npm install --save-dev unleash-client
pip install UnleashClient

import { initialize } from 'unleash-client';

const unleash = initialize({
  url: 'http://localhost:4242/api/',
  appName: 'test-app',
  disableMetrics: true,        // No metrics upload
  disablePolling: true,        // No background polling
  bootstrap: {
    data: [
      {
        name: 'show-new-ui',
        enabled: true,
        strategies: [
          { name: 'default' },
        ],
      },
    ],
  },
});

// Wait for initialization
await new Promise<void>((resolve) => unleash.once('synchronized', resolve));

test('flag enabled', () => {
  expect(unleash.isEnabled('show-new-ui')).toBe(true);
});

test('flag with context', () => {
  expect(unleash.isEnabled('premium-only', { userId: 'u1', properties: { tier: 'premium' } })).toBe(true);
});

import { Strategy } from 'unleash-client';

class TenantStrategy extends Strategy {
  constructor() { super('tenantStrategy'); }
  isEnabled(parameters: any, context: any): boolean {
    const allowedTenants = (parameters.tenants ?? '').split(',');
    return allowedTenants.includes(context.tenantId);
  }
}

const unleash = initialize({
  url: '...',
  appName: 'test',
  strategies: [new TenantStrategy()],
  bootstrap: {
    data: [
      {
        name: 'flag-x',
        enabled: true,
        strategies: [{ name: 'tenantStrategy', parameters: { tenants: 'A,B' } }],
      },
    ],
  },
});

test('strategy allows tenant A', () => {
  expect(unleash.isEnabled('flag-x', { tenantId: 'A' })).toBe(true);
});

test('strategy rejects tenant C', () => {
  expect(unleash.isEnabled('flag-x', { tenantId: 'C' })).toBe(false);
});

const unleash = initialize({
  // ...
  bootstrap: {
    data: [
      {
        name: 'gradual-rollout',
        enabled: true,
        strategies: [{ name: 'flexibleRollout', parameters: { rollout: '50', stickiness: 'userId' } }],
      },
    ],
  },
});

test('rollout deterministic per user', () => {
  const r1 = unleash.isEnabled('gradual-rollout', { userId: 'u1' });
  const r2 = unleash.isEnabled('gradual-rollout', { userId: 'u1' });
  expect(r1).toBe(r2);
});

afterAll(() => unleash.destroy());

npm test

jobs:
  unleash-tests:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v5
      - uses: actions/setup-node@v4
      - run: npm ci && npm test