websocket-integration-testing

Test WebSocket servers with real connections and filesystem validation.

3|1|Updated Nov 1, 2025
One-click install
npx skills add https://github.com/krzemienski/claude-mobile-expo --skill websocket-integration-testing
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: websocket-integration-testing
Source: https://github.com/krzemienski/claude-mobile-expo/tree/main/.claude/skills/websocket-integration-testing
Command: npx skills add https://github.com/krzemienski/claude-mobile-expo --skill websocket-integration-testing

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) components.

What problem does it solve?

Relying on mocked unit tests for WebSocket servers leads to false positives and real-world failures. This Skill enforces rigorous functional testing with real connections and filesystem interactions, guaranteeing that your backend behaves as expected in production.

Core Features & Use Cases

  • No Mocks Principle: Strictly prohibits mocks, ensuring tests validate actual server behavior and integration with the filesystem, not just mock implementations.
  • Real-World Verification: Verifies WebSocket message protocols, tool execution, and actual filesystem changes (e.g., file creation, content updates) for true integration testing.
  • wscat Integration: Uses wscat for direct WebSocket interaction, accurately simulating client behavior without complex test harnesses.
  • Use Case: Execute Gate 3A backend functional tests for your WebSocket server, verifying that every tool call (like write_file) actually creates or modifies files on disk, guaranteeing robust backend functionality and preventing integration bugs.

Quick Start

Use the websocket-integration-testing skill to connect to ws://localhost:3001/ws, send an init_session message, and then verify a session_initialized response.

Frequently Asked Questions about websocket-integration-testing

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I test WebSocket servers without mocks to verify real behavior?

Functional WebSocket testing with real connections validates actual server behavior and filesystem interactions, not mock implementations. This approach verifies message protocols, session management, and tool execution end-to-end, catching integration bugs that mocked unit tests miss.

Can I use wscat to test WebSocket message protocols and session initialization?

Yes, wscat enables direct WebSocket interaction to simulate client behavior accurately. Connect to your server, send protocol messages like `init_session`, verify responses like `session_initialized`, and confirm filesystem changes without complex test harnesses.

How do I verify that WebSocket tool calls actually modify files on disk?

Integration testing with real WebSocket connections and filesystem validation confirms that tool execution (e.g., `write_file`) creates or modifies files on disk. This guarantees robust backend functionality and prevents integration bugs from reaching production.

What's the difference between mocked WebSocket tests and functional integration tests?

Mocked tests validate mock behavior and often produce false positives; functional integration tests with real WebSocket connections and actual filesystem interactions verify genuine server behavior, protocol compliance, and production-readiness.

When should I use functional WebSocket testing instead of unit tests?

Use functional WebSocket testing for end-to-end verification of message protocols, session management, and filesystem side effects. It's essential when backend behavior, tool execution, and real-world integration matter more than isolated component behavior.

Do I need special setup to test WebSocket servers on localhost?

No special setup is required beyond a running WebSocket server. Connect via `ws://localhost:3001/ws`, send init messages, and verify responses and filesystem changes using wscat and filesystem validation tools.