Mock Rclone installation

src/Rclone/Rclone.php

@@ -24,11 +24,17 @@ class Rclone
         try
         {
             $version = $this->exec('--version');
-            $this->version = explode("\n", $version)[0];
         }
         catch(ProcessFailedException $e)
         {
             throw new Exception("Check installation of rclone");
+            return;
+        }
+
+        $this->version = explode("\n", $version)[0];
+        
+        if (!\str_contains($this->version, 'rclone')) {
+            throw new Exception("Rclone not recognized");
         }
     }