[TASK] Use Declaration::getPropertyName() in tests

This method replaces `getRule()`, which is deprecated as of #1506.

Author: JakeQZ

src/RuleSet/RuleSet.php

@@ -101,7 +101,7 @@ public static function parseRuleSet(ParserState $parserState, RuleSet $ruleSet):
      */
     public function addRule(Declaration $declarationToAdd, ?Declaration $sibling = null): void
     {
-        $propertyName = $declarationToAdd->getRule();
+        $propertyName = $declarationToAdd->getPropertyName();
         if (!isset($this->declarations[$propertyName])) {
             $this->declarations[$propertyName] = [];
         }
@@ -240,7 +240,7 @@ public function getRulesAssoc(?string $searchPattern = null): array
         /** @var array<string, Declaration> $result */
         $result = [];
         foreach ($this->getRules($searchPattern) as $declaration) {
-            $result[$declaration->getRule()] = $declaration;
+            $result[$declaration->getPropertyName()] = $declaration;
         }
 
         return $result;
@@ -251,7 +251,7 @@ public function getRulesAssoc(?string $searchPattern = null): array
      */
     public function removeRule(Declaration $declarationToRemove): void
     {
-        $nameOfPropertyToRemove = $declarationToRemove->getRule();
+        $nameOfPropertyToRemove = $declarationToRemove->getPropertyName();
         if (!isset($this->declarations[$nameOfPropertyToRemove])) {
             return;
         }

tests/ParserTest.php

@@ -344,8 +344,8 @@ public function ruleGetters(): void
         $bodyBlock = $declarationBlocks[1];
         $backgroundHeaderRules = $headerBlock->getRules('background-');
         self::assertCount(2, $backgroundHeaderRules);
-        self::assertSame('background-color', $backgroundHeaderRules[0]->getRule());
-        self::assertSame('background-color', $backgroundHeaderRules[1]->getRule());
+        self::assertSame('background-color', $backgroundHeaderRules[0]->getPropertyName());
+        self::assertSame('background-color', $backgroundHeaderRules[1]->getPropertyName());
         $backgroundHeaderRules = $headerBlock->getRulesAssoc('background-');
         self::assertCount(1, $backgroundHeaderRules);
         self::assertInstanceOf(Color::class, $backgroundHeaderRules['background-color']->getValue());
@@ -886,7 +886,7 @@ public function missingPropertyValueLenient(): void
         $rules = $block->getRules();
         self::assertCount(1, $rules);
         $rule = $rules[0];
-        self::assertSame('display', $rule->getRule());
+        self::assertSame('display', $rule->getPropertyName());
         self::assertSame('inline-block', $rule->getValue());
     }
 

tests/RuleSet/DeclarationBlockTest.php

@@ -36,7 +36,7 @@ public function overrideRules(): void
 
         $rules = $wrapper->getRules();
         self::assertCount(1, $rules);
-        self::assertSame('right', $rules[0]->getRule());
+        self::assertSame('right', $rules[0]->getPropertyName());
         self::assertSame('-10px', $rules[0]->getValue());
     }