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<?php
namespace GuzzleHttp\Promise\Tests;
use GuzzleHttp\Promise as P;
use GuzzleHttp\Promise\FulfilledPromise;
use GuzzleHttp\Promise\Promise;
use GuzzleHttp\Promise\RejectedPromise;
class FunctionsTest extends \PHPUnit_Framework_TestCase
{
public function testCreatesPromiseForValue()
{
$p = \GuzzleHttp\Promise\promise_for('foo');
$this->assertInstanceOf('GuzzleHttp\Promise\FulfilledPromise', $p);
}
public function testReturnsPromiseForPromise()
{
$p = new Promise();
$this->assertSame($p, \GuzzleHttp\Promise\promise_for($p));
}
public function testReturnsPromiseForThennable()
{
$p = new Thennable();
$wrapped = \GuzzleHttp\Promise\promise_for($p);
$this->assertNotSame($p, $wrapped);
$this->assertInstanceOf('GuzzleHttp\Promise\PromiseInterface', $wrapped);
$p->resolve('foo');
P\queue()->run();
$this->assertEquals('foo', $wrapped->wait());
}
public function testReturnsRejection()
{
$p = \GuzzleHttp\Promise\rejection_for('fail');
$this->assertInstanceOf('GuzzleHttp\Promise\RejectedPromise', $p);
$this->assertEquals('fail', $this->readAttribute($p, 'reason'));
}
public function testReturnsPromisesAsIsInRejectionFor()
{
$a = new Promise();
$b = \GuzzleHttp\Promise\rejection_for($a);
$this->assertSame($a, $b);
}
public function testWaitsOnAllPromisesIntoArray()
{
$e = new \Exception();
$a = new Promise(function () use (&$a) { $a->resolve('a'); });
$b = new Promise(function () use (&$b) { $b->reject('b'); });
$c = new Promise(function () use (&$c, $e) { $c->reject($e); });
$results = \GuzzleHttp\Promise\inspect_all([$a, $b, $c]);
$this->assertEquals([
['state' => 'fulfilled', 'value' => 'a'],
['state' => 'rejected', 'reason' => 'b'],
['state' => 'rejected', 'reason' => $e]
], $results);
}
public function testUnwrapsPromisesWithNoDefaultAndFailure()
{
$promises = [new FulfilledPromise('a'), new Promise()];
\GuzzleHttp\Promise\unwrap($promises);
}
public function testUnwrapsPromisesWithNoDefault()
{
$promises = [new FulfilledPromise('a')];
$this->assertEquals(['a'], \GuzzleHttp\Promise\unwrap($promises));
}
public function testUnwrapsPromisesWithKeys()
{
$promises = [
'foo' => new FulfilledPromise('a'),
'bar' => new FulfilledPromise('b'),
];
$this->assertEquals([
'foo' => 'a',
'bar' => 'b'
], \GuzzleHttp\Promise\unwrap($promises));
}
public function testAllAggregatesSortedArray()
{
$a = new Promise();
$b = new Promise();
$c = new Promise();
$d = \GuzzleHttp\Promise\all([$a, $b, $c]);
$b->resolve('b');
$a->resolve('a');
$c->resolve('c');
$d->then(
function ($value) use (&$result) { $result = $value; },
function ($reason) use (&$result) { $result = $reason; }
);
P\queue()->run();
$this->assertEquals(['a', 'b', 'c'], $result);
}
public function testAllThrowsWhenAnyRejected()
{
$a = new Promise();
$b = new Promise();
$c = new Promise();
$d = \GuzzleHttp\Promise\all([$a, $b, $c]);
$b->resolve('b');
$a->reject('fail');
$c->resolve('c');
$d->then(
function ($value) use (&$result) { $result = $value; },
function ($reason) use (&$result) { $result = $reason; }
);
P\queue()->run();
$this->assertEquals('fail', $result);
}
public function testSomeAggregatesSortedArrayWithMax()
{
$a = new Promise();
$b = new Promise();
$c = new Promise();
$d = \GuzzleHttp\Promise\some(2, [$a, $b, $c]);
$b->resolve('b');
$c->resolve('c');
$a->resolve('a');
$d->then(function ($value) use (&$result) { $result = $value; });
P\queue()->run();
$this->assertEquals(['b', 'c'], $result);
}
public function testSomeRejectsWhenTooManyRejections()
{
$a = new Promise();
$b = new Promise();
$d = \GuzzleHttp\Promise\some(2, [$a, $b]);
$a->reject('bad');
$b->resolve('good');
P\queue()->run();
$this->assertEquals($a::REJECTED, $d->getState());
$d->then(null, function ($reason) use (&$called) {
$called = $reason;
});
P\queue()->run();
$this->assertInstanceOf('GuzzleHttp\Promise\AggregateException', $called);
$this->assertContains('bad', $called->getReason());
}
public function testCanWaitUntilSomeCountIsSatisfied()
{
$a = new Promise(function () use (&$a) { $a->resolve('a'); });
$b = new Promise(function () use (&$b) { $b->resolve('b'); });
$c = new Promise(function () use (&$c) { $c->resolve('c'); });
$d = \GuzzleHttp\Promise\some(2, [$a, $b, $c]);
$this->assertEquals(['a', 'b'], $d->wait());
}
public function testThrowsIfImpossibleToWaitForSomeCount()
{
$a = new Promise(function () use (&$a) { $a->resolve('a'); });
$d = \GuzzleHttp\Promise\some(2, [$a]);
$d->wait();
}
public function testThrowsIfResolvedWithoutCountTotalResults()
{
$a = new Promise();
$b = new Promise();
$d = \GuzzleHttp\Promise\some(3, [$a, $b]);
$a->resolve('a');
$b->resolve('b');
$d->wait();
}
public function testAnyReturnsFirstMatch()
{
$a = new Promise();
$b = new Promise();
$c = \GuzzleHttp\Promise\any([$a, $b]);
$b->resolve('b');
$a->resolve('a');
$c->then(function ($value) use (&$result) { $result = $value; });
P\queue()->run();
$this->assertEquals('b', $result);
}
public function testSettleFulfillsWithFulfilledAndRejected()
{
$a = new Promise();
$b = new Promise();
$c = new Promise();
$d = \GuzzleHttp\Promise\settle([$a, $b, $c]);
$b->resolve('b');
$c->resolve('c');
$a->reject('a');
P\queue()->run();
$this->assertEquals('fulfilled', $d->getState());
$d->then(function ($value) use (&$result) { $result = $value; });
P\queue()->run();
$this->assertEquals([
['state' => 'rejected', 'reason' => 'a'],
['state' => 'fulfilled', 'value' => 'b'],
['state' => 'fulfilled', 'value' => 'c']
], $result);
}
public function testCanInspectFulfilledPromise()
{
$p = new FulfilledPromise('foo');
$this->assertEquals([
'state' => 'fulfilled',
'value' => 'foo'
], \GuzzleHttp\Promise\inspect($p));
}
public function testCanInspectRejectedPromise()
{
$p = new RejectedPromise('foo');
$this->assertEquals([
'state' => 'rejected',
'reason' => 'foo'
], \GuzzleHttp\Promise\inspect($p));
}
public function testCanInspectRejectedPromiseWithNormalException()
{
$e = new \Exception('foo');
$p = new RejectedPromise($e);
$this->assertEquals([
'state' => 'rejected',
'reason' => $e
], \GuzzleHttp\Promise\inspect($p));
}
public function testCallsEachLimit()
{
$p = new Promise();
$aggregate = \GuzzleHttp\Promise\each_limit($p, 2);
$p->resolve('a');
P\queue()->run();
$this->assertEquals($p::FULFILLED, $aggregate->getState());
}
public function testEachLimitAllRejectsOnFailure()
{
$p = [new FulfilledPromise('a'), new RejectedPromise('b')];
$aggregate = \GuzzleHttp\Promise\each_limit_all($p, 2);
P\queue()->run();
$this->assertEquals(P\PromiseInterface::REJECTED, $aggregate->getState());
$result = \GuzzleHttp\Promise\inspect($aggregate);
$this->assertEquals('b', $result['reason']);
}
public function testIterForReturnsIterator()
{
$iter = new \ArrayIterator();
$this->assertSame($iter, \GuzzleHttp\Promise\iter_for($iter));
}
public function testKnowsIfFulfilled()
{
$p = new FulfilledPromise(null);
$this->assertTrue(P\is_fulfilled($p));
$this->assertFalse(P\is_rejected($p));
}
public function testKnowsIfRejected()
{
$p = new RejectedPromise(null);
$this->assertTrue(P\is_rejected($p));
$this->assertFalse(P\is_fulfilled($p));
}
public function testKnowsIfSettled()
{
$p = new RejectedPromise(null);
$this->assertTrue(P\is_settled($p));
$p = new Promise();
$this->assertFalse(P\is_settled($p));
}
public function testReturnsTrampoline()
{
$this->assertInstanceOf('GuzzleHttp\Promise\TaskQueue', P\queue());
$this->assertSame(P\queue(), P\queue());
}
public function testCanScheduleThunk()
{
$tramp = P\queue();
$promise = P\task(function () { return 'Hi!'; });
$c = null;
$promise->then(function ($v) use (&$c) { $c = $v; });
$this->assertNull($c);
$tramp->run();
$this->assertEquals('Hi!', $c);
}
public function testCanScheduleThunkWithRejection()
{
$tramp = P\queue();
$promise = P\task(function () { throw new \Exception('Hi!'); });
$c = null;
$promise->otherwise(function ($v) use (&$c) { $c = $v; });
$this->assertNull($c);
$tramp->run();
$this->assertEquals('Hi!', $c->getMessage());
}
public function testCanScheduleThunkWithWait()
{
$tramp = P\queue();
$promise = P\task(function () { return 'a'; });
$this->assertEquals('a', $promise->wait());
$tramp->run();
}
public function testYieldsFromCoroutine()
{
$promise = P\coroutine(function () {
$value = (yield new P\FulfilledPromise('a'));
yield $value . 'b';
});
$promise->then(function ($value) use (&$result) { $result = $value; });
P\queue()->run();
$this->assertEquals('ab', $result);
}
public function testCanCatchExceptionsInCoroutine()
{
$promise = P\coroutine(function () {
try {
yield new P\RejectedPromise('a');
$this->fail('Should have thrown into the coroutine!');
} catch (P\RejectionException $e) {
$value = (yield new P\FulfilledPromise($e->getReason()));
yield $value . 'b';
}
});
$promise->then(function ($value) use (&$result) { $result = $value; });
P\queue()->run();
$this->assertEquals(P\PromiseInterface::FULFILLED, $promise->getState());
$this->assertEquals('ab', $result);
}
public function testRejectsParentExceptionWhenException()
{
$promise = P\coroutine(function () {
yield new P\FulfilledPromise(0);
throw new \Exception('a');
});
$promise->then(
function () { $this->fail(); },
function ($reason) use (&$result) { $result = $reason; }
);
P\queue()->run();
$this->assertInstanceOf('Exception', $result);
$this->assertEquals('a', $result->getMessage());
}
public function testCanRejectFromRejectionCallback()
{
$promise = P\coroutine(function () {
yield new P\FulfilledPromise(0);
yield new P\RejectedPromise('no!');
});
$promise->then(
function () { $this->fail(); },
function ($reason) use (&$result) { $result = $reason; }
);
P\queue()->run();
$this->assertInstanceOf('GuzzleHttp\Promise\RejectionException', $result);
$this->assertEquals('no!', $result->getReason());
}
public function testCanAsyncReject()
{
$rej = new P\Promise();
$promise = P\coroutine(function () use ($rej) {
yield new P\FulfilledPromise(0);
yield $rej;
});
$promise->then(
function () { $this->fail(); },
function ($reason) use (&$result) { $result = $reason; }
);
$rej->reject('no!');
P\queue()->run();
$this->assertInstanceOf('GuzzleHttp\Promise\RejectionException', $result);
$this->assertEquals('no!', $result->getReason());
}
public function testCanCatchAndThrowOtherException()
{
$promise = P\coroutine(function () {
try {
yield new P\RejectedPromise('a');
$this->fail('Should have thrown into the coroutine!');
} catch (P\RejectionException $e) {
throw new \Exception('foo');
}
});
$promise->otherwise(function ($value) use (&$result) { $result = $value; });
P\queue()->run();
$this->assertEquals(P\PromiseInterface::REJECTED, $promise->getState());
$this->assertContains('foo', $result->getMessage());
}
public function testCanCatchAndYieldOtherException()
{
$promise = P\coroutine(function () {
try {
yield new P\RejectedPromise('a');
$this->fail('Should have thrown into the coroutine!');
} catch (P\RejectionException $e) {
yield new P\RejectedPromise('foo');
}
});
$promise->otherwise(function ($value) use (&$result) { $result = $value; });
P\queue()->run();
$this->assertEquals(P\PromiseInterface::REJECTED, $promise->getState());
$this->assertContains('foo', $result->getMessage());
}
public function createLotsOfSynchronousPromise()
{
return P\coroutine(function () {
$value = 0;
for ($i = 0; $i < 1000; $i++) {
$value = (yield new P\FulfilledPromise($i));
}
yield $value;
});
}
public function testLotsOfSynchronousDoesNotBlowStack()
{
$promise = $this->createLotsOfSynchronousPromise();
$promise->then(function ($v) use (&$r) { $r = $v; });
P\queue()->run();
$this->assertEquals(999, $r);
}
public function testLotsOfSynchronousWaitDoesNotBlowStack()
{
$promise = $this->createLotsOfSynchronousPromise();
$promise->then(function ($v) use (&$r) { $r = $v; });
$this->assertEquals(999, $promise->wait());
$this->assertEquals(999, $r);
}
private function createLotsOfFlappingPromise()
{
return P\coroutine(function () {
$value = 0;
for ($i = 0; $i < 1000; $i++) {
try {
if ($i % 2) {
$value = (yield new P\FulfilledPromise($i));
} else {
$value = (yield new P\RejectedPromise($i));
}
} catch (\Exception $e) {
$value = (yield new P\FulfilledPromise($i));
}
}
yield $value;
});
}
public function testLotsOfTryCatchingDoesNotBlowStack()
{
$promise = $this->createLotsOfFlappingPromise();
$promise->then(function ($v) use (&$r) { $r = $v; });
P\queue()->run();
$this->assertEquals(999, $r);
}
public function testLotsOfTryCatchingWaitingDoesNotBlowStack()
{
$promise = $this->createLotsOfFlappingPromise();
$promise->then(function ($v) use (&$r) { $r = $v; });
$this->assertEquals(999, $promise->wait());
$this->assertEquals(999, $r);
}
public function testAsyncPromisesWithCorrectlyYieldedValues()
{
$promises = [
new P\Promise(),
new P\Promise(),
new P\Promise()
];
$promise = P\coroutine(function () use ($promises) {
$value = null;
$this->assertEquals('skip', (yield new P\FulfilledPromise('skip')));
foreach ($promises as $idx => $p) {
$value = (yield $p);
$this->assertEquals($value, $idx);
$this->assertEquals('skip', (yield new P\FulfilledPromise('skip')));
}
$this->assertEquals('skip', (yield new P\FulfilledPromise('skip')));
yield $value;
});
$promises[0]->resolve(0);
$promises[1]->resolve(1);
$promises[2]->resolve(2);
$promise->then(function ($v) use (&$r) { $r = $v; });
P\queue()->run();
$this->assertEquals(2, $r);
}
public function testYieldFinalWaitablePromise()
{
$p1 = new P\Promise(function () use (&$p1) {
$p1->resolve('skip me');
});
$p2 = new P\Promise(function () use (&$p2) {
$p2->resolve('hello!');
});
$co = P\coroutine(function() use ($p1, $p2) {
yield $p1;
yield $p2;
});
P\queue()->run();
$this->assertEquals('hello!', $co->wait());
}
public function testCanYieldFinalPendingPromise()
{
$p1 = new P\Promise();
$p2 = new P\Promise();
$co = P\coroutine(function() use ($p1, $p2) {
yield $p1;
yield $p2;
});
$p1->resolve('a');
$p2->resolve('b');
$co->then(function ($value) use (&$result) { $result = $value; });
P\queue()->run();
$this->assertEquals('b', $result);
}
public function testCanNestYieldsAndFailures()
{
$p1 = new P\Promise();
$p2 = new P\Promise();
$p3 = new P\Promise();
$p4 = new P\Promise();
$p5 = new P\Promise();
$co = P\coroutine(function() use ($p1, $p2, $p3, $p4, $p5) {
try {
yield $p1;
} catch (\Exception $e) {
yield $p2;
try {
yield $p3;
yield $p4;
} catch (\Exception $e) {
yield $p5;
}
}
});
$p1->reject('a');
$p2->resolve('b');
$p3->resolve('c');
$p4->reject('d');
$p5->resolve('e');
$co->then(function ($value) use (&$result) { $result = $value; });
P\queue()->run();
$this->assertEquals('e', $result);
}
public function testCanYieldErrorsAndSuccessesWithoutRecursion()
{
$promises = [];
for ($i = 0; $i < 20; $i++) {
$promises[] = new P\Promise();
}
$co = P\coroutine(function() use ($promises) {
for ($i = 0; $i < 20; $i += 4) {
try {
yield $promises[$i];
yield $promises[$i + 1];
} catch (\Exception $e) {
yield $promises[$i + 2];
yield $promises[$i + 3];
}
}
});
for ($i = 0; $i < 20; $i += 4) {
$promises[$i]->resolve($i);
$promises[$i + 1]->reject($i + 1);
$promises[$i + 2]->resolve($i + 2);
$promises[$i + 3]->resolve($i + 3);
}
$co->then(function ($value) use (&$result) { $result = $value; });
P\queue()->run();
$this->assertEquals('19', $result);
}
public function testCanWaitOnPromiseAfterFulfilled()
{
$f = function () {
static $i = 0;
$i++;
return $p = new P\Promise(function () use (&$p, $i) {
$p->resolve($i . '-bar');
});
};
$promises = [];
for ($i = 0; $i < 20; $i++) {
$promises[] = $f();
}
$p = P\coroutine(function () use ($promises) {
yield new P\FulfilledPromise('foo!');
foreach ($promises as $promise) {
yield $promise;
}
});
$this->assertEquals('20-bar', $p->wait());
}
public function testCanWaitOnErroredPromises()
{
$p1 = new P\Promise(function () use (&$p1) { $p1->reject('a'); });
$p2 = new P\Promise(function () use (&$p2) { $p2->resolve('b'); });
$p3 = new P\Promise(function () use (&$p3) { $p3->resolve('c'); });
$p4 = new P\Promise(function () use (&$p4) { $p4->reject('d'); });
$p5 = new P\Promise(function () use (&$p5) { $p5->resolve('e'); });
$p6 = new P\Promise(function () use (&$p6) { $p6->reject('f'); });
$co = P\coroutine(function() use ($p1, $p2, $p3, $p4, $p5, $p6) {
try {
yield $p1;
} catch (\Exception $e) {
yield $p2;
try {
yield $p3;
yield $p4;
} catch (\Exception $e) {
yield $p5;
yield $p6;
}
}
});
$res = P\inspect($co);
$this->assertEquals('f', $res['reason']);
}
public function testCoroutineOtherwiseIntegrationTest()
{
$a = new P\Promise();
$b = new P\Promise();
$promise = P\coroutine(function () use ($a, $b) {
yield $a;
yield $b;
})->otherwise(function (\Exception $e) {
throw new \OutOfBoundsException('a', 0, $e);
});
$a->resolve('a');
$b->reject('b');
$reason = P\inspect($promise)['reason'];
$this->assertInstanceOf('OutOfBoundsException', $reason);
$this->assertInstanceOf('GuzzleHttp\Promise\RejectionException', $reason->getPrevious());
}
}