public function testResponseToPropertiesTimestampValue()
{
$date = new \DateTimeImmutable();
$data = ['foo' => ['timestampValue' => $date->format(self::DATE_FORMAT)]];
$res = $this->mapper->responseToEntityProperties($data)['properties'];
$this->assertInstanceOf(\DateTimeImmutable::class, $res['foo']);
$this->assertEquals($date->format('c'), $res['foo']->format('c'));
}