Fix bug

Author: tvdijen

src/QNameElementTrait.php

@@ -110,7 +110,7 @@ public static function fromXML(DOMElement $xml): static
         Assert::same($xml->namespaceURI, static::NS, InvalidDOMElementException::class);
 
         list($prefix, $localName) = self::parseQName($xml->textContent);
-        if ($localName === null) {
+        if ($prefix === null) {
             // We don't have a prefixed value here; use target namespace
             $namespace = $xml->lookupNamespaceUri(null);
         } else {

tests/XML/QNameElementTraitTest.php

@@ -83,4 +83,17 @@ public function testUnmarshalling(): void
         $this->assertEquals('env:Sender', $qnameElement->getContent());
         $this->assertEquals('http://www.w3.org/2003/05/soap-envelope', $qnameElement->getContentNamespaceUri());
     }
+
+
+    /**
+     */
+    public function testUnmarshallingNonNamepacedQualifiedName(): void
+    {
+        $qnameElement = QNameElement::fromXML(DOMDocumentFactory::fromString(
+            '<ssp:QNameElement xmlns:ssp="urn:x-simplesamlphp:namespace">Sender</ssp:QNameElement>'
+        )->documentElement);
+
+        $this->assertEquals('Sender', $qnameElement->getContent());
+        $this->assertNull($qnameElement->getContentNamespaceUri());
+    }
 }