bug #24983 [Validator] enter the context in which to validate (xabbuh)

This PR was merged into the 3.4 branch.

Discussion
----------

[Validator] enter the context in which to validate

| Q             | A
| ------------- | ---
| Branch?       | 3.4
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #24246
| License       | MIT
| Doc PR        |

Commits
-------

7359cbe063 [Validator] enter the context in which to validate

src/Symfony/Component/Validator/Constraints/ValidValidator.php

@@ -26,12 +26,9 @@ class ValidValidator extends ConstraintValidator
             throw new UnexpectedTypeException($constraint, __NAMESPACE__.'\Valid');
         }
 
-        $violations = $this->context->getValidator()->validate($value, null, array($this->context->getGroup()));
-
-        foreach ($violations as $violation) {
-            $this->context->buildViolation($violation->getMessage(), $violation->getParameters())
-                ->atPath($violation->getPropertyPath())
-                ->addViolation();
-        }
+        $this->context
+            ->getValidator()
+            ->inContext($this->context)
+            ->validate($value, null, array($this->context->getGroup()));
     }
 }

src/Symfony/Component/Validator/Tests/Constraints/ValidValidatorTest.php

@@ -0,0 +1,61 @@
+<?php
+
+namespace Symfony\Component\Validator\Tests\Constraints;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Validator\Constraints as Assert;
+use Symfony\Component\Validator\Constraints\ValidValidator;
+use Symfony\Component\Validator\ValidatorBuilder;
+
+class ValidValidatorTest extends TestCase
+{
+    public function testPropertyPathsArePassedToNestedContexts()
+    {
+        $validatorBuilder = new ValidatorBuilder();
+        $validator = $validatorBuilder->enableAnnotationMapping()->getValidator();
+
+        $violations = $validator->validate(new Foo(), null, array('nested'));
+
+        $this->assertCount(1, $violations);
+        $this->assertSame('fooBar.fooBarBaz.foo', $violations->get(0)->getPropertyPath());
+    }
+
+    protected function createValidator()
+    {
+        return new ValidValidator();
+    }
+}
+
+class Foo
+{
+    /**
+     * @Assert\Valid(groups={"nested"})
+     */
+    public $fooBar;
+
+    public function __construct()
+    {
+        $this->fooBar = new FooBar();
+    }
+}
+
+class FooBar
+{
+    /**
+     * @Assert\Valid(groups={"nested"})
+     */
+    public $fooBarBaz;
+
+    public function __construct()
+    {
+        $this->fooBarBaz = new FooBarBaz();
+    }
+}
+
+class FooBarBaz
+{
+    /**
+     * @Assert\NotBlank(groups={"nested"})
+     */
+    public $foo;
+}