[VarDumper] fixed DateCaster not displaying additional fields

src/Symfony/Component/VarDumper/Caster/DateCaster.php

@@ -31,7 +31,11 @@ class DateCaster
             .($location ? ($d->format('I') ? "\nDST On" : "\nDST Off") : '')
         ;
 
-        $a = [];
+        unset(
+            $a[Caster::PREFIX_DYNAMIC.'date'],
+            $a[Caster::PREFIX_DYNAMIC.'timezone'],
+            $a[Caster::PREFIX_DYNAMIC.'timezone_type']
+        );
         $a[$prefix.'date'] = new ConstStub(self::formatDateTime($d, $location ? ' e (P)' : ' P'), $title);
 
         $stub->class .= $d->format(' @U');

src/Symfony/Component/VarDumper/Tests/Caster/DateCasterTest.php

@@ -16,6 +16,7 @@ use Symfony\Component\VarDumper\Caster\Caster;
 use Symfony\Component\VarDumper\Caster\DateCaster;
 use Symfony\Component\VarDumper\Cloner\Stub;
 use Symfony\Component\VarDumper\Test\VarDumperTestTrait;
+use Symfony\Component\VarDumper\Tests\Fixtures\DateTimeChild;
 
 /**
  * @author Dany Maillard <danymaillard93b@gmail.com>
@@ -55,7 +56,7 @@ EODUMP;
 
         $stub = new Stub();
         $date = new \DateTime($time, new \DateTimeZone($timezone));
-        $cast = DateCaster::castDateTime($date, ['foo' => 'bar'], $stub, false, 0);
+        $cast = DateCaster::castDateTime($date, Caster::castObject($date, \DateTime::class), $stub, false, 0);
 
         $xDump = <<<EODUMP
 array:1 [
@@ -97,6 +98,40 @@ EODUMP;
         ];
     }
 
+    public function testCastDateTimeWithAdditionalChildProperty()
+    {
+        $stub = new Stub();
+        $date = new DateTimeChild('2020-02-13 00:00:00.123456', new \DateTimeZone('Europe/Paris'));
+        $objectCast = Caster::castObject($date, DateTimeChild::class);
+        $dateCast = DateCaster::castDateTime($date, $objectCast, $stub, false, 0);
+
+        $xDate = '2020-02-13 00:00:00.123456 Europe/Paris (+01:00)';
+        $xInfo = 'Thursday, February 13, 2020%Afrom now';
+        $xDump = <<<EODUMP
+array:2 [
+  "\\x00Symfony\Component\VarDumper\Tests\Fixtures\DateTimeChild\\x00addedProperty" => "foo"
+  "\\x00~\\x00date" => $xDate
+]
+EODUMP;
+
+        $this->assertDumpEquals($xDump, $dateCast);
+
+        $xDump = <<<EODUMP
+Symfony\Component\VarDumper\Caster\ConstStub {
+  +type: 1
+  +class: "$xDate"
+  +value: "%A$xInfo%A"
+  +cut: 0
+  +handle: 0
+  +refCount: 0
+  +position: 0
+  +attr: []
+}
+EODUMP;
+
+        $this->assertDumpMatchesFormat($xDump, $dateCast["\0~\0date"]);
+    }
+
     /**
      * @dataProvider provideIntervals
      */

src/Symfony/Component/VarDumper/Tests/Fixtures/DateTimeChild.php

@@ -0,0 +1,8 @@
+<?php
+
+namespace Symfony\Component\VarDumper\Tests\Fixtures;
+
+class DateTimeChild extends \DateTime
+{
+    private $addedProperty = 'foo';
+}