PHPC-2030: Test observation of commands issued during client destruction

Command monitoring events can only be observed for non-persistent clients freed before RSHUTDOWN.

Author: jmikola

tests/apm/commandStartedEvent-002.phpt

@@ -0,0 +1,42 @@
+--TEST--
+MongoDB\Driver\Monitoring\CommandStartedEvent during mongoc_client_destroy()
+--SKIPIF--
+<?php require __DIR__ . "/../utils/basic-skipif.inc"; ?>
+<?php skip_if_not_libmongoc_crypto(); ?>
+<?php skip_if_not_live(); ?>
+<?php skip_if_server_version('<', '3.6'); ?>
+--FILE--
+<?php
+require_once __DIR__ . "/../utils/basic.inc";
+ 
+class MySubscriber implements MongoDB\Driver\Monitoring\CommandSubscriber
+{ 
+    public function commandStarted(MongoDB\Driver\Monitoring\CommandStartedEvent $event)
+    {
+        printf("Observed commandStarted for %s\n", $event->getCommandName());
+    }
+ 
+    public function commandSucceeded(MongoDB\Driver\Monitoring\CommandSucceededEvent $event) {}
+ 
+    public function commandFailed(MongoDB\Driver\Monitoring\CommandFailedEvent $event) {}
+}
+ 
+$manager = create_test_manager(URI, [], ['disableClientPersistence' => true]);
+
+$singleSubscriber = new MySubscriber();
+$manager->addSubscriber($singleSubscriber);
+ 
+$command = new MongoDB\Driver\Command(['ping' => 1]);
+$manager->executeCommand(DATABASE_NAME, $command);
+
+/* Events dispatched during mongoc_client_destroy can only be observed before
+ * RSHUTDOWN. This means that we must use a non-persistent client and free it
+ * before the script ends. */
+unset($manager);
+
+?>
+===DONE===
+--EXPECT--
+Observed commandStarted for ping
+Observed commandStarted for endSessions
+===DONE===