Fix build

Author: tvdijen

src/XMLSchema/Type/Helper/XPathValue.php

@@ -23,7 +23,7 @@ protected function validateValue(string $content): void
     {
         $dom = new Dom\XPath(DOMDocumentFactory::create());
 
-        $result = $dom->evaluate($content);
-        Assert::isInstanceOf($result, Dom\NodeList::class);
+        $result = @$dom->evaluate($content);
+        Assert::isInstanceOf($result, Dom\NodeList::class, \RuntimeException::class);
     }
 }

tests/XMLSchema/Type/Helper/XPathValueTest.php

@@ -4,6 +4,7 @@
 
 namespace SimpleSAML\Test\XMLSchema\Type\Builtin;
 
+use Error;
 use PHPUnit\Framework\Attributes\CoversClass;
 use PHPUnit\Framework\Attributes\DataProvider;
 use PHPUnit\Framework\TestCase;
@@ -28,7 +29,7 @@ public function testString(bool $shouldPass, string $xpath): void
         try {
             $value = XPathValue::fromString($xpath);
             $this->assertTrue($shouldPass);
-        } catch (AssertionFailedException $e) {
+        } catch (Error) {
             $this->assertFalse($shouldPass);
         }
     }