Jest async setup before each test file












2















I have to do an async setup before each test file in jest (specifically to start a MongoMemoryServer each time).




  1. Using setupFiles isn't working because does not handle async work. Passing a global Promise won't work because I have to set the db uri string before requiring my db module (I don't want to mock it after await a Promise, that's just bad).

  2. The official guide uses testEnvironment and sets up the mongo server with globalSetup. Strangely enough the docs say



Note: TestEnvironment is sandboxed. Each test suite will trigger setup/teardown in their own TestEnvironment.




But that is not true, because setup and teardown are global.



Tests run concurrently, and I need to insert documents in beforeAll in each file and that causes write errors.



I am stunned by the fact that so many people use the Node/MongoDB/jest stack and yet I stumble upon so many problems.



Anyway, thank you!






javascript installation jestjs each







share|improve this question

























  • "because setup and teardown are global" do you mean they run just once instead of running N times?

    – skyboyer
    Nov 13 '18 at 11:35






  • 1





    Yes, they run once

    – RandomDev
    Nov 13 '18 at 12:54
















2















I have to do an async setup before each test file in jest (specifically to start a MongoMemoryServer each time).




  1. Using setupFiles isn't working because does not handle async work. Passing a global Promise won't work because I have to set the db uri string before requiring my db module (I don't want to mock it after await a Promise, that's just bad).

  2. The official guide uses testEnvironment and sets up the mongo server with globalSetup. Strangely enough the docs say



Note: TestEnvironment is sandboxed. Each test suite will trigger setup/teardown in their own TestEnvironment.




But that is not true, because setup and teardown are global.



Tests run concurrently, and I need to insert documents in beforeAll in each file and that causes write errors.



I am stunned by the fact that so many people use the Node/MongoDB/jest stack and yet I stumble upon so many problems.



Anyway, thank you!






javascript installation jestjs each







share|improve this question

























  • "because setup and teardown are global" do you mean they run just once instead of running N times?

    – skyboyer
    Nov 13 '18 at 11:35






  • 1





    Yes, they run once

    – RandomDev
    Nov 13 '18 at 12:54














2












2








2








I have to do an async setup before each test file in jest (specifically to start a MongoMemoryServer each time).




  1. Using setupFiles isn't working because does not handle async work. Passing a global Promise won't work because I have to set the db uri string before requiring my db module (I don't want to mock it after await a Promise, that's just bad).

  2. The official guide uses testEnvironment and sets up the mongo server with globalSetup. Strangely enough the docs say



Note: TestEnvironment is sandboxed. Each test suite will trigger setup/teardown in their own TestEnvironment.




But that is not true, because setup and teardown are global.



Tests run concurrently, and I need to insert documents in beforeAll in each file and that causes write errors.



I am stunned by the fact that so many people use the Node/MongoDB/jest stack and yet I stumble upon so many problems.



Anyway, thank you!






javascript installation jestjs each







share|improve this question
















I have to do an async setup before each test file in jest (specifically to start a MongoMemoryServer each time).




  1. Using setupFiles isn't working because does not handle async work. Passing a global Promise won't work because I have to set the db uri string before requiring my db module (I don't want to mock it after await a Promise, that's just bad).

  2. The official guide uses testEnvironment and sets up the mongo server with globalSetup. Strangely enough the docs say



Note: TestEnvironment is sandboxed. Each test suite will trigger setup/teardown in their own TestEnvironment.




But that is not true, because setup and teardown are global.



Tests run concurrently, and I need to insert documents in beforeAll in each file and that causes write errors.



I am stunned by the fact that so many people use the Node/MongoDB/jest stack and yet I stumble upon so many problems.



Anyway, thank you!






javascript installation jestjs each




javascript installation jestjs each






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 13 '18 at 14:21







RandomDev

















asked Nov 13 '18 at 11:24









RandomDevRandomDev

204




204













  • "because setup and teardown are global" do you mean they run just once instead of running N times?

    – skyboyer
    Nov 13 '18 at 11:35






  • 1





    Yes, they run once

    – RandomDev
    Nov 13 '18 at 12:54



















  • "because setup and teardown are global" do you mean they run just once instead of running N times?

    – skyboyer
    Nov 13 '18 at 11:35






  • 1





    Yes, they run once

    – RandomDev
    Nov 13 '18 at 12:54

















"because setup and teardown are global" do you mean they run just once instead of running N times?

– skyboyer
Nov 13 '18 at 11:35





"because setup and teardown are global" do you mean they run just once instead of running N times?

– skyboyer
Nov 13 '18 at 11:35




1




1





Yes, they run once

– RandomDev
Nov 13 '18 at 12:54





Yes, they run once

– RandomDev
Nov 13 '18 at 12:54












1 Answer
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You're confusing setup/teardown methods of TestEnvironment (which will be executed before/after every test file) with globalSetup/globalTeardown of Jest runner (which will be executed before/after all tests).






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    0














    You're confusing setup/teardown methods of TestEnvironment (which will be executed before/after every test file) with globalSetup/globalTeardown of Jest runner (which will be executed before/after all tests).






    share|improve this answer




























      0














      You're confusing setup/teardown methods of TestEnvironment (which will be executed before/after every test file) with globalSetup/globalTeardown of Jest runner (which will be executed before/after all tests).






      share|improve this answer


























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        0








        0







        You're confusing setup/teardown methods of TestEnvironment (which will be executed before/after every test file) with globalSetup/globalTeardown of Jest runner (which will be executed before/after all tests).






        share|improve this answer













        You're confusing setup/teardown methods of TestEnvironment (which will be executed before/after every test file) with globalSetup/globalTeardown of Jest runner (which will be executed before/after all tests).







        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered Nov 16 '18 at 20:28









        Michał PierzchałaMichał Pierzchała

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