provide option to simulate ci for ng test

[robertIsaac]

Command

test

Description

right now sometimes the tests passes locally but fail in the ci
I asked https://stackoverflow.com/q/79902347/2748984 but it seems right now there is no way to have full simulation of the ci locally
the cloest I found is to have vitest-base.config.ts file with

export default defineConfig({
  test: {
    fileParallelism: false,
    sequence: {
      concurrent: false,
    },
    maxConcurrency: 1,
  },
});

and to add to angular.jest

          "options": {
            "runnerConfig": true
          }

to the test
which seems too much to do to just simulate how ng test work in ci

Describe the solution you'd like

to have option --ci for the ng test that simulate how ng test work in ci

Describe alternatives you've considered

to allow the full list of options from vitest namely, since with native vitest you can run

npx vitest --no-file-parallelism --sequence.concurrent=false --maxConcurrency=1

[alan-agius4]

Vitest utilizes specific logic when executed within a CI environment, triggered by standard environment variables. You can manually define the CI variable in your local environment to mimic this automated behavior.

CI=1 ng test

[robertIsaac]

can we at least to document it

[robertIsaac]

because also this doesn't work in windows, and I don't even know what's the correct way to set environment variable there

[alan-agius4]

On Windows to set an env variable you need to use set

set CI=1 && ng test

However, I found that Vitest actually ignores the CI variable for the settings you mentioned above. maxWorkers is purely hardware-driven, automatically adjusting to the available parallelism of whatever OS it's running on. But other than that concurrent and fileParallelism are static and do not change based on the environment.