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44 lines
951 B
44 lines
951 B
--TEST--
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Symfony Messenger style nullsafe chain with coalesce throw
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--FILE--
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<?php
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class MissingStampException extends Exception {}
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class TransportStamp
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{
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public function __construct(private string $id) {}
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public function getId(): string
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{
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return $this->id;
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}
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}
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class Envelope
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{
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public function __construct(private ?TransportStamp $stamp) {}
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public function last(string $class): ?object
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{
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return $this->stamp instanceof $class ? $this->stamp : null;
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}
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}
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function stampId(Envelope $envelope): string
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{
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return $envelope->last(TransportStamp::class)?->getId() ?? throw new MissingStampException('No stamp found.');
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}
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function main(): void
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{
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var_dump(stampId(new Envelope(new TransportStamp('abc'))));
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try {
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stampId(new Envelope(null));
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} catch (MissingStampException $e) {
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var_dump($e->getMessage());
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}
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}
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?>
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--EXPECT--
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string(3) "abc"
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string(15) "No stamp found."
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