Mercure and WebSocket testing: allow to create several browser instances

src/Client.php

@@ -71,6 +71,11 @@ public function __construct(BrowserManagerInterface $browserManager, ?string $ba
         $this->baseUri = $baseUri;
     }
 
+    public function getBrowserManager(): BrowserManagerInterface
+    {
+        return $this->browserManager;
+    }
+
     public function __destruct()
     {
         $this->quit();
@@ -242,7 +247,7 @@ public function restart()
             $this->webDriver->manage()->deleteAllCookies();
         }
 
-        $this->quit();
+        $this->quit(false);
         $this->start();
     }
 
@@ -334,13 +339,16 @@ public function getWindowHandles()
         return $this->webDriver->getWindowHandles();
     }
 
-    public function quit()
+    public function quit(bool $quitBrowserManager = true)
     {
         if (null !== $this->webDriver) {
             $this->webDriver->quit();
             $this->webDriver = null;
         }
-        $this->browserManager->quit();
+
+        if ($quitBrowserManager) {
+            $this->browserManager->quit();
+        }
     }
 
     public function takeScreenshot($saveAs = null)

src/PantherTestCaseTrait.php

@@ -52,10 +52,15 @@ trait PantherTestCaseTrait
     protected static $goutteClient;
 
     /**
-     * @var PantherClient|null
+     * @var PantherClient|null The primary Panther client instance created
      */
     protected static $pantherClient;
 
+    /**
+     * @var PantherClient[] All Panther clients, the first one is the primary one (aka self::$pantherClient)
+     */
+    protected static $pantherClients = [];
+
     /**
      * @var array
      */
@@ -83,8 +88,14 @@ public static function stopWebServer()
         }
 
         if (null !== self::$pantherClient) {
-            self::$pantherClient->quit();
+            foreach (self::$pantherClients as $i => $pantherClient) {
+                // Stop ChromeDriver only when all sessions are already closed
+                $pantherClient->quit(false);
+            }
+
+            self::$pantherClient->getBrowserManager()->quit();
             self::$pantherClient = null;
+            self::$pantherClients = [];
         }
 
         if (null !== self::$goutteClient) {
@@ -129,16 +140,20 @@ public static function isWebServerStarted()
     }
 
     /**
-     * @param array $options       see {@see $defaultOptions}
-     * @param array $kernelOptions
+     * Creates the primary browser.
+     *
+     * @param array $options see {@see $defaultOptions}
      */
     protected static function createPantherClient(array $options = [], array $kernelOptions = []): PantherClient
     {
-        self::startWebServer($options);
-        if (null === self::$pantherClient) {
-            self::$pantherClient = Client::createChromeClient(null, null, [], self::$baseUri);
+        if (null !== self::$pantherClient) {
+            return self::$pantherClient;
         }
 
+        self::startWebServer($options);
+
+        self::$pantherClients[0] = self::$pantherClient = Client::createChromeClient(null, null, [], self::$baseUri);
+
         if (\is_a(self::class, KernelTestCase::class, true)) {
             static::bootKernel($kernelOptions);
         }
@@ -150,6 +165,18 @@ protected static function createPantherClient(array $options = [], array $kernel
         return self::$pantherClient;
     }
 
+    /**
+     * Creates an additional browser. Convenient to test apps leveraging Mercure or WebSocket (e.g. a chat).
+     */
+    protected static function createAdditionalPantherClient(): PantherClient
+    {
+        if (null === self::$pantherClient) {
+            return self::createPantherClient();
+        }
+
+        return self::$pantherClients[] = self::$pantherClient = new PantherClient(self::$pantherClient->getBrowserManager(), self::$baseUri);
+    }
+
     /**
      * @param array $options       see {@see $defaultOptions}
      * @param array $kernelOptions

tests/ClientTest.php

@@ -265,7 +265,7 @@ public function testCookie(callable $clientFactory, string $type)
     public function testServerPort(callable $clientFactory): void
     {
         $expectedPort = $_SERVER['PANTHER_WEB_SERVER_PORT'] ?? '9080';
-        $client = $clientFactory();
+        $clientFactory();
         $this->assertEquals($expectedPort, \mb_substr(self::$baseUri, -4));
     }
 }

tests/MultiClientsTest.php

@@ -0,0 +1,33 @@
+<?php
+
+/*
+ * This file is part of the Panther project.
+ *
+ * (c) Kévin Dunglas <dunglas@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace Symfony\Component\Panther\Tests;
+
+class MultiClientsTest extends TestCase
+{
+    public function testMultiClient(): void
+    {
+        $client = self::createPantherClient();
+        $client->request('GET', '/cookie.php');
+
+        $crawler = $client->request('GET', '/cookie.php');
+        $this->assertSame('1', $crawler->filter('#barcelona')->text());
+
+        $client2 = self::createAdditionalPantherClient();
+        $crawler2 = $client2->request('GET', '/cookie.php');
+        $this->assertSame('0', $crawler2->filter('#barcelona')->text());
+
+        // Check that the cookie in the other client hasn't changed
+        $this->assertSame('1', $crawler->filter('#barcelona')->text());
+    }
+}