Merge branch '5.3' into 5.4

* 5.3:
  Simplify some code with null coalesce operator
  Don't use deprecated TestLogger class

Author: derrabus

Constraints/File.php

@@ -163,10 +163,10 @@ private function normalizeBinaryFormat($maxSize)
         ];
         if (ctype_digit((string) $maxSize)) {
             $this->maxSize = (int) $maxSize;
-            $this->binaryFormat = null === $this->binaryFormat ? false : $this->binaryFormat;
+            $this->binaryFormat = $this->binaryFormat ?? false;
         } elseif (preg_match('/^(\d++)('.implode('|', array_keys($factors)).')$/i', $maxSize, $matches)) {
             $this->maxSize = $matches[1] * $factors[$unit = strtolower($matches[2])];
-            $this->binaryFormat = null === $this->binaryFormat ? 2 === \strlen($unit) : $this->binaryFormat;
+            $this->binaryFormat = $this->binaryFormat ?? (2 === \strlen($unit));
         } else {
             throw new ConstraintDefinitionException(sprintf('"%s" is not a valid maximum size.', $this->maxSize));
         }

Constraints/FileValidator.php

@@ -60,7 +60,7 @@ public function validate($value, Constraint $constraint)
                         $binaryFormat = $constraint->binaryFormat;
                     } else {
                         $limitInBytes = $iniLimitSize;
-                        $binaryFormat = null === $constraint->binaryFormat ? true : $constraint->binaryFormat;
+                        $binaryFormat = $constraint->binaryFormat ?? true;
                     }
 
                     [, $limitAsString, $suffix] = $this->factorizeSizes(0, $limitInBytes, $binaryFormat);

Mapping/ClassMetadata.php

@@ -384,11 +384,7 @@ public function hasPropertyMetadata(string $property)
      */
     public function getPropertyMetadata(string $property)
     {
-        if (!isset($this->members[$property])) {
-            return [];
-        }
-
-        return $this->members[$property];
+        return $this->members[$property] ?? [];
     }
 
     /**