fix(view): check the existing of the $tagName property (#803)

Author: yassiNebeL

src/Tempest/View/src/Elements/ElementFactory.php

@@ -12,6 +12,7 @@
 use Tempest\View\Renderers\TempestViewCompiler;
 use Tempest\View\ViewComponent;
 use Tempest\View\ViewConfig;
+use const XML_ELEMENT_NODE;
 use function Tempest\Support\str;
 
 final class ElementFactory
@@ -51,7 +52,11 @@ private function makeElement(Node $node, ?Element $parent): ?Element
             );
         }
 
-        $tagName = $node->tagName ? strtolower($node->tagName) : null;
+        $tagName = null;
+
+        if ($node->nodeType == XML_ELEMENT_NODE) {
+            $tagName = strtolower($node->tagName);
+        }
 
         $attributes = [];
 

tests/Integration/View/TempestViewRendererTest.php

@@ -418,4 +418,26 @@ public function test_view_component_with_multiple_attributes(): void
         $html = $this->render(view('<x-view-component-with-multiple-attributes :a="\'a\'" b="b"></x-view-component-with-multiple-attributes>'));
         $this->assertStringEqualsStringIgnoringLineEndings($expected, $html);
     }
+
+    public function test_slot_with_comment(): void
+    {
+        $this->assertSame(
+            <<<'HTML'
+            <div class="base">
+                
+            
+                Test
+            
+            </div>
+            HTML,
+            $this->render(
+                <<<'HTML'
+                <x-base-layout>
+                    <!-- example of comment -->
+                    Test
+                </x-base-layout>
+                HTML,
+            ),
+        );
+    }
 }