Add test for forking failure and lockup of child process

tests/Couchbasev4.test.php

@@ -9,6 +9,7 @@
  * For full copyright and license information, please see the docs/CREDITS.txt and LICENCE files.
  *
  * @author Georges.L (Geolim4)  <[email protected]>
+ * @author Steven Lewis (srjlewis) https://github.com/srjlewis
  * @author Contributors  https://github.com/PHPSocialNetwork/phpfastcache/graphs/contributors
  */
 
@@ -17,7 +18,6 @@
 use Phpfastcache\Exceptions\PhpfastcacheDriverConnectException;
 use Phpfastcache\Helper\Psr16Adapter;
 use Phpfastcache\Tests\Helper\TestHelper;
-use Webmozart\Assert\Assert;
 
 chdir(__DIR__);
 require_once __DIR__ . '/../vendor/autoload.php';
@@ -28,6 +28,37 @@
     $configFileName = __DIR__ . '/Configs/github-actions.php';
 }
 
+$testHelper->printInfoText('Running forking failure process test');
+
+$config = (new CouchbaseConfig(include $configFileName))
+    ->setDoPosixCheck(false)
+    ->setUseStaticItemCaching(false);
+
+$cacheInstance = CacheManager::getInstance('Couchbasev4', $config);
+
+$cache = new Psr16Adapter($cacheInstance);
+$value = random_int(0, 254);
+
+$cache->set('forkFailTestKey', $value);
+
+$pid = pcntl_fork();
+if ($pid == -1) {
+    $testHelper->assertFail('Unable to fork');
+} else if ($pid) {
+    $testHelper->runAsyncProcess('php "'.__DIR__ . '/Scripts/monitor_fork.php" ' . $pid);
+    pcntl_wait($status);
+} else {
+    exit($cache->get('forkFailTestKey'));
+}
+
+if ($value === pcntl_wexitstatus($status)) {
+    $testHelper->assertFail('The fork was a success was meant to lockup');
+} else {
+    $testHelper->assertPass('The forked process locked up has expected');
+}
+
+$testHelper->printInfoText('Running forking success process test');
+
 $config = (new CouchbaseConfig(include $configFileName))
     ->setDoPosixCheck(true)
     ->setUseStaticItemCaching(false);
@@ -37,15 +68,16 @@
 $cache = new Psr16Adapter($cacheInstance);
 $value = random_int(0, 254);
 
-$cache->set('key1', $value);
+$cache->set('forkSuccessTestKey', $value);
 
 $pid = pcntl_fork();
 if ($pid == -1) {
-    die('could not fork');
+    $testHelper->assertFail('Unable to fork');
 } else if ($pid) {
+    $testHelper->runAsyncProcess('php "'.__DIR__ . '/Scripts/monitor_fork.php" ' . $pid);
     pcntl_wait($status);
 } else {
-    exit($cache->get('key1'));
+    exit($cache->get('forkSuccessTestKey'));
 }
 
 if ($value === pcntl_wexitstatus($status)) {
@@ -58,7 +90,6 @@
     $testHelper->runCRUDTests($cacheInstance);
 } catch (PhpfastcacheDriverConnectException $e) {
     $testHelper->assertSkip('Couchbase server unavailable: ' . $e->getMessage());
-    $testHelper->terminateTest();
 }
 $testHelper->terminateTest();
 

tests/Scripts/monitor_fork.php

@@ -0,0 +1,6 @@
+<?php
+$pid = (int)$argv[1] ?? 0;
+sleep(2);
+if (posix_kill($pid, 0)) {
+    posix_kill($pid, SIGKILL);
+}