Fix Http Client Pool requests that have no response

Fixes an issue when a HTTP Client Pool is used and a request throws a RequestException and there is no response body. Previously this would still return a Response class, with no response code or body. This now considers it a ConnectionException.

src/Illuminate/Http/Client/PendingRequest.php

@@ -1029,7 +1029,7 @@ protected function makePromise(string $method, string $url, array $options = [],
                 });
             })
             ->otherwise(function (OutOfBoundsException|TransferException $e) {
-                if ($e instanceof ConnectException) {
+                if ($e instanceof ConnectException || ($e instanceof RequestException && ! $e->hasResponse())) {
                     $exception = new ConnectionException($e->getMessage(), 0, $e);
 
                     $this->dispatchConnectionFailedEvent(new Request($e->getRequest()), $exception);

tests/Http/HttpClientTest.php

@@ -35,6 +35,7 @@
 use Psr\Http\Message\ResponseInterface;
 use RuntimeException;
 use Symfony\Component\VarDumper\VarDumper;
+use Illuminate\Http\Client\ConnectionException;
 
 class HttpClientTest extends TestCase
 {
@@ -2118,6 +2119,23 @@ public function testRequestCanBeModifiedInRetryCallbackInPool()
         });
     }
 
+    public function testHandleRequestExeptionWithNoResponseInPoolConsideredConnectionException()
+    {
+        $requestException = new \GuzzleHttp\Exception\RequestException('Error', new \GuzzleHttp\Psr7\Request('GET', '/'));
+        $this->factory->fake([
+            'noresponse.com' => new RejectedPromise($requestException)
+        ]);
+
+        $responses = $this->factory->pool(function (Pool $pool) {
+            return [
+                $pool->get('noresponse.com'),
+            ];
+        });
+
+        self::assertInstanceOf(ConnectionException::class, $responses[0]);
+        self::assertSame($requestException, $responses[0]->getPrevious());
+    }
+
     public function testExceptionThrownInRetryCallbackIsReturnedWithoutRetryingInPool()
     {
         $this->factory->fake([