What could be the issue when trying to use the `jest update snapshot` with `-u` or `--updateSnapshot` flags?

General Discussions
1

What could be the issue when trying to use the jest update snapshot command with the -u or --updateSnapshot flags in my npm run test command?

I’m trying to add the -u parameter to update my Jest snapshots, like this:

npm run test ComponentName.spec.js -u

or:

npm run test ComponentName.spec.js --updateSnapshot

However, it’s not working. Here’s my package.json script setup:

"scripts": {
"test": "vue-cli-service test:unit"
}

I know I can delete the snapshot files manually, but I’d like to figure out why this command isn’t working as expected.

2

Hi,

You can use npm run test – -u

This command works because it passes the -u flag correctly to Jest, ensuring that the snapshots are updated during the test run.

3

You can try adding an updateSnapshot option in your Jest configuration file. This allows for automatic snapshot updates without manually passing the flag.