/**
* Returns an observable sequence that invokes the specified factory function whenever a new observer subscribes.
*
* @param callable $factory
* @return \Rx\Observable\AnonymousObservable
*/
public static function toObservable($factory)
{
if (!is_callable($factory)) {
throw new InvalidArgumentException('Factory should be a callable.');
}
$observableFactory = function () use($factory) {
return Promise::toObservable($factory());
};
return BaseObservable::defer($observableFactory);
}
/**
* Converts a Promise to an Observable sequence
*
* @param \React\Promise\PromiseInterface $promise
* @return \Rx\Observable\AnonymousObservable
*/
public static function toObservable(PromiseInterface $promise)
{
return BaseObservable::defer(function () use($promise) {
$subject = new AsyncSubject();
$promise->then(function ($value) use($subject) {
$subject->onNext($value);
$subject->onCompleted();
}, [$subject, "onError"]);
return $subject;
});
}
/**
* @test
*/
public function defer_throw()
{
$invoked = 0;
$results = $this->scheduler->startWithCreate(function () use(&$invoked) {
return BaseObservable::defer(function () use(&$invoked) {
$invoked++;
throw new \Exception('error');
});
});
$this->assertMessages([onError(200, new \Exception('error'))], $results->getMessages());
$this->assertEquals(1, $invoked);
}
<?php
require_once __DIR__ . '/../bootstrap.php';
$source = \Rx\Observable\BaseObservable::defer(function () {
return \Rx\Observable\BaseObservable::just(42);
});
$subscription = $source->subscribe($stdoutObserver);
//Next value: 42
//Complete!
