/** @test */
public function shouldSupportVeryDeepNestedPromises()
{
$deferreds = [];
// @TODO Increase count once global-queue is merged
for ($i = 0; $i < 10; $i++) {
$deferreds[] = $d = new Deferred();
$p = $d->promise();
$last = $p;
for ($j = 0; $j < 10; $j++) {
$last = $last->then(function ($result) {
return $result;
});
}
}
$p = null;
foreach ($deferreds as $d) {
if ($p) {
$d->resolve($p);
}
$p = $d->promise();
}
$deferreds[0]->resolve(true);
$mock = $this->createCallableMock();
$mock->expects($this->once())->method('__invoke')->with($this->identicalTo(true));
$deferreds[0]->promise()->then($mock);
}
/** @test */
public function shouldForwardValueWhenCallbackIsNull()
{
$mock = $this->createCallableMock();
$mock->expects($this->once())->method('__invoke')->with($this->identicalTo(1));
$d = new Deferred();
$d->then(null, $this->expectCallableNever())->then($mock, $this->expectCallableNever());
$d->resolve(1);
}
/** @test */
public function shouldPreserveTheOrderOfArrayWhenResolvingAsyncPromises()
{
$mock = $this->createCallableMock();
$mock->expects($this->once())->method('__invoke')->with($this->identicalTo([1, 2, 3]));
$deferred = new Deferred();
all([resolve(1), $deferred->promise(), resolve(3)])->then($mock);
$deferred->resolve(2);
}
/** @test */
public function shouldRejectARejectedPromise()
{
$expected = 123;
$d = new Deferred();
$d->reject($expected);
$mock = $this->createCallableMock();
$mock->expects($this->once())->method('__invoke')->with($this->identicalTo($expected));
When::reject($d->promise())->then($this->expectCallableNever(), $mock);
}
/** @test */
public function shouldNotRelyOnArryIndexesWhenUnwrappingToASingleResolutionValue()
{
$mock = $this->createCallableMock();
$mock->expects($this->once())->method('__invoke')->with($this->identicalTo(2));
$d1 = new Deferred();
$d2 = new Deferred();
When::any(array('abc' => $d1->promise(), 1 => $d2->promise()), $mock);
$d2->resolve(2);
$d1->resolve(1);
}
/** @test */
public function shouldNotCancelOtherPendingInputArrayPromisesIfOnePromiseRejects()
{
$mock = $this->createCallableMock();
$mock->expects($this->never())->method('__invoke');
$deferred = new Deferred($mock);
$deferred->reject();
$mock2 = $this->getMockBuilder('React\\Promise\\CancellablePromiseInterface')->getMock();
$mock2->expects($this->never())->method('cancel');
race([$deferred->promise(), $mock2])->cancel();
}
public function getPromiseTestAdapter()
{
$d = new Deferred();
$factory = function () use($d) {
return $d->promise();
};
return ['promise' => function () use($factory) {
return new LazyPromise($factory);
}, 'resolve' => [$d, 'resolve'], 'reject' => [$d, 'reject'], 'progress' => [$d, 'progress']];
}
/**
* @test
* @dataProvider invalidCallbackDataProvider
**/
public function shouldIgnoreNonFunctionsAndTriggerPhpNotice($var)
{
$errorCollector = new ErrorCollector();
$errorCollector->register();
$mock = $this->createCallableMock();
$mock->expects($this->once())->method('__invoke')->with($this->identicalTo(1));
$d = new Deferred();
$d->then(null, $var)->then($this->expectCallableNever(), $mock);
$d->reject(1);
$errorCollector->assertCollectedError('Invalid $errorHandler argument passed to then(), must be null or callable.', E_USER_NOTICE);
$errorCollector->unregister();
}
/** @test */
public function shouldRejectIfFirstSettledPromiseRejects()
{
$mock = $this->createCallableMock();
$mock->expects($this->once())->method('__invoke')->with($this->identicalTo(2));
$d1 = new Deferred();
$d2 = new Deferred();
$d3 = new Deferred();
race([$d1->promise(), $d2->promise(), $d3->promise()])->then($this->expectCallableNever(), $mock);
$d2->reject(2);
$d1->resolve(1);
$d3->resolve(3);
}
/**
* Create a new generator invoker
* @param Client $client
*/
function __construct(Client $client)
{
$this->client = $client;
parent::__construct(function ($resolve, $reject) {
return $this->cancel($resolve, $reject);
});
}
/** @test */
public function shouldSupportDeepNestingInPromiseChains()
{
$d = new Deferred();
$d->resolve(false);
$result = When::resolve(When::resolve($d->then(function ($val) {
$d = new Deferred();
$d->resolve($val);
$identity = function ($val) {
return $val;
};
return When::resolve($d->then($identity))->then(function ($val) {
return !$val;
});
})));
$mock = $this->createCallableMock();
$mock->expects($this->once())->method('__invoke')->with($this->identicalTo(true));
$result->then($mock);
}
/**
* Emits a value from the observable. The returned promise is resolved with the emitted value once all subscribers
* have been invoked.
*
* @param mixed $value
*
* @return \Interop\Async\Promise
*
* @throws \Error If the observable has resolved.
*/
private function emit($value) : Promise
{
if ($this->resolved) {
throw new \Error("The observable has been resolved; cannot emit more values");
}
if ($value instanceof Promise) {
$deferred = new Deferred();
$value->when(function ($e, $v) use($deferred) {
if ($this->resolved) {
$deferred->fail(new \Error("The observable was resolved before the promise result could be emitted"));
return;
}
if ($e) {
$this->fail($e);
$deferred->fail($e);
return;
}
$deferred->resolve($this->emit($v));
});
return $deferred->promise();
}
$promises = [];
foreach ($this->subscribers as $onNext) {
try {
$result = $onNext($value);
if ($result instanceof Promise) {
$promises[] = $result;
}
} catch (\Throwable $e) {
Loop::defer(static function () use($e) {
throw $e;
});
}
}
if (!$promises) {
return new Success($value);
}
$deferred = new Deferred();
$count = \count($promises);
$f = static function ($e) use($deferred, $value, &$count) {
if ($e) {
Loop::defer(static function () use($e) {
throw $e;
});
}
if (!--$count) {
$deferred->resolve($value);
}
};
foreach ($promises as $promise) {
$promise->when($f);
}
return $deferred->promise();
}
/**
* @param \Amp\Observable $observable
*/
public function __construct(Observable $observable)
{
$this->observable = $observable;
$deferred =& $this->deferred;
$values =& $this->values;
$deferreds =& $this->deferreds;
$resolved =& $this->resolved;
$this->observable->subscribe(static function ($value) use(&$deferred, &$values, &$deferreds, &$resolved) {
$values[] = $value;
$deferreds[] = $pressure = new Deferred();
if ($deferred !== null) {
$temp = $deferred;
$deferred = null;
$temp->resolve(true);
}
if ($resolved) {
return null;
}
return $pressure->promise();
});
$result =& $this->result;
$error =& $this->exception;
$this->observable->when(static function ($exception, $value) use(&$deferred, &$result, &$error, &$resolved) {
$resolved = true;
if ($exception) {
$result = null;
$error = $exception;
if ($deferred !== null) {
$deferred->fail($exception);
}
return;
}
$result = $value;
if ($deferred !== null) {
$deferred->resolve(false);
}
});
}
private function onParsedEntityHeaders(Client $client, array $parseResult)
{
$ireq = $this->initializeRequest($client, $parseResult);
$id = $parseResult["id"];
$client->bodyPromisors[$id] = $bodyPromisor = new Deferred();
$ireq->body = new Body($bodyPromisor->promise());
$this->clearKeepAliveTimeout($client);
$this->respond($ireq);
}
/**
* Get the message content as it becomes available.
*
* @see IncomingMessage::content() to get the content as a string.
*
* @see IncomingMessage::contentStream() to read the content from a stream.
*
* The returned promise is notified when content arrives.
* @see https://github.com/reactphp/promise#extendedpromiseinterfaceprogress
*
* Cancelling the returned promise discards any remaining content.
*
* @return null [via promise] All content has been received.
* @throws LogicException [via promise] The message content has already been consumed or discarded.
*/
public function contentUnbuffered()
{
if ($this->contentHandled) {
return reject(new LogicException('The message content has already been consumed or discarded.'));
}
$this->contentHandled = true;
if (0 === $this->headerFrame->contentLength) {
return resolve();
}
$deferred = new Deferred($this->cancelContentListener);
$this->onBodyFrame = function ($exception, $frame, $final) use($deferred) {
if ($exception) {
$deferred->reject($exception);
} else {
$deferred->notify($frame->content);
if ($final) {
$deferred->resolve();
}
}
};
return $deferred->promise();
}
/** @test */
public function shouldAllowRejectAfterProgress()
{
$d = new Deferred();
$mock = $this->createCallableMock();
$mock->expects($this->at(0))->method('__invoke')->with($this->identicalTo(1));
$mock->expects($this->at(1))->method('__invoke')->with($this->identicalTo(2));
$d->promise()->then($this->expectCallableNever(), $mock, $mock);
$d->resolver()->progress(1);
$d->resolver()->reject(2);
}
/**
* Returns a promise that succeeds or fails when the first promise succeeds or fails.
*
* @param Promise[] $promises
*
* @return \Interop\Async\Promise
*
* @throws \Error If the array is empty or a non-Promise is in the array.
*/
function choose(array $promises) : Promise
{
if (empty($promises)) {
throw new \Error("No promises provided");
}
$deferred = new Deferred();
$resolved = false;
foreach ($promises as $promise) {
if (!$promise instanceof Promise) {
throw new \Error("Non-promise provided");
}
$promise->when(function ($exception, $value) use(&$resolved, $deferred) {
if ($resolved) {
return;
}
$resolved = true;
if ($exception) {
$deferred->fail($exception);
return;
}
$deferred->resolve($value);
});
}
return $deferred->promise();
}
/**
* Declare this exchange.
*
* @recoil-coroutine
*
* @param boolean $passive True to use a "passive" declare mode.
* @param Channel|null $channel The application-managed channel to use (null = auto-managed).
*
* @throws ResourceNotFoundException The exchange does not exist.
* @throws DeclareException The exchange already exists with different a type or options.
* @throws DeclareException A reserved exchange name was used.
* @throws ConnectionException The connection is closed.
* @throws ChannelException The channel is closed.
*/
private function declareExchange($passive, Channel $channel = null) : Generator
{
if ('amq.' === substr($this->name, 0, 4)) {
return reject(DeclareException::exchangeNameIsReserved($this->name));
}
$deferred = new Deferred();
$this->broker->acquireChannel(function ($exception, $brokerChannel) use($channel, $passive, $deferred) {
if ($exception) {
$deferred->reject($exception);
} else {
$brokerChannel->call(ExchangeDeclareFrame::create($this->name, $this->type->value(), $passive, $this->options->durable, $this->options->autoDelete, $this->options->internal, false, $this->arguments), ExchangeDeclareOkFrame::METHOD_ID, function ($exception, $frame) use($brokerChannel, $channel, $deferred) {
if (!$channel) {
$this->broker->releaseChannel($brokerChannel);
}
if ($exception) {
if ($exception instanceof AmqpException) {
if ($exception->getCode() === Constants::PRECONDITION_FAILED) {
$exception = DeclareException::exchangeTypeOrOptionMismatch($this->name, $this->type, $this->options, $exception);
} elseif ($exception->getCode() === Constants::NOT_FOUND) {
$exception = ResourceNotFoundException::exchangeNotFound($this->name, $exception);
}
}
$deferred->reject($exception);
} else {
$deferred->resolve($this);
}
});
}
}, $channel);
return $deferred->promise();
}
public static function map($promisesOrValues, $mapFunc)
{
return When::resolve($promisesOrValues)->then(function ($array) use($mapFunc) {
if (!is_array($array)) {
$array = array();
}
$toResolve = count($array);
$results = array();
$deferred = new Deferred();
if (!$toResolve) {
$deferred->resolve($results);
} else {
$resolve = function ($item, $i) use($mapFunc, &$results, &$toResolve, $deferred) {
When::resolve($item)->then($mapFunc)->then(function ($mapped) use(&$results, $i, &$toResolve, $deferred) {
$results[$i] = $mapped;
if (0 === --$toResolve) {
$deferred->resolve($results);
}
}, array($deferred, 'reject'));
};
foreach ($array as $i => $item) {
$resolve($item, $i);
}
}
return $deferred->promise();
});
}
/**
* Create an artificial timeout for any Promise instance
*
* If the timeout expires prior to promise resolution the returned
* promise is failed.
*
* @param \Amp\Promise $promise The promise to which the timeout applies
* @param int $msTimeout The timeout in milliseconds
* @return \Amp\Promise
*/
function timeout(Promise $promise, $msTimeout)
{
$resolved = false;
$promisor = new Deferred();
$watcherId = once(function () use($promisor, &$resolved) {
$resolved = true;
$promisor->fail(new TimeoutException("Promise resolution timed out"));
}, $msTimeout);
$promise->when(function ($error = null, $result = null) use($promisor, $watcherId, &$resolved) {
if ($resolved) {
return;
}
$resolved = true;
cancel($watcherId);
if ($error) {
$promisor->fail($error);
} else {
$promisor->succeed($result);
}
});
return $promisor->promise();
}
/** @test */
public function shouldCancelOtherPendingInputArrayPromisesIfOnePromiseFulfills()
{
$mock = $this->createCallableMock();
$mock->expects($this->never())->method('__invoke');
$deferred = new Deferred($mock);
$deferred->resolve();
$mock2 = $this->getMock('React\\Promise\\CancellablePromiseInterface');
$mock2->expects($this->once())->method('cancel');
some([$deferred->promise(), $mock2], 1)->cancel();
}
/** @test */
public function shouldProvideCorrectBasisValue()
{
$insertIntoArray = function ($arr, $val, $i) {
$arr[$i] = $val;
return $arr;
};
$d1 = new Deferred();
$d2 = new Deferred();
$d3 = new Deferred();
$mock = $this->createCallableMock();
$mock->expects($this->once())->method('__invoke')->with($this->identicalTo([1, 2, 3]));
reduce([$d1->promise(), $d2->promise(), $d3->promise()], $insertIntoArray, [])->then($mock);
$d3->resolve(3);
$d1->resolve(1);
$d2->resolve(2);
}
/** @test */
public function shouldReturnSilentlyOnProgressWhenAlreadyRejected()
{
$d = new Deferred();
$d->reject(1);
$this->assertNull($d->progress());
}