OverridingConstantRule - check visibility

Author: ondrejmirtes

src/Rules/Constants/OverridingConstantRule.php

@@ -74,6 +74,27 @@ private function processSingleConstant(ClassReflection $classReflection, string
 			))->nonIgnorable()->build();
 		}
 
+		if ($prototype->isPublic()) {
+			if (!$constantReflection->isPublic()) {
+				$errors[] = RuleErrorBuilder::message(sprintf(
+					'%s constant %s::%s overriding public constant %s::%s should also be public.',
+					$constantReflection->isPrivate() ? 'Private' : 'Protected',
+					$constantReflection->getDeclaringClass()->getDisplayName(),
+					$constantReflection->getName(),
+					$prototype->getDeclaringClass()->getDisplayName(),
+					$prototype->getName()
+				))->nonIgnorable()->build();
+			}
+		} elseif ($constantReflection->isPrivate()) {
+			$errors[] = RuleErrorBuilder::message(sprintf(
+				'Private constant %s::%s overriding protected constant %s::%s should be protected or public.',
+				$constantReflection->getDeclaringClass()->getDisplayName(),
+				$constantReflection->getName(),
+				$prototype->getDeclaringClass()->getDisplayName(),
+				$prototype->getName()
+			))->nonIgnorable()->build();
+		}
+
 		if (!$this->checkPhpDocMethodSignatures) {
 			return $errors;
 		}

tests/PHPStan/Rules/Constants/OverridingConstantRuleTest.php

@@ -68,6 +68,27 @@ public function testFinal(): void
 			51,
 		];
 
+		$errors[] = [
+			'Private constant OverridingFinalConstant\PrivateDolor::PROTECTED_CONST overriding protected constant OverridingFinalConstant\Dolor::PROTECTED_CONST should be protected or public.',
+			69,
+		];
+		$errors[] = [
+			'Private constant OverridingFinalConstant\PrivateDolor::PUBLIC_CONST overriding public constant OverridingFinalConstant\Dolor::PUBLIC_CONST should also be public.',
+			70,
+		];
+		$errors[] = [
+			'Private constant OverridingFinalConstant\PrivateDolor::ANOTHER_PUBLIC_CONST overriding public constant OverridingFinalConstant\Dolor::ANOTHER_PUBLIC_CONST should also be public.',
+			71,
+		];
+		$errors[] = [
+			'Protected constant OverridingFinalConstant\ProtectedDolor::PUBLIC_CONST overriding public constant OverridingFinalConstant\Dolor::PUBLIC_CONST should also be public.',
+			80,
+		];
+		$errors[] = [
+			'Protected constant OverridingFinalConstant\ProtectedDolor::ANOTHER_PUBLIC_CONST overriding public constant OverridingFinalConstant\Dolor::ANOTHER_PUBLIC_CONST should also be public.',
+			81,
+		];
+
 		$this->analyse([__DIR__ . '/data/overriding-final-constant.php'], $errors);
 	}
 

tests/PHPStan/Rules/Constants/data/overriding-final-constant.php

@@ -51,3 +51,53 @@ class Lorem implements BarInterface
 	const FOO = 1;
 
 }
+
+class Dolor
+{
+
+	private const PRIVATE_CONST = 1;
+	protected const PROTECTED_CONST = 2;
+	public const PUBLIC_CONST = 3;
+	const ANOTHER_PUBLIC_CONST = 4;
+
+}
+
+class PrivateDolor extends Dolor
+{
+
+	private const PRIVATE_CONST = 1;
+	private const PROTECTED_CONST = 2; // error
+	private const PUBLIC_CONST = 3; // error
+	private const ANOTHER_PUBLIC_CONST = 4; // error
+
+}
+
+class ProtectedDolor extends Dolor
+{
+
+	protected const PRIVATE_CONST = 1;
+	protected const PROTECTED_CONST = 2;
+	protected const PUBLIC_CONST = 3; // error
+	protected const ANOTHER_PUBLIC_CONST = 4; // error
+
+}
+
+class PublicDolor extends Dolor
+{
+
+	public const PRIVATE_CONST = 1;
+	public const PROTECTED_CONST = 2;
+	public const PUBLIC_CONST = 3;
+	public const ANOTHER_PUBLIC_CONST = 4;
+
+}
+
+class Public2Dolor extends Dolor
+{
+
+	const PRIVATE_CONST = 1;
+	const PROTECTED_CONST = 2;
+	const PUBLIC_CONST = 3;
+	const ANOTHER_PUBLIC_CONST = 4;
+
+}