Fixing failing tests and code style issues.

Author: mxr576

src/Client.php

@@ -2,13 +2,17 @@
 
 namespace Http\Adapter\Guzzle6;
 
+use function Clue\StreamFilter\fun;
+use function foo\func;
 use GuzzleHttp\Client as GuzzleClient;
 use GuzzleHttp\ClientInterface;
 use GuzzleHttp\HandlerStack;
 use GuzzleHttp\Middleware;
 use Http\Client\HttpAsyncClient;
 use Http\Client\HttpClient;
+use Http\Message\Exception;
 use Psr\Http\Message\RequestInterface;
+use Psr\Http\Message\ResponseInterface;
 
 /**
  * HTTP Adapter for Guzzle 6.
@@ -51,7 +55,7 @@ public static function createWithConfig(array $config)
      */
     public function sendRequest(RequestInterface $request)
     {
-        $promise = $this->sendAsyncRequest($request);
+        $promise = $this->sendAsyncRequest($request)->wait();
 
         return $promise->wait();
     }

src/Promise.php

@@ -97,7 +97,7 @@ public function wait($unwrap = true)
         $this->promise->wait(false);
 
         if ($unwrap) {
-            if ($this->getState() == self::REJECTED) {
+            if (self::REJECTED == $this->getState()) {
                 return rejection_for($this->exception);
             }
 

tests/PromiseTest.php

@@ -21,6 +21,6 @@ public function testNonDomainExceptionIsHandled()
 
         $guzzlePromise = new Promise($promise, $request->reveal());
 
-        $guzzlePromise->wait();
+        $guzzlePromise->wait()->wait();
     }
 }