import { describe, it, expect, afterEach } from 'vitest';
import { waitForHttpServer } from '../helpers/test-server.js';
import { createServer, Server } from 'http';
describe('waitForHttpServer', () => {
let server: Server | null = null;
afterEach(async () => {
if (server) {
await new Promise<void>((resolve) => {
server!.close(() => resolve());
});
server = null;
}
});
it('should resolve immediately for running server', async () => {
const port = 3456;
server = createServer();
await new Promise<void>((resolve) => {
server!.listen(port, () => resolve());
});
const start = Date.now();
await waitForHttpServer(port);
const duration = Date.now() - start;
expect(duration).toBeLessThan(50); // Should be very fast
});
it('should retry and eventually succeed for delayed server', async () => {
const port = 3457;
// Start server after a short delay
setTimeout(() => {
server = createServer();
server.listen(port);
}, 20);
await waitForHttpServer(port, 10, 2);
expect(server).not.toBeNull();
});
it('should fail with descriptive error after max attempts', async () => {
const port = 3458; // No server listening
await expect(waitForHttpServer(port, 3, 1)).rejects.toThrow(
/Server not ready after 3 attempts/
);
});
it('should use exponential backoff timing', async () => {
const port = 3459; // No server
const start = Date.now();
try {
await waitForHttpServer(port, 5, 2);
} catch {
// Expected to fail
}
const duration = Date.now() - start;
// 2 + 4 + 8 + 16 = 30ms minimum (exponential delays)
expect(duration).toBeGreaterThanOrEqual(25);
});
});
