Merge pull request #161 from smscr/smscr-promise-or-value-fix

Suggestion: when detecting promisable by method presense check its an object

Author: WyriHaximus

src/Internal/CancellationQueue.php

@@ -22,7 +22,7 @@ public function __invoke(): void
 
     public function enqueue($cancellable): void
     {
-        if (!\method_exists($cancellable, 'then') || !\method_exists($cancellable, 'cancel')) {
+        if (!\is_object($cancellable) || !\method_exists($cancellable, 'then') || !\method_exists($cancellable, 'cancel')) {
             return;
         }
 

src/functions.php

@@ -25,7 +25,7 @@ function resolve($promiseOrValue = null): PromiseInterface
         return $promiseOrValue;
     }
 
-    if (\method_exists($promiseOrValue, 'then')) {
+    if (\is_object($promiseOrValue) && \method_exists($promiseOrValue, 'then')) {
         $canceller = null;
 
         if (\method_exists($promiseOrValue, 'cancel')) {