test: replace setTimeout with promise handling for stream completion

Previously, the test used a fixed 1000ms timeout to call `done()` after handling the stream response. This approach was error-prone as the stream processing time might vary, potentially causing flaky tests or unnecessary delays.

Now, the test awaits the promise returned by `handle` (which resolves when stream processing completes) before calling `done()`. This ensures the test only finishes when the stream processing is actually complete, making the test more reliable and responsive to actual processing time.

Author: thisisnkc

src/grpc-clients.test.ts

@@ -170,13 +170,10 @@ describe("clients test", () => {
               },
             });
 
-            // Handle the stream response
-            handle(response2_3, ["1", "3", "4"]);
-
-            // Wait for the stream to complete
-            setTimeout(() => {
+            // Handle the stream response and wait for completion
+            handle(response2_3, ["1", "3", "4"]).then(() => {
               done();
-            }, 1000);
+            });
           });
       });
   });