I have some tests that interact with a database. I have the test code set to clear out the test table before/after each test. This doesn't work with jest though, since it's running multiple tests in parallel, so it starts another test that clears out the test db while the first one's running!
Is it possible to set jest into a serial mode (without writing my own test runner, which seems complicated)?
Start Jest using the --runInBand CLI option:
jest --runInBand
That option causes Jest to
Run all tests serially in the current process
Related
I am using Vitest as the testing framework for my project.
I have a directory called canRunInParallel which contains multiple test files, like A.spec.ts, B.spec.ts ..... Z.spec.ts. Since this directory contains multiple test files, and none of the tests can race condition, I want to configure Vitest to run all these tests concurrently, so that I can improve my testing time.
Can anyone help me in figuring out how to achieve the same (by most probably modifying the configuration of Vitest runner)?
This functionality is not yet supported by Vitest.
You can only run the tests in a test suite (test file) concurrently using Vitest.
I am using Vitest as my testing framework in a project.
I have multiple test files in the project, let's say A.spec.ts and B.spec.test. I am using the standard test script (vitest run --no-threads --coverage) to test my code. I want to run a certain function (to purge and clean the testing database), before and after all the test suites are run (i.e. before all the tests in A.spec.ts and B.spec.ts, and after them as well).
Is there any way to achieve the same? I read about the methods like beforeAll and afterAll, but they work in the context of a file, and thus do not help with my use case.
you should try global setup
globalsetup
I am new to mocha but experienced in jest. so when I run my test I hope it should display a complete log. but it just says 9 test passed. I am using nyan reporter
here is a screen shot
I recommend using mochawesome reporter and utilizing a .mocharc.js file or .mocharc.json file for your configurations unless you want to run mocha programmatically
I have a test suite and because it contains some expensive tests, I disable some of them for our CI. However once a day, I'd like to run the whole test suite.
The issue is that running against the same set of test files, it causes snapshot failures because when running the whole test suite it is missing some. If I generate them, then the CI fails because it complains about snapshots being removed (i.e. the one from the whole test suite that are not being checked on the CI.)
What would be the proper way to handle this with jest?
Thanks!
I'm using Mocha and Selenium to do an e2e test for my node web app. Now the problem is, I want to tear down databases after the execution of all test cases.
Backend uses two databases - mongo and postgres. I created new empty testing databases of each, just for the e2e testing. During the testing some records are inserted into databases. So, at the end of testing (when mocha test cases which invoke selenium are all executed), I want to tear down the test databases and create new ones. These operations are apparently done by bash commands.
So, is this a good practice and if so, how can I achieve this, like writing bash commands in js file(which execute the mocha test cases)?
A better approach would be to drop tables (and collections) and recreate them via migrations instead of dropping whole database if you have reasonable number of migrations. This has an added advantage of validating your down migrations which can be handy if you had to revert.
You can run migrations (down and then up) at the start of your tests . We are using db-migrate and this is how you can do this in package.json
"scripts": {
"test": "npm run testdb && <test command>",
"testdb": "db-migrate reset --env test && db-migrate up --env test"
}