behaviour of test:unit --watch changed?

[doppelreim]

Version

3.0.0-beta.11

Reproduction link

https://github.com/doppelreim/vue-test-app/tree/test-watch-behaviour

Steps to reproduce

Install dependencies: npm install

Run the unit-tests in "watch-mode": ./node_modules/.bin/vue-cli-service test:unit --watch

After they have passed, open "Other.spec.ts" and change something. For example, change the expectation from 8 to 7.

Save the file.

The tests are run again, automatically (because of --watch)

What is expected?

At least in beta6, only the tests contained in the file that changed are run again.

What is actually happening?

In beta12, all tests are run again.

---

I'm not sure, what the actually intended behaviour is. Maybe it should always have been like this. But it is different :)

[yyx990803]

This is fixed also by e17f78c

[Oliboy50]

SEE EDIT MESSAGE BELOW

@yyx990803 the --watch option seems to be broken in the latest release (at least using the cli-plugin-unit-jest)

I tried both from the UI and from my own terminal, and both using npm and yarn:

• the UI outputs nothing, it just waits
• my own terminal outputs Determining test suites to run... and then waits

yarn run v1.7.0
$ vue-cli-service test:unit --watch

    "@vue/cli-plugin-unit-jest": {
      "version": "3.0.0-rc.3",
      "resolved": "https://registry.npmjs.org/@vue/cli-plugin-unit-jest/-/cli-plugin-unit-jest-3.0.0-rc.3.tgz",
      "integrity": "sha512-A+ktUdIL856YEpeUVYH+sxccJsgNQ4LA9zH7qNr1bN7pTPEBA7xTNWYbySucwYbhIex66fuRxzQ6Az6MK/DEyw==",
      "dev": true,
      "requires": {
        "@vue/cli-shared-utils": "^3.0.0-rc.3",
        "babel-jest": "^23.0.1",
        "babel-plugin-transform-es2015-modules-commonjs": "^6.26.2",
        "jest": "^23.1.0",
        "jest-serializer-vue": "^1.0.0",
        "jest-transform-stub": "^1.0.0",
        "vue-jest": "^2.6.0"
      }
    },
    "@vue/cli-service": {
      "version": "3.0.0-rc.3",
...

    "jest": {
      "version": "23.1.0",
...

FYI, when I run the test:unit command without the --watch flag, the tests all run correctly.

EDIT: my bad, it seems to comes from jest itself... because I have the same issue by simply running node_modules/.bin/jest --watch
=> my issue is located here => jestjs/jest#4883 (it works when I use node_modules/.bin/jest --watchAll instead)

[factoidforrest]

what is the solution?

[RickMeijer]

Old issue, but maybe some lone googler can use this: For me running npm run test:unit -- --watch works as expected on a newly instantiated project.

See https://docs.npmjs.com/cli/run-script

npm will pass all the arguments after the -- directly to your script:

[aniforprez]

Trying to send --watch as an option always gives me the following error

Error: `fsevents` unavailable (this watcher can only be used on Darwin)
    at new FSEventsWatcher (/Users/anirudhs/Documents/personal-projects/reddit-saved/node_modules/sane/src/fsevents_watcher.js:41:11)
    at createWatcher (/Users/anirudhs/Documents/personal-projects/reddit-saved/node_modules/jest-haste-map/build/index.js:780:23)
    at Array.map (<anonymous>)
    at HasteMap._watch (/Users/anirudhs/Documents/personal-projects/reddit-saved/node_modules/jest-haste-map/build/index.js:936:44)
    at _buildPromise._buildFileMap.then.then.hasteMap (/Users/anirudhs/Documents/personal-projects/reddit-saved/node_modules/jest-haste-map/build/index.js:355:23)
    at process._tickCallback (internal/process/next_tick.js:68:7)

[ezpzlmnsqz1337]

Old issue, but maybe some lone googler can use this: For me running npm run test:unit -- --watch works as expected on a newly instantiated project.

See https://docs.npmjs.com/cli/run-script

npm will pass all the arguments after the -- directly to your script:

This worked for me, after 1 day of trying almost everything, this finally worked!

EDIT: Funny, I have to have in package.json "test:unit": "vue-cli-service test:unit" and run it like npm run test:unit -- --watch, if I put the parameters in the test:unit script directly in package json, it is not working.

EDIT2: My bad, "test:unit": "vue-cli-service test:unit --watch" works just fine

[aniforprez]

Yo thanks for reminding me. The error fixed itself when I reinstalled the supported version of jest. I'm happy you found this after 1 day. I tried so many things for 2 days until I found this ridiculously simple solution. I felt like a fool 😭

[baamenabar]

I just added "test:unit:watch": "vue-cli-service test:unit --watch" to the scripts section in my package.json, works like a charm.