Files
electric-cherry/tests/unit/host-availability.test.ts
T

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TypeScript

import { setImmediate } from 'node:timers/promises';
import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
import { newFixture, type Fixture } from '../helpers/fixture.js';
let fixture: Fixture;
let hostId: string;
const GiB = 1024 ** 3;
const epoch = Date.parse('2026-10-05T12:00:00Z');
const inventory = { protocolVersion: 1, dockerRunning: true, directoriesWritable: true, storageAvailable: 100 * GiB,
cpuCount: 16, cpuUsagePercent: 0, memoryTotal: 64 * GiB, memoryAvailable: 60 * GiB,
runtimeImages: ['image'], libraries: [{ id: 't5-library', state: 'ready' }, { id: 't6-library', state: 'ready' }] };
const t5 = { libraryId: 't5-library', image: 'image', automatic: true };
const t6 = { libraryId: 't6-library', image: 'image', automatic: true };
async function settle() { await setImmediate(); await setImmediate(); }
beforeEach(async () => {
vi.resetModules();
fixture = await newFixture([]);
vi.useFakeTimers({ toFake: ['Date'] }); vi.setSystemTime(epoch);
const hosts = await import('../../src/lib/server/hosts/index.js');
hostId = hosts.createHost({ name: 'Availability host', portMin: 28960, portMax: 28962 }).id;
hosts.enrollHost(hosts.createEnrollment(hostId).token, inventory);
hosts.heartbeat(hostId, inventory);
await settle();
});
afterEach(async () => { vi.restoreAllMocks(); vi.useRealTimers(); await fixture.cleanup(); });
describe('cached launch availability', () => {
it('reads cached estimates without placement, historical scans, or repeated database reads', async () => {
const { db } = await import('../../src/lib/server/db/index.js');
const capacity = await import('../../src/lib/server/hosts/capacity.js');
const { launchAvailability } = await import('../../src/lib/server/hosts/availability.js');
const placement = vi.spyOn(capacity, 'choosePlacement');
const prepare = vi.spyOn(db(), 'prepare');
for (let count = 0; count < 100; count++) {
expect(launchAvailability([t5, t6]).availability).toMatchObject({
updatedAt: new Date(epoch).toISOString(), requested: 2, estimatedAvailable: 2, portsAvailable: 3
});
}
expect(prepare).not.toHaveBeenCalled();
expect(placement).not.toHaveBeenCalled();
});
it('shares CPU, memory and ports across games and refreshes measurements on heartbeat', async () => {
const { heartbeat } = await import('../../src/lib/server/hosts/index.js');
const { launchAvailability } = await import('../../src/lib/server/hosts/availability.js');
heartbeat(hostId, { ...inventory, memoryAvailable: GiB + 500_000_000 });
const limited = launchAvailability([t5, t6]);
expect(limited.availability).toMatchObject({ requested: 2, estimatedAvailable: 1, portsAvailable: 3,
cpuCoresAvailable: 15.2, memoryBytesAvailable: GiB });
expect(limited.warnings.join(' ')).toContain('1 of 2');
vi.setSystemTime(epoch + 15_000);
heartbeat(hostId, { ...inventory, memoryAvailable: 2 * GiB + 500_000_000 });
expect(launchAvailability([t5, t6]).availability).toMatchObject({ estimatedAvailable: 2,
memoryBytesAvailable: 2 * GiB, updatedAt: new Date(epoch + 15_000).toISOString() });
heartbeat(hostId, { ...inventory, cpuUsagePercent: 100 });
expect(launchAvailability([t5]).availability.estimatedAvailable).toBe(0);
});
it('refreshes port reservations and startup queue snapshots after lifecycle events', async () => {
const { reserveHostPort, releaseHostPorts } = await import('../../src/lib/server/hosts/index.js');
const { launchAvailability } = await import('../../src/lib/server/hosts/availability.js');
const { beginDeployment, deploymentStage } = await import('../../src/lib/server/provisioning/history.js');
const { db } = await import('../../src/lib/server/db/index.js');
const limit = launchAvailability([t5]).availability.startupLimit!;
reserveHostPort(hostId, 'reserved', { port: 28960, protocol: 'udp' });
reserveHostPort(hostId, 'reserved', { port: 28960, protocol: 'tcp' });
await settle();
expect(launchAvailability([t5, t6, t5]).availability).toMatchObject({ portsAvailable: 2, estimatedAvailable: 2 });
const active = beginDeployment('t5_zombie_theater_1', 'create');
const queued = beginDeployment('t6_zombie_tranzit_1', 'create');
db().prepare("UPDATE server_deployments SET state='queued' WHERE id=?").run(queued);
deploymentStage(queued, 'Awaiting placement', { checkpoint: { key: 'queued', label: 'Queued for placement' } });
await settle();
expect(launchAvailability([t5]).availability).toMatchObject({ queued: 1, startupSlots: Math.max(0, limit - 1) });
db().prepare("UPDATE server_deployments SET state='done' WHERE id=?").run(active);
releaseHostPorts('reserved');
await settle();
expect(launchAvailability([t5]).availability).toMatchObject({ portsAvailable: 3, startupSlots: limit });
});
it('stops counting a stale host without presenting old measurements as current capacity', async () => {
const { launchAvailability } = await import('../../src/lib/server/hosts/availability.js');
vi.setSystemTime(epoch + 91_000);
const result = launchAvailability([t5]);
expect(result.availability).toMatchObject({ updatedAt: new Date(epoch).toISOString(), estimatedAvailable: 0, portsAvailable: 0 });
expect(result.warnings.join(' ')).toContain('Waiting for an eligible host');
});
it('keeps heartbeats working while provisioning schema is unavailable and refreshes after initialization', async () => {
const { db } = await import('../../src/lib/server/db/index.js');
const { heartbeat } = await import('../../src/lib/server/hosts/index.js');
const { launchAvailability } = await import('../../src/lib/server/hosts/availability.js');
const errors = vi.spyOn(console, 'error');
db().exec('ALTER TABLE native_provisioning RENAME TO unavailable_native_provisioning');
expect(() => heartbeat(hostId, inventory)).not.toThrow();
expect(launchAvailability([t5]).availability.updatedAt).toBeNull();
await settle();
expect(errors).not.toHaveBeenCalled();
db().exec('ALTER TABLE unavailable_native_provisioning RENAME TO native_provisioning');
heartbeat(hostId, inventory);
expect(launchAvailability([t5]).availability).toMatchObject({ estimatedAvailable: 1, portsAvailable: 3 });
});
});