[9.x] Add test for assertListening in EventFake (#41875)

Author: reziamini

tests/Support/SupportTestingEventFakeTest.php

@@ -46,6 +46,20 @@ public function testAssertDispatchedWithClosure()
         });
     }
 
+    public function testAssertListening()
+    {
+        $listener = ListenerStub::class;
+
+        $dispatcher = m::mock(Dispatcher::class);
+        $dispatcher->shouldReceive('getListeners')->andReturn([function ($event, $payload) use ($listener) {
+            return $listener(...array_values($payload));
+        }]);
+
+        $fake = new EventFake($dispatcher);
+
+        $fake->assertListening(EventStub::class, ListenerStub::class);
+    }
+
     public function testAssertDispatchedWithCallbackInt()
     {
         $this->fake->dispatch(EventStub::class);
@@ -145,3 +159,8 @@ class EventStub
 {
     //
 }
+
+class ListenerStub
+{
+    //
+}