[EventDispatcher] Fix removing listeners when using first-class callable syntax

Author: javer

Debug/TraceableEventDispatcher.php

@@ -75,7 +75,7 @@ public function removeListener($eventName, $listener)
     {
         if (isset($this->wrappedListeners[$eventName])) {
             foreach ($this->wrappedListeners[$eventName] as $index => $wrappedListener) {
-                if ($wrappedListener->getWrappedListener() === $listener) {
+                if ($wrappedListener->getWrappedListener() === $listener || ($listener instanceof \Closure && $wrappedListener->getWrappedListener() == $listener)) {
                     $listener = $wrappedListener;
                     unset($this->wrappedListeners[$eventName][$index]);
                     break;
@@ -110,8 +110,8 @@ public function getListenerPriority($eventName, $listener)
         // we might have wrapped listeners for the event (if called while dispatching)
         // in that case get the priority by wrapper
         if (isset($this->wrappedListeners[$eventName])) {
-            foreach ($this->wrappedListeners[$eventName] as $index => $wrappedListener) {
-                if ($wrappedListener->getWrappedListener() === $listener) {
+            foreach ($this->wrappedListeners[$eventName] as $wrappedListener) {
+                if ($wrappedListener->getWrappedListener() === $listener || ($listener instanceof \Closure && $wrappedListener->getWrappedListener() == $listener)) {
                     return $this->dispatcher->getListenerPriority($eventName, $wrappedListener);
                 }
             }

EventDispatcher.php

@@ -122,7 +122,7 @@ public function getListenerPriority($eventName, $listener)
                     $v[0] = $v[0]();
                     $v[1] = $v[1] ?? '__invoke';
                 }
-                if ($v === $listener) {
+                if ($v === $listener || ($listener instanceof \Closure && $v == $listener)) {
                     return $priority;
                 }
             }
@@ -178,7 +178,7 @@ public function removeListener($eventName, $listener)
                     $v[0] = $v[0]();
                     $v[1] = $v[1] ?? '__invoke';
                 }
-                if ($v === $listener) {
+                if ($v === $listener || ($listener instanceof \Closure && $v == $listener)) {
                     unset($listeners[$k], $this->sorted[$eventName], $this->optimized[$eventName]);
                 }
             }

Tests/EventDispatcherTest.php

@@ -421,6 +421,35 @@ public function testMutatingWhilePropagationIsStopped()
         $this->assertTrue($testLoaded);
     }
 
+    /**
+     * @requires PHP 8.1
+     */
+    public function testNamedClosures()
+    {
+        $listener = new TestEventListener();
+
+        $callback1 = \Closure::fromCallable($listener);
+        $callback2 = \Closure::fromCallable($listener);
+        $callback3 = \Closure::fromCallable(new TestEventListener());
+
+        $this->assertNotSame($callback1, $callback2);
+        $this->assertNotSame($callback1, $callback3);
+        $this->assertNotSame($callback2, $callback3);
+        $this->assertTrue($callback1 == $callback2);
+        $this->assertFalse($callback1 == $callback3);
+
+        $this->dispatcher->addListener('foo', $callback1, 3);
+        $this->dispatcher->addListener('foo', $callback2, 2);
+        $this->dispatcher->addListener('foo', $callback3, 1);
+
+        $this->assertSame(3, $this->dispatcher->getListenerPriority('foo', $callback1));
+        $this->assertSame(3, $this->dispatcher->getListenerPriority('foo', $callback2));
+
+        $this->dispatcher->removeListener('foo', $callback1);
+
+        $this->assertSame(['foo' => [$callback3]], $this->dispatcher->getListeners());
+    }
+
     /**
      * @group legacy
      * @expectedDeprecation Calling the "Symfony\Component\EventDispatcher\EventDispatcherInterface::dispatch()" method with the event name as the first argument is deprecated since Symfony 4.3, pass it as the second argument and provide the event object as the first argument instead.