Unit test fixes

src/networking/packet.js

@@ -24,7 +24,7 @@ export default class packet {
     this.token = token;
   }
 
-  buffer = null;
+  buffer = new Uint8Array(0);
   decode_offset = 0;
   token;
 
@@ -180,9 +180,11 @@ export default class packet {
           ...this.buffer.slice(nonce.length + mac.length),
           ...this.buffer.slice(nonce.length, nonce.length + mac.length),
         ]);
-        this.buffer = Buffer.from(
-          new XChaCha20Poly1305(key).open(nonce, this.buffer, aad)
-        );
+        const result = new XChaCha20Poly1305(key).open(nonce, this.buffer, aad);
+        if (!result) {
+          throw new Error('decryption failed');
+        }
+        this.buffer = Buffer.from(result);
       }
 
       this.buffer = new Uint8Array(this.buffer);