Use TUS utilities for backup upload

ts/test-node/util/uploads/helpers.ts

@@ -65,7 +65,7 @@ export class TestServer extends EventEmitter {
       typeof address === 'object' && address != null,
       'address must be an object'
     );
-    return `http://localhost:${address.port}/}`;
+    return `http://localhost:${address.port}/`;
   }
 
   respondWith(status: number, headers: OutgoingHttpHeaders = {}): void {

ts/test-node/util/uploads/tusProtocol_test.ts

@@ -146,7 +146,7 @@ describe('tusProtocol', () => {
         }),
       });
       assert.strictEqual(result, false);
-      assert.strictEqual(caughtError?.message, 'fetch failed');
+      assert.strictEqual(caughtError?.message, 'test');
     });
   });
 
@@ -317,7 +317,7 @@ describe('tusProtocol', () => {
         }),
       });
       assert.strictEqual(result, false);
-      assert.strictEqual(caughtError?.message, 'fetch failed');
+      assert.strictEqual(caughtError?.message, 'test');
     });
   });
 
@@ -327,7 +327,6 @@ describe('tusProtocol', () => {
     function assertSocketCloseError(error: unknown) {
       // There isn't an equivalent to this chain in assert()
       expect(error, toLogFormat(error))
-        .property('cause')
         .property('code')
         .oneOf(['ECONNRESET', 'UND_ERR_SOCKET']);
     }