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amp/test/Future/RaceTest.php

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<?php
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namespace Amp\Future;
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use Amp\CancelledException;
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use Amp\DeferredFuture;
use Amp\Future;
use Amp\TimeoutCancellation;
use PHPUnit\Framework\TestCase;
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use Revolt\EventLoop;
class RaceTest extends TestCase
{
public function testSingleComplete(): void
{
self::assertSame(42, race([Future::complete(42)]));
}
public function testTwoComplete(): void
{
self::assertSame(1, Future\race([Future::complete(1), Future::complete(2)]));
}
public function testTwoFirstPending(): void
{
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$deferred = new DeferredFuture;
self::assertSame(2, Future\race([$deferred->getFuture(), Future::complete(2)]));
}
public function testTwoFirstThrowing(): void
{
$this->expectException(\Exception::class);
$this->expectExceptionMessage('foo');
race([Future::error(new \Exception('foo')), Future::complete(2)]);
}
public function testTwoGeneratorThrows(): void
{
$this->expectException(\Exception::class);
$this->expectExceptionMessage('foo');
race((static function () {
yield Future::error(new \Exception('foo'));
yield Future::complete(2);
})());
}
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public function testCancellation(): void
{
$this->expectException(CancelledException::class);
$deferreds = \array_map(function (int $value) {
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$deferred = new DeferredFuture;
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EventLoop::delay($value / 10, fn () => $deferred->complete($value));
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return $deferred;
}, \range(1, 3));
race(\array_map(
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fn (DeferredFuture $deferred) => $deferred->getFuture(),
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$deferreds
), new TimeoutCancellation(0.05));
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}
public function testCompleteBeforeCancellation(): void
{
$deferreds = \array_map(function (int $value) {
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$deferred = new DeferredFuture;
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EventLoop::delay($value / 10, fn () => $deferred->complete($value));
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return $deferred;
}, \range(1, 3));
self::assertSame(1, race(\array_map(
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fn (DeferredFuture $deferred) => $deferred->getFuture(),
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$deferreds
), new TimeoutCancellation(0.2)));
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}
}