feature symfony#57793 [Serializer] Support subclasses of DateTime and DateTimeImmutable (amcsi)

This PR was squashed before being merged into the 7.2 branch.

Discussion
----------

[Serializer] Support subclasses of `DateTime` and `DateTimeImmutable`

| Q             | A
| ------------- | ---
| Branch?       | 7.2
| Bug fix?      | no
| New feature?  | yes
| Deprecations? | no
| Issues        | symfony#57482
| License       | MIT

Commits
-------

1225eb7 [Serializer] Support subclasses of `DateTime` and `DateTimeImmutable`

Author: nicolas-grekas

src/Symfony/Component/Serializer/CHANGELOG.md

@@ -18,6 +18,7 @@ CHANGELOG
  * Add `CamelCaseToSnakeCaseNameConverter::REQUIRE_SNAKE_CASE_PROPERTIES` context option
  * Deprecate `AbstractNormalizerContextBuilder::withDefaultContructorArguments(?array $defaultContructorArguments)`, use `withDefaultConstructorArguments(?array $defaultConstructorArguments)` instead (note the missing `s` character in Contructor word in deprecated method)
  * Add `XmlEncoder::CDATA_WRAPPING_PATTERN` context option
+ * Support subclasses of `\DateTime` and `\DateTimeImmutable` for denormalization
 
 7.0
 ---

src/Symfony/Component/Serializer/Normalizer/DateTimeNormalizer.php

@@ -138,7 +138,7 @@ public function denormalize(mixed $data, string $type, ?string $format = null, a
 
     public function supportsDenormalization(mixed $data, string $type, ?string $format = null, array $context = []): bool
     {
-        return isset(self::SUPPORTED_TYPES[$type]);
+        return is_a($type, \DateTimeInterface::class, true);
     }
 
     /**

src/Symfony/Component/Serializer/Tests/Normalizer/DateTimeNormalizerTest.php

@@ -232,6 +232,8 @@ public function testSupportsDenormalization()
         $this->assertTrue($this->normalizer->supportsDenormalization('2016-01-01T00:00:00+00:00', \DateTimeInterface::class));
         $this->assertTrue($this->normalizer->supportsDenormalization('2016-01-01T00:00:00+00:00', \DateTime::class));
         $this->assertTrue($this->normalizer->supportsDenormalization('2016-01-01T00:00:00+00:00', \DateTimeImmutable::class));
+        $this->assertTrue($this->normalizer->supportsDenormalization('2016-01-01T00:00:00+00:00', DateTimeImmutableChild::class));
+        $this->assertTrue($this->normalizer->supportsDenormalization('2016-01-01T00:00:00+00:00', DateTimeChild::class));
         $this->assertFalse($this->normalizer->supportsDenormalization('foo', 'Bar'));
     }
 
@@ -241,6 +243,10 @@ public function testDenormalize()
         $this->assertEquals(new \DateTimeImmutable('2016/01/01', new \DateTimeZone('UTC')), $this->normalizer->denormalize('2016-01-01T00:00:00+00:00', \DateTimeImmutable::class));
         $this->assertEquals(new \DateTime('2016/01/01', new \DateTimeZone('UTC')), $this->normalizer->denormalize('2016-01-01T00:00:00+00:00', \DateTime::class));
         $this->assertEquals(new \DateTime('2016/01/01', new \DateTimeZone('UTC')), $this->normalizer->denormalize('  2016-01-01T00:00:00+00:00  ', \DateTime::class));
+        $this->assertEquals(new DateTimeImmutableChild('2016/01/01', new \DateTimeZone('UTC')), $this->normalizer->denormalize('2016-01-01T00:00:00+00:00', DateTimeImmutableChild::class));
+        $this->assertEquals(new DateTimeImmutableChild('2016/01/01', new \DateTimeZone('UTC')), $this->normalizer->denormalize('2016-01-01T00:00:00+00:00', DateTimeImmutableChild::class));
+        $this->assertEquals(new DateTimeChild('2016/01/01', new \DateTimeZone('UTC')), $this->normalizer->denormalize('2016-01-01T00:00:00+00:00', DateTimeChild::class));
+        $this->assertEquals(new DateTimeChild('2016/01/01', new \DateTimeZone('UTC')), $this->normalizer->denormalize('  2016-01-01T00:00:00+00:00  ', DateTimeChild::class));
         $this->assertEquals(new \DateTimeImmutable('2023-05-06T17:35:34.000000+0000', new \DateTimeZone('UTC')), $this->normalizer->denormalize(1683394534, \DateTimeImmutable::class, null, [DateTimeNormalizer::FORMAT_KEY => 'U']));
         $this->assertEquals(new \DateTimeImmutable('2023-05-06T17:35:34.123400+0000', new \DateTimeZone('UTC')), $this->normalizer->denormalize(1683394534.1234, \DateTimeImmutable::class, null, [DateTimeNormalizer::FORMAT_KEY => 'U.u']));
     }
@@ -387,3 +393,10 @@ public function testDenormalizeFormatMismatchThrowsException()
         $this->normalizer->denormalize('2016-01-01T00:00:00+00:00', \DateTimeInterface::class, null, [DateTimeNormalizer::FORMAT_KEY => 'Y-m-d|']);
     }
 }
+
+class DateTimeChild extends \DateTime
+{
+}
+class DateTimeImmutableChild extends \DateTimeImmutable
+{
+}