fix(tests): prevent null exception in ConnectionFailed event assertions

Author: saeedhosan

tests/Http/HandlerTest.php

@@ -196,7 +196,9 @@ public function __invoke(RequestInterface $request, array $config)
 
     // Assert Laravel events
     Event::assertDispatched(ConnectionFailed::class, function ($event) {
-        return $event->exception->getMessage() === 'Connection failed';
+        return isset($event->exception)
+            && $event->exception instanceof \Throwable
+            && $event->exception->getMessage() === 'Connection failed';
     });
     Event::assertDispatched(RequestSending::class);
     Event::assertNotDispatched(ResponseReceived::class);

tests/Http/HttpEventTest.php

@@ -35,9 +35,10 @@
     } catch (\GuzzleHttp\Exception\ConnectException $e) {
         // expected
     }
-
     Event::assertDispatched(ConnectionFailed::class, function ($event) {
-        return $event->exception->getMessage() === 'Connection failed';
+        return isset($event->exception)
+            && $event->exception instanceof \Throwable
+            && $event->exception->getMessage() === 'Connection failed';
     });
     Event::assertNotDispatched(RequestSending::class);
     Event::assertNotDispatched(ResponseReceived::class);