PSR-17 should be available to use Symfony's HttplugClient (#150)

Author: mbabker

src/Strategy/CommonClassesStrategy.php

@@ -8,6 +8,7 @@
 use Http\Client\HttpClient;
 use Http\Discovery\MessageFactoryDiscovery;
 use Http\Discovery\Psr17FactoryDiscovery;
+use Psr\Http\Message\RequestFactoryInterface as Psr17RequestFactory;
 use Http\Message\MessageFactory;
 use Http\Message\MessageFactory\GuzzleMessageFactory;
 use Http\Message\StreamFactory;
@@ -72,7 +73,7 @@ final class CommonClassesStrategy implements DiscoveryStrategy
             ['class' => React::class, 'condition' => React::class],
         ],
         HttpClient::class => [
-            ['class' => SymfonyHttplug::class, 'condition' => SymfonyHttplug::class],
+            ['class' => SymfonyHttplug::class, 'condition' => [SymfonyHttplug::class, Psr17RequestFactory::class]],
             ['class' => Guzzle6::class, 'condition' => Guzzle6::class],
             ['class' => Guzzle5::class, 'condition' => Guzzle5::class],
             ['class' => Curl::class, 'condition' => Curl::class],