, 10], [2, 20]], $result);
+    }
+}