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<?php |
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namespace Butler\Graphql\Concerns; |
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use Closure; |
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use Exception; |
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use React\EventLoop\Factory as LoopFactory; |
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use React\EventLoop\LoopInterface; |
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use React\Promise\PromiseInterface; |
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use function React\Promise\all; |
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trait AssertsPromises |
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{ |
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private $loop; |
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/** |
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* @param \React\Promise\PromiseInterface|array $promise |
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* @param mixed|Closure $expectedValue |
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*/ |
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public function assertPromiseFulfills($promise, $expectedValue = null): void |
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{ |
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$this->addToAssertionCount(1); |
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if (! $promise instanceof PromiseInterface) { |
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$promise = all($promise); |
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} |
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try { |
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$result = $this->waitForPromise($promise); |
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} catch (Exception $_) { |
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$this->fail('Failed asserting that promise fulfills. Promise was rejected.'); |
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} |
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if ($expectedValue instanceof Closure) { |
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$this->assertTrue($expectedValue($result)); |
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return; |
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} |
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if (! is_null($expectedValue)) { |
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$this->assertEquals( |
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$expectedValue, |
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$result, |
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'Failed asserting that promise fulfills with a specified value.' |
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); |
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} |
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} |
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protected function getLoop(): LoopInterface |
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{ |
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if (! $this->loop) { |
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$this->loop = LoopFactory::create(); |
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} |
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return $this->loop; |
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} |
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private function waitForPromise(PromiseInterface $promise) |
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{ |
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$wait = true; |
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$resolved = null; |
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$exception = null; |
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$rejected = false; |
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$promise->then( |
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function ($c) use (&$resolved, &$wait) { |
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$resolved = $c; |
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$wait = false; |
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$this->getLoop()->stop(); |
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}, |
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function ($error) use (&$exception, &$rejected, &$wait) { |
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$exception = $error; |
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$rejected = true; |
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$wait = false; |
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$this->getLoop()->stop(); |
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} |
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); |
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// Explicitly overwrite argument with null value. This ensure that this |
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// argument does not show up in the stack trace in PHP 7+ only. |
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$promise = null; |
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while ($wait) { |
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$this->getLoop()->run(); |
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} |
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4 |
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if ($rejected) { |
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if (! $exception instanceof Exception) { |
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$type = is_object($exception) ? get_class($exception) : gettype($exception); |
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$exception = new \UnexpectedValueException( |
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'Promise rejected with unexpected value of type ' . $type, |
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0, |
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$exception instanceof \Throwable ? $exception : null |
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); |
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} |
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throw $exception; |
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} |
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return $resolved; |
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} |
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} |
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glesys /
butler-graphql
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