Revert "Remove crashing test"

This reverts commit 2424d76.

tests/Unit/PHPStan/Lib/TypeNarrowerTest.php

@@ -0,0 +1,24 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DR\Utils\Tests\Unit\PHPStan\Lib;
+
+use DR\Utils\PHPStan\Lib\TypeNarrower;
+use PhpParser\Node\Arg;
+use PhpParser\Node\Expr;
+use PHPStan\PhpDoc\TypeStringResolver;
+use PHPUnit\Framework\Attributes\CoversClass;
+use PHPUnit\Framework\TestCase;
+
+#[CoversClass(TypeNarrower::class)]
+class TypeNarrowerTest extends TestCase
+{
+    public function testGetTypesFromStringArray(): void
+    {
+        $arg = new Arg($this->createMock(Expr::class));
+
+        $narrower = new TypeNarrower($this->createMock(TypeStringResolver::class));
+        static::assertSame([], $narrower->getTypesFromStringArray($arg));
+    }
+}