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2026-07-29 16:01
gRPC

Bidirectional Streaming

StreamSubscribeValidateHard
Try Interactive Demo

Description

Full duplex communication: both client and server send message streams.

Test Scenario

// Bidirectional streaming with grpcurl
# Interactive mode
grpcurl -plaintext -d @ \
  localhost:50051 \
  practice.orders.OrderService/ChatSupport

# Type messages and receive responses:
< {"sender": "user", "message": "I have a question"}
> {"sender": "support", "message": "How can I help?"}
< {"sender": "user", "message": "Where is my order?"}
> {"sender": "support", "message": "Checking..."}

Testing Tips

  • •Both sides send and receive independently
  • •Good for chat, gaming, collaborative editing
  • •Complex error handling required
// Playwright API Testing - gRPC (via REST gateway)
import { test, expect } from '@playwright/test';


test('gRPC unary call via gateway', async ({ request }) => {
  const response = await request.post('/api/grpc/UserService/GetUser', {
    data: { id: '1' }
  });


  expect(response.ok()).toBeTruthy();
  const data = await response.json();
  expect(data.user).toBeDefined();
});

Challenge ID: grpc-bidirectional

2 frameworks available