Merge branch '3.1' into 3.2

* 3.1:
  Fix getMock usage
  Remove dead code
  [Form] DateTimeToLocalizedStringTransformer does not use TZ when using only date
  [Validator] Fix caching of constraints derived from non-serializable parents
  [TwigBundle] Fix bug where namespaced paths don't take parent bundles in account
  [FrameworkBundle] Fix relative paths used as cache keys
  respect groups when merging constraints
  fix IPv6 address handling in server commands

Author: nicolas-grekas

Extension/Core/DataTransformer/DateTimeToLocalizedStringTransformer.php

@@ -129,11 +129,11 @@ public function reverseTransform($value)
         try {
             if ($dateOnly) {
                 // we only care about year-month-date, which has been delivered as a timestamp pointing to UTC midnight
-                return new \DateTime(gmdate('Y-m-d', $timestamp), new \DateTimeZone($this->inputTimezone));
+                $dateTime = new \DateTime(gmdate('Y-m-d', $timestamp), new \DateTimeZone($this->outputTimezone));
+            } else {
+                // read timestamp into DateTime object - the formatter delivers a timestamp
+                $dateTime = new \DateTime(sprintf('@%s', $timestamp));
             }
-
-            // read timestamp into DateTime object - the formatter delivers a timestamp
-            $dateTime = new \DateTime(sprintf('@%s', $timestamp));
             // set timezone separately, as it would be ignored if set via the constructor,
             // see http://php.net/manual/en/datetime.construct.php
             $dateTime->setTimezone(new \DateTimeZone($this->outputTimezone));

Tests/Extension/Core/DataTransformer/DateTimeToLocalizedStringTransformerTest.php

@@ -237,6 +237,15 @@ public function testReverseTransformWithDifferentTimezones()
         $this->assertDateTimeEquals($dateTime, $transformer->reverseTransform('03.02.2010, 04:05'));
     }
 
+    public function testReverseTransformOnlyDateWithDifferentTimezones()
+    {
+        $transformer = new DateTimeToLocalizedStringTransformer('Europe/Berlin', 'Pacific/Tahiti', \IntlDateFormatter::FULL, \IntlDateFormatter::FULL, \IntlDateFormatter::GREGORIAN, 'yyyy-MM-dd');
+
+        $dateTime = new \DateTime('2017-01-10 11:00', new \DateTimeZone('Europe/Berlin'));
+
+        $this->assertDateTimeEquals($dateTime, $transformer->reverseTransform('2017-01-10'));
+    }
+
     public function testReverseTransformWithDifferentPatterns()
     {
         $transformer = new DateTimeToLocalizedStringTransformer('UTC', 'UTC', \IntlDateFormatter::FULL, \IntlDateFormatter::FULL, \IntlDateFormatter::GREGORIAN, 'MM*yyyy*dd HH|mm|ss');