sse.test.ts•4.24 kB
import http from 'http';
import { jest } from '@jest/globals';
import { SSEServerTransport } from './sse.js';
const createMockResponse = () => {
const res = {
writeHead: jest.fn<http.ServerResponse['writeHead']>(),
write: jest.fn<http.ServerResponse['write']>().mockReturnValue(true),
on: jest.fn<http.ServerResponse['on']>(),
};
res.writeHead.mockReturnThis();
res.on.mockReturnThis();
return res as unknown as http.ServerResponse;
};
describe('SSEServerTransport', () => {
describe('start method', () => {
it('should correctly append sessionId to a simple relative endpoint', async () => {
const mockRes = createMockResponse();
const endpoint = '/messages';
const transport = new SSEServerTransport(endpoint, mockRes);
const expectedSessionId = transport.sessionId;
await transport.start();
expect(mockRes.writeHead).toHaveBeenCalledWith(200, expect.any(Object));
expect(mockRes.write).toHaveBeenCalledTimes(1);
expect(mockRes.write).toHaveBeenCalledWith(
`event: endpoint\ndata: /messages?sessionId=${expectedSessionId}\n\n`
);
});
it('should correctly append sessionId to an endpoint with existing query parameters', async () => {
const mockRes = createMockResponse();
const endpoint = '/messages?foo=bar&baz=qux';
const transport = new SSEServerTransport(endpoint, mockRes);
const expectedSessionId = transport.sessionId;
await transport.start();
expect(mockRes.writeHead).toHaveBeenCalledWith(200, expect.any(Object));
expect(mockRes.write).toHaveBeenCalledTimes(1);
expect(mockRes.write).toHaveBeenCalledWith(
`event: endpoint\ndata: /messages?foo=bar&baz=qux&sessionId=${expectedSessionId}\n\n`
);
});
it('should correctly append sessionId to an endpoint with a hash fragment', async () => {
const mockRes = createMockResponse();
const endpoint = '/messages#section1';
const transport = new SSEServerTransport(endpoint, mockRes);
const expectedSessionId = transport.sessionId;
await transport.start();
expect(mockRes.writeHead).toHaveBeenCalledWith(200, expect.any(Object));
expect(mockRes.write).toHaveBeenCalledTimes(1);
expect(mockRes.write).toHaveBeenCalledWith(
`event: endpoint\ndata: /messages?sessionId=${expectedSessionId}#section1\n\n`
);
});
it('should correctly append sessionId to an endpoint with query parameters and a hash fragment', async () => {
const mockRes = createMockResponse();
const endpoint = '/messages?key=value#section2';
const transport = new SSEServerTransport(endpoint, mockRes);
const expectedSessionId = transport.sessionId;
await transport.start();
expect(mockRes.writeHead).toHaveBeenCalledWith(200, expect.any(Object));
expect(mockRes.write).toHaveBeenCalledTimes(1);
expect(mockRes.write).toHaveBeenCalledWith(
`event: endpoint\ndata: /messages?key=value&sessionId=${expectedSessionId}#section2\n\n`
);
});
it('should correctly handle the root path endpoint "/"', async () => {
const mockRes = createMockResponse();
const endpoint = '/';
const transport = new SSEServerTransport(endpoint, mockRes);
const expectedSessionId = transport.sessionId;
await transport.start();
expect(mockRes.writeHead).toHaveBeenCalledWith(200, expect.any(Object));
expect(mockRes.write).toHaveBeenCalledTimes(1);
expect(mockRes.write).toHaveBeenCalledWith(
`event: endpoint\ndata: /?sessionId=${expectedSessionId}\n\n`
);
});
it('should correctly handle an empty string endpoint ""', async () => {
const mockRes = createMockResponse();
const endpoint = '';
const transport = new SSEServerTransport(endpoint, mockRes);
const expectedSessionId = transport.sessionId;
await transport.start();
expect(mockRes.writeHead).toHaveBeenCalledWith(200, expect.any(Object));
expect(mockRes.write).toHaveBeenCalledTimes(1);
expect(mockRes.write).toHaveBeenCalledWith(
`event: endpoint\ndata: /?sessionId=${expectedSessionId}\n\n`
);
});
});
});