Add helper method to determine stray request prevention state (#728)

Co-authored-by: Deeka Wong <8337659+huangdijia@users.noreply.github.com>

src/Factory.php

@@ -323,6 +323,16 @@ public function preventStrayRequests($prevent = true)
         return $this;
     }
 
+    /**
+     * Determine if stray requests are being prevented.
+     *
+     * @return bool
+     */
+    public function preventingStrayRequests()
+    {
+        return $this->preventStrayRequests;
+    }
+
     /**
      * Indicate that an exception should not be thrown if any request is not faked.
      *