[TASK] Add some more tests for parsing comments

tests/RuleSet/DeclarationBlockTest.php

@@ -428,4 +428,26 @@ public function orderOfElementsMatchingOriginalOrderAfterExpandingShorthands():
             \array_map('strval', $lastDeclarationBlock->getRulesAssoc())
         );
     }
+
+    /**
+     * @return array<string, array{0: non-empty-string, 1: non-empty-string}>
+     */
+    public static function declarationBlocksWithCommentsProvider(): array
+    {
+        return [
+            'CSS comments with one asterisk' => ['p {color: #000;/* black */}', 'p {color: #000;}'],
+            'CSS comments with two asterisks' => ['p {color: #000;/** black */}', 'p {color: #000;}'],
+        ];
+    }
+
+    /**
+     * @test
+     * @dataProvider declarationBlocksWithCommentsProvider
+     */
+    public function removesCommentsFromRules(string $cssWithComments, string $cssWithoutComments): void
+    {
+        $document = (new Parser($cssWithComments))->parse();
+
+        self::assertSame($cssWithoutComments, $document->render());
+    }
 }