test-bear-raw.ts

test('requirement', () => {
  // ----------------------------
  // Initialization, etc.
  // ----------------------------
  return new Promise((resolve, reject) => {
    repo.once('data', () => {
      try {
        const savedFeature = repo.getToggle(feature.name);
        expect(savedFeature.enabled === feature.enabled).toBeTruthy();
        expect(savedFeature.strategies[0].name === feature.strategies[0].name).toBeTruthy();

        const featureToggles = repo.getToggles();
        expect(featureToggles[0].name).toEqual('feature');

        const featureToggle = repo.getToggle('feature');
        expect(featureToggle).toBeTruthy();
        resolve()
      } catch (err) {
        reject(err)
      }
    })
  })
})

test-bear-structured.ts

// This can be in test-helper.ts
function testEventOnce(eventEmitter: EventEmitter, eventName: string, callback: () => void) {
  return new Promise((resolve, reject) => {
    eventEmitter.once(eventName, async () => {
      try {
        callback()
        resolve()
      } catch (err) {
        reject(err)
      }
    })
  })
}

// actual test
test('same thing', () => {
  // Noted that this can be either await or return
  return testEventOnce(repo, 'data', () => {
    // Do things here
  })
})