Add better document test for error handling switches

Author: theseer

tests/document/DocumentTest.php

@@ -21,6 +21,7 @@
 use PHPUnit\Framework\TestCase;
 use Templado\Engine\Example\ViewModel;
 use Throwable;
+use function libxml_use_internal_errors;
 
 #[CoversClass(Document::class)]
 #[UsesClass(Id::class)]
@@ -50,6 +51,14 @@ public function testCanBeConstructedFromString(): void {
         );
     }
 
+    public function testUsageEnablesLibxmlInternalErrorHandler(): void {
+        libxml_use_internal_errors(false);
+
+        Document::fromString('<?xml version="1.0" ?><root />');
+
+        $this->assertTrue(libxml_use_internal_errors());
+    }
+
     public function testCanBeConstructFromDomDocument(): void {
         $dom = new DOMDocument();
         $dom->loadXML('<?xml version="1.0" ?><root />');
@@ -93,7 +102,6 @@ public function testExistingLibxmlErrorStateGetsClearedOnConstruct(): void {
         libxml_use_internal_errors(true);
         $dummy = new DOMDocument();
         $dummy->loadXML('parsing-this-will-cause-libxml-errors');
-        libxml_use_internal_errors(false);
 
         $this->assertInstanceOf(
             Document::class,