Add regression test

Author: herndlm

tests/Type/WebMozartAssert/ImpossibleCheckTypeMethodCallRuleTest.php

@@ -47,6 +47,11 @@ public function testExtension(): void
 		]);
 	}
 
+	public function testBug33(): void
+	{
+		$this->analyse([__DIR__ . '/data/bug-33.php'], []);
+	}
+
 	public function testBug68(): void
 	{
 		$this->analyse([__DIR__ . '/data/bug-68.php'], []);

tests/Type/WebMozartAssert/data/bug-33.php

@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace WebmozartAssertBug33;
+
+use Webmozart\Assert\Assert;
+
+class Bug33
+{
+
+	public function foo(?string $bar)
+	{
+		Assert::nullOrStringNotEmpty($bar);
+	}
+
+}