const fs = require('fs');
const request = require('supertest');
const { MongoMemoryServer } = require('mongodb-memory-server');
const mongoose = require('mongoose');
jest.mock('~/server/services/Config/loadCustomConfig', () => {
return jest.fn(() => Promise.resolve({}));
});
describe('Server Configuration', () => {
// Increase the default timeout to allow for Mongo cleanup
jest.setTimeout(30_000);
let mongoServer;
let app;
/** Mocked fs.readFileSync for index.html */
const originalReadFileSync = fs.readFileSync;
beforeAll(() => {
fs.readFileSync = function (filepath, options) {
if (filepath.includes('index.html')) {
return 'LibreChat';
}
return originalReadFileSync(filepath, options);
};
});
afterAll(() => {
// Restore original fs.readFileSync
fs.readFileSync = originalReadFileSync;
});
beforeAll(async () => {
mongoServer = await MongoMemoryServer.create();
process.env.MONGO_URI = mongoServer.getUri();
process.env.PORT = '0'; // Use a random available port
app = require('~/server');
// Wait for the app to be healthy
await healthCheckPoll(app);
});
afterAll(async () => {
await mongoServer.stop();
await mongoose.disconnect();
});
it('should return OK for /health', async () => {
const response = await request(app).get('/health');
expect(response.status).toBe(200);
expect(response.text).toBe('OK');
});
it('should not cache index page', async () => {
const response = await request(app).get('/');
expect(response.status).toBe(200);
expect(response.headers['cache-control']).toBe('no-cache, no-store, must-revalidate');
expect(response.headers['pragma']).toBe('no-cache');
expect(response.headers['expires']).toBe('0');
});
it('should return 500 for unknown errors via ErrorController', async () => {
// Testing the error handling here on top of unit tests to ensure the middleware is correctly integrated
// Mock MongoDB operations to fail
const originalFindOne = mongoose.models.User.findOne;
const mockError = new Error('MongoDB operation failed');
mongoose.models.User.findOne = jest.fn().mockImplementation(() => {
throw mockError;
});
try {
const response = await request(app).post('/api/auth/login').send({
email: 'test@example.com',
password: 'password123',
});
expect(response.status).toBe(500);
expect(response.text).toBe('An unknown error occurred.');
} finally {
// Restore original function
mongoose.models.User.findOne = originalFindOne;
}
});
});
// Polls the /health endpoint every 30ms for up to 10 seconds to wait for the server to start completely
async function healthCheckPoll(app, retries = 0) {
const maxRetries = Math.floor(10000 / 30); // 10 seconds / 30ms
try {
const response = await request(app).get('/health');
if (response.status === 200) {
return; // App is healthy
}
} catch (error) {
// Ignore connection errors during polling
}
if (retries < maxRetries) {
await new Promise((resolve) => setTimeout(resolve, 30));
await healthCheckPoll(app, retries + 1);
} else {
throw new Error('App did not become healthy within 10 seconds.');
}
}