Find empty attributes in querySelector (#58)

Author: chrishow

src/HTML5DOMDocument/Internal/QuerySelectors.php

@@ -143,6 +143,7 @@ private function internalQuerySelectorAll(string $selector, $preferredLimit = nu
                 $tagName = strlen($match[1]) > 0 ? strtolower($match[1]) : null;
                 $check = function ($element) use ($attributeSelectors) {
                     if ($element->attributes->length > 0) {
+                        $attributes = $element->getAttributes();
                         foreach ($attributeSelectors as $attributeSelector) {
                             $isMatch = false;
                             $attributeValue = $element->getAttribute($attributeSelector['name']);
@@ -188,6 +189,9 @@ private function internalQuerySelectorAll(string $selector, $preferredLimit = nu
                             } else {
                                 if ($attributeValue !== '') {
                                     $isMatch = true;
+                                } else {
+                                    $found = array_search($attributeSelector['name'], array_keys($attributes));
+                                    $isMatch = ($found !== FALSE);
                                 }
                             }
                             if (!$isMatch) {

tests/Test.php

@@ -344,7 +344,7 @@ public function testQuerySelector()
             . '<div id="text1" class="class1">text1</div>'
             . '<div>text2</div>'
             . '<div>'
-            . '<div class="text3 class1">text3</div>'
+            . '<div empty-attribute class="text3 class1">text3</div>'
             . '</div>'
             . '<my-custom-element class="text5 class1">text5</my-custom-element>'
             . '<span id="text4" class="class1 class2">text4</div>'
@@ -365,6 +365,7 @@ public function testQuerySelector()
         $this->assertTrue($dom->querySelectorAll('span[id="text4"]')->item(0)->innerHTML === 'text4');
         $this->assertTrue($dom->querySelectorAll('[id]')->item(0)->innerHTML === 'text1');
         $this->assertTrue($dom->querySelectorAll('[id]')->length === 2);
+        $this->assertTrue($dom->querySelectorAll('[empty-attribute]')->length === 1);
         $this->assertTrue($dom->querySelectorAll('span[id]')->item(0)->innerHTML === 'text4');
         $this->assertTrue($dom->querySelectorAll('span[data-other]')->length === 0);
         $this->assertTrue($dom->querySelectorAll('div#text4')->length === 0);