[Php80] Handle union collection of FullyQualifieds on ClassPropertyAssignToConstructorPromotionRector (#722)

Co-authored-by: Jáchym Toušek <enumag@gmail.com>

rules-tests/Php80/Rector/Class_/ClassPropertyAssignToConstructorPromotionRector/Fixture/multi_unrelated_fully_qualified.php.inc

@@ -0,0 +1,32 @@
+<?php
+
+namespace Rector\Tests\Php80\Rector\Class_\ClassPropertyAssignToConstructorPromotionRector\Fixture;
+
+class MultiUnrelatedFullyQualified
+{
+    public \DateTime $x;
+    public \stdClass $y;
+
+    public function __construct(
+        \DateTime $x,
+        \stdClass $y
+    ) {
+        $this->x = $x;
+        $this->y = $y;
+    }
+}
+
+?>
+-----
+<?php
+
+namespace Rector\Tests\Php80\Rector\Class_\ClassPropertyAssignToConstructorPromotionRector\Fixture;
+
+class MultiUnrelatedFullyQualified
+{
+    public function __construct(public \DateTime $x, public \stdClass $y)
+    {
+    }
+}
+
+?>

rules-tests/Php80/Rector/Class_/ClassPropertyAssignToConstructorPromotionRector/Fixture/union_fully_qualified.php.inc

@@ -0,0 +1,51 @@
+<?php
+
+namespace Rector\Tests\Php80\Rector\Class_\ClassPropertyAssignToConstructorPromotionRector\Fixture;
+
+interface X {}
+
+class Y implements X {}
+
+class Z {}
+
+final class UnionFullyQualified
+{
+	public Y $y;
+
+	public Z $z;
+
+	public function __construct(Y $y, Z $z)
+	{
+		$this->y = $y;
+		$this->z = $z;
+	}
+
+	public function getX(): X
+	{
+		return $this->y;
+	}
+}
+?>
+-----
+<?php
+
+namespace Rector\Tests\Php80\Rector\Class_\ClassPropertyAssignToConstructorPromotionRector\Fixture;
+
+interface X {}
+
+class Y implements X {}
+
+class Z {}
+
+final class UnionFullyQualified
+{
+	public function __construct(public Y $y, public Z $z)
+	{
+	}
+
+	public function getX(): X
+	{
+		return $this->y;
+	}
+}
+?>

rules/Php80/NodeAnalyzer/PromotedPropertyCandidateResolver.php

@@ -13,6 +13,7 @@ use PhpParser\Node\Stmt\ClassMethod;
 use PhpParser\Node\Stmt\Expression;
 use PhpParser\Node\Stmt\Property;
 use PHPStan\Type\Type;
+use PHPStan\Type\UnionType;
 use Rector\Core\PhpParser\Comparing\NodeComparator;
 use Rector\Core\PhpParser\Node\BetterNodeFinder;
 use Rector\Core\ValueObject\MethodName;
@@ -21,6 +22,7 @@ use Rector\NodeTypeResolver\NodeTypeResolver;
 use Rector\NodeTypeResolver\PHPStan\Type\TypeFactory;
 use Rector\NodeTypeResolver\TypeComparator\TypeComparator;
 use Rector\Php80\ValueObject\PropertyPromotionCandidate;
+use Rector\StaticTypeMapper\ValueObject\Type\FullyQualifiedObjectType;
 use Rector\TypeDeclaration\TypeInferer\PropertyTypeInferer;
 
 final class PromotedPropertyCandidateResolver
@@ -182,8 +184,18 @@ final class PromotedPropertyCandidateResolver
             );
         }
 
+        $isAllFullyQualifiedObjectType = true;
+        if ($propertyType instanceof UnionType) {
+            foreach ($propertyType->getTypes() as $type) {
+                if (! $type instanceof FullyQualifiedObjectType) {
+                    $isAllFullyQualifiedObjectType = false;
+                    break;
+                }
+            }
+        }
+
         // different types, not a good to fit
-        return ! $this->typeComparator->areTypesEqual($propertyType, $matchedParamType);
+        return ! $isAllFullyQualifiedObjectType && ! $this->typeComparator->areTypesEqual($propertyType, $matchedParamType);
     }
 
     /**