fix: adding optional parameters to contructor

src/DetectChanges/BCBreak/MethodBased/MethodParameterAdded.php

@@ -11,6 +11,7 @@
 use Roave\BetterReflection\Reflection\ReflectionParameter;
 
 use function array_diff;
+use function array_filter;
 use function array_map;
 
 /**
@@ -25,8 +26,15 @@ public function __invoke(ReflectionMethod $fromMethod, ReflectionMethod $toMetho
             return Changes::empty();
         }
 
+        $toParameters = $toMethod->getParameters();
+        if ($fromMethod->isConstructor()) {
+            // new optional parameters of constructors are not BC breaks,
+            // as the method signature of child classes does not need to match the parent
+            $toParameters = array_filter($toParameters, static fn (ReflectionParameter $param) => ! $param->isOptional());
+        }
+
         $added = array_diff(
-            array_map(static fn (ReflectionParameter $param) => $param->getName(), $toMethod->getParameters()),
+            array_map(static fn (ReflectionParameter $param) => $param->getName(), $toParameters),
             array_map(static fn (ReflectionParameter $param) => $param->getName(), $fromMethod->getParameters()),
         );
 

test/unit/DetectChanges/BCBreak/MethodBased/MethodParameterAddedTest.php

@@ -109,6 +109,7 @@ public function noParameters() {}
     public function twoParams(int $one, int $two) {}
     private function privateMethod() {}
     public function removedParameter(int $one, array $options = []) {}
+    public function __construct(int $one) {}
 }
 PHP
             ,
@@ -127,6 +128,7 @@ public function noParameters() {}
     public function twoParams(int $one, int $two) {}
     private function privateMethod(array $options = []) {}
     public function removedParameter(int $one) {}
+    public function __construct(int $one, int $two, array $options = []) {}
 }
 PHP
             ,
@@ -149,6 +151,7 @@ public function removedParameter(int $one) {}
             'privateMethod' => [],
             'removedParameter' => [],
             'twoParams' => [],
+            '__construct' => ['[BC] ADDED: Parameter two was added to Method __construct() of class TheClass'],
         ];
 
         return array_combine(