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<?php
namespace React\Tests\EventLoop;
use React\EventLoop\LoopInterface;
use React\EventLoop\StreamSelectLoop;
class StreamSelectLoopTest extends AbstractLoopTest
{
/**
* @after
*/
protected function tearDownSignalHandlers()
{
parent::tearDown();
if (strncmp($this->getName(false), 'testSignal', 10) === 0 && extension_loaded('pcntl')) {
$this->resetSignalHandlers();
}
}
public function createLoop()
{
return new StreamSelectLoop();
}
public function testStreamSelectTimeoutEmulation()
{
$this->loop->addTimer(
0.05,
$this->expectCallableOnce()
);
$start = microtime(true);
$this->loop->run();
$end = microtime(true);
$interval = $end - $start;
$this->assertGreaterThan(0.04, $interval);
}
public function testStreamSelectReportsWarningForMemoryStream()
{
$stream = fopen('php://memory', 'r+');
$this->loop->addReadStream($stream, $this->expectCallableNever());
$this->loop->futureTick(function () use ($stream) {
$this->loop->futureTick(function () use ($stream) {
$this->loop->removeReadStream($stream);
});
});
$error = null;
$previous = set_error_handler(function ($_, $errstr) use (&$error) {
$error = $errstr;
});
try {
$this->loop->run();
} catch (\ValueError $e) {
// ignore ValueError for PHP 8+ due to empty stream array
}
restore_error_handler();
$this->assertNotNull($error);
$now = set_error_handler(function () { });
restore_error_handler();
$this->assertEquals($previous, $now);
}
public function testStreamSelectThrowsWhenCustomErrorHandlerThrowsForMemoryStream()
{
$stream = fopen('php://memory', 'r+');
$this->loop->addReadStream($stream, $this->expectCallableNever());
$this->loop->futureTick(function () use ($stream) {
$this->loop->futureTick(function () use ($stream) {
$this->loop->removeReadStream($stream);
});
});
$previous = set_error_handler(function ($_, $errstr) {
throw new \RuntimeException($errstr);
});
$e = null;
try {
$this->loop->run();
restore_error_handler();
$this->fail();
} catch (\RuntimeException $e) {
restore_error_handler();
} catch (\ValueError $e) {
restore_error_handler(); // PHP 8+
$e = $e->getPrevious();
}
$this->assertInstanceOf(\RuntimeException::class, $e);
$now = set_error_handler(function () { });
restore_error_handler();
$this->assertEquals($previous, $now);
}
public function signalProvider()
{
yield ['SIGUSR1'];
yield ['SIGHUP'];
yield ['SIGTERM'];
}
/**
* Test signal interrupt when no stream is attached to the loop
* @dataProvider signalProvider
* @requires extension pcntl
* @requires function pcntl_signal()
* @requires function pcntl_signal_dispatch()
*/
public function testSignalInterruptNoStream($signal)
{
// dispatch signal handler every 10ms for 0.1s
$check = $this->loop->addPeriodicTimer(0.01, function() {
pcntl_signal_dispatch();
});
$this->loop->addTimer(0.1, function () use ($check) {
$this->loop->cancelTimer($check);
});
$handled = false;
$this->assertTrue(pcntl_signal(constant($signal), function () use (&$handled) {
$handled = true;
}));
// spawn external process to send signal to current process id
$this->forkSendSignal($signal);
$this->loop->run();
$this->assertTrue($handled);
}
/**
* Test signal interrupt when a stream is attached to the loop
* @dataProvider signalProvider
* @requires extension pcntl
* @requires function pcntl_signal()
* @requires function pcntl_signal_dispatch()
*/
public function testSignalInterruptWithStream($signal)
{
// dispatch signal handler every 10ms
$this->loop->addPeriodicTimer(0.01, function() {
pcntl_signal_dispatch();
});
// add stream to the loop
list($writeStream, $readStream) = $this->createSocketPair();
$this->loop->addReadStream($readStream, function ($stream) {
/** @var $loop LoopInterface */
$read = fgets($stream);
if ($read === "end loop\n") {
$this->loop->stop();
}
});
$this->loop->addTimer(0.1, function() use ($writeStream) {
fwrite($writeStream, "end loop\n");
});
$handled = false;
$this->assertTrue(pcntl_signal(constant($signal), function () use (&$handled) {
$handled = true;
}));
// spawn external process to send signal to current process id
$this->forkSendSignal($signal);
$this->loop->run();
$this->assertTrue($handled);
}
/**
* reset all signal handlers to default
*/
protected function resetSignalHandlers()
{
foreach($this->signalProvider() as $signal) {
pcntl_signal(constant($signal[0]), SIG_DFL);
}
}
/**
* fork child process to send signal to current process id
*/
protected function forkSendSignal($signal)
{
$currentPid = posix_getpid();
$childPid = pcntl_fork();
if ($childPid == -1) {
$this->fail("Failed to fork child process!");
} else if ($childPid === 0) {
// this is executed in the child process
usleep(20000);
posix_kill($currentPid, constant($signal));
die();
}
}
}