allows Event::assertListening to check for invokable event listeners (#46683)

Author: cosmastech

src/Illuminate/Support/Testing/Fakes/EventFake.php

@@ -94,7 +94,10 @@ public function assertListening($expectedEvent, $expectedListener)
                     if (Str::contains($expectedListener, '@')) {
                         $normalizedListener = Str::parseCallback($expectedListener);
                     } else {
-                        $normalizedListener = [$expectedListener, 'handle'];
+                        $normalizedListener = [
+                            $expectedListener,
+                            method_exists($expectedListener, 'handle') ? 'handle' : '__invoke',
+                        ];
                     }
                 }
             }

tests/Integration/Events/EventFakeTest.php

@@ -147,6 +147,7 @@ public function testAssertListening()
             'Illuminate\\Tests\\Integration\\Events\\PostAutoEventSubscriber@handle',
             PostEventSubscriber::class,
             [PostEventSubscriber::class, 'foo'],
+            InvokableEventSubscriber::class,
         ]);
 
         foreach ($listenersOfSameEventInRandomOrder as $listener) {
@@ -172,6 +173,7 @@ public function testAssertListening()
         Event::assertListening(NonImportantEvent::class, Closure::class);
         Event::assertListening('eloquent.saving: '.Post::class, PostObserver::class.'@saving');
         Event::assertListening('eloquent.saving: '.Post::class, [PostObserver::class, 'saving']);
+        Event::assertListening('event', InvokableEventSubscriber::class);
     }
 }
 
@@ -231,3 +233,11 @@ public function saving(Post $post)
         $post->slug = sprintf('%s-Test', $post->title);
     }
 }
+
+class InvokableEventSubscriber
+{
+    public function __invoke($event)
+    {
+        //
+    }
+}