Jest - Sequential Execution of a describe block

Question

I'm executing a describe() block using jest. between each test() I'd like to execute code in a synchronous manner, for example:

 describe('matching cities to foods', () => { // Applies only to tests in this describe block beforeEach(() => { return initializeFoodDatabase(); }); const city = getCity(); test('Vienna <3 sausage', () => { expect(isValidCityFoodPair(city, 'Wiener Schnitzel')).toBe(true); }); let city2 = getCity2(); test('San Juan <3 plantains', () => { expect(isValidCityFoodPair(city2, 'Mofongo')).toBe(true); }); }); function getCity(){ return 'Vienna'; } function getCity2(){ return 'San Juan'; } 

What I want is the code to be executed in the following sequence:

1. beforeEach
2. getCity
3. test
4. getCity2
5. test

Currently, the function calls between tests are being executed asynchronously. How is it possible to execute it in a sequential manner?

Answer 1

Maybe you misunderstood beforeEach . The beforeEach block will be called multiple times before each test() . So in your case, to execute tests in the following sequence:

1. beforeEach
2. getCity
3. test1
4. getCity2
5. test2

You can use beforeAll instead then call getCity() and getCity2() in appropriate test block like this:

describe('matching cities to foods', () => {
  // Applies only to tests in this describe block
  beforeAll(() => {
    return initializeFoodDatabase();
  });

  test('Vienna <3 sausage', () => {
    const city = getCity();
    expect(isValidCityFoodPair(city, 'Wiener Schnitzel')).toBe(true);
  });


  test('San Juan <3 plantains', () => {
    const city2 = getCity2();
    expect(isValidCityFoodPair(city2, 'Mofongo')).toBe(true);
  });
});

Check the docs for more info: https://jestjs.io/docs/en/setup-teardown