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<?php declare(strict_types = 1); namespace DASPRiD\EnumTest; use DASPRiD\Enum\Exception\CloneNotSupportedException; use DASPRiD\Enum\Exception\SerializeNotSupportedException; use DASPRiD\Enum\Exception\UnserializeNotSupportedException; use DASPRiD\Enum\NullValue; use PHPUnit\Framework\TestCase; final class NullValueTest extends TestCase { public function testExceptionOnCloneAttempt() : void { $this->expectException(CloneNotSupportedException::class); clone NullValue::instance(); } public function testExceptionOnSerializeAttempt() : void { $this->expectException(SerializeNotSupportedException::class); serialize(NullValue::instance()); } public function testExceptionOnUnserializeAttempt() : void { $this->expectException(UnserializeNotSupportedException::class); unserialize('O:22:"DASPRiD\\Enum\\NullValue":0:{}'); } }