support for setup and teardown methods

[mattphillips]

support for setup and teardown methods

[mattphillips]

Hey @dainchatel I suspect the issue is because when each is being evaluated the products array is still undefined.

I've knocked up a quick example in a Jest repl here

The example just uses log statements instead of each

describe('test suite', () => {
  let products

  beforeAll(() => {
    products = [['def', '321'], ['abc', '123']]
  })

  describe('in here now', () => {
    console.log('No products', products)
    
    test('this should log the products', () => {
      console.log('Products:', products);
    })
  })
})

As you will see when you run the repl the outer log with be undefined with the one inside of the test being the actual array. This is because Jest is internally preventing the execution of the test callback function until the beforeAll is run.

It appears that the inner describe callback is evaluated immediately but not the nested tests which means the console.log or each function is also evaluated immediately so we are unable to wait on the global setup hooks (beforeAll etc).

I'm not sure there is a way around this unfortunately.

It might be worth asking a question in a core Jest channel to see if a describe block should wait for the beforeAll to finish before being executed?

[dainchatel]

thanks, @mattphillips! I really appreciate your answer. I came to the same conclusion, and may go see what the main jest channel has to say about whether nested describe blocks should wait for a beforeAll. But for deadline's sake, just ended up loading my products synchronously. Since it's not an issue with jest-each I will close. Thanks again-