// Integration Test: MCP Protocol Version Negotiation
// This test validates protocol version negotiation across different transports
// Expected to FAIL until implementation is complete
describe('MCP Protocol Version Negotiation', () => {
it('should negotiate latest protocol version via SSE', async () => {
const clientCapabilities = {};
const requestedVersion = '2025-06-18';
// This will fail until implementation exists
const result = await negotiateProtocolSSE(requestedVersion, clientCapabilities);
expect(result.protocolVersion).toBe('2025-06-18');
expect(result.capabilities).toHaveProperty('tools');
expect(result.capabilities).toHaveProperty('logging');
expect(result.serverInfo).toHaveProperty('name', 'legco-search-mcp');
});
it('should negotiate older protocol version via SSE', async () => {
const clientCapabilities = {};
const requestedVersion = '2024-11-05';
// This will fail until implementation exists
const result = await negotiateProtocolSSE(requestedVersion, clientCapabilities);
expect(result.protocolVersion).toBe('2024-11-05');
expect(result.capabilities).toBeDefined();
});
it('should negotiate latest protocol version via WebSocket', async () => {
const clientCapabilities = {};
const requestedVersion = '2025-06-18';
// This will fail until implementation exists
const result = await negotiateProtocolWebSocket(requestedVersion, clientCapabilities);
expect(result.protocolVersion).toBe('2025-06-18');
expect(result.capabilities).toHaveProperty('tools');
expect(result.capabilities).toHaveProperty('logging');
});
it('should negotiate latest protocol version via HTTP', async () => {
const clientCapabilities = {};
const requestedVersion = '2025-06-18';
// This will fail until implementation exists
const result = await negotiateProtocolHTTP(requestedVersion, clientCapabilities);
expect(result.protocolVersion).toBe('2025-06-18');
expect(result.capabilities).toHaveProperty('tools');
});
it('should reject unsupported protocol versions', async () => {
const clientCapabilities = {};
const requestedVersion = '2020-01-01'; // Very old version
// This will fail until implementation exists
await expect(negotiateProtocolSSE(requestedVersion, clientCapabilities))
.rejects.toThrow('Unsupported protocol version');
});
});
// Mock functions - replace with actual implementation
async function negotiateProtocolSSE(version, capabilities) {
console.log('Negotiating protocol via SSE:', { version, capabilities });
throw new Error('SSE protocol negotiation not implemented');
}
async function negotiateProtocolWebSocket(version, capabilities) {
console.log('Negotiating protocol via WebSocket:', { version, capabilities });
throw new Error('WebSocket protocol negotiation not implemented');
}
async function negotiateProtocolHTTP(version, capabilities) {
console.log('Negotiating protocol via HTTP:', { version, capabilities });
throw new Error('HTTP protocol negotiation not implemented');
}
