I am trying to do a unit test by following the official guide by cloning the demo repository vue-test-utils-getting-started
.
Step to Reproduce
npm test
could see the following error● Validation Error:
Preset @vue/cli-plugin-unit-jest/presets/no-babel/jest-preset.js not found.
Configuration Documentation:
https://facebook.github.io/jest/docs/configuration.html
If cat the file
cat @vue/cli-plugin-unit-jest/presets/no-babel/jest-preset.js
it does display the content meaning that the file does exist in the path
If comment out the line, it works. It seems that the mechanism to load the preset file is buggy. Does any one know how to load the preset correctly?
// jest.config.js
module.exports = {
// this is installed by default, but not working, many people encounters, "not found" but file exists
// preset: '@vue/cli-plugin-unit-jest/presets/no-babel'
}
I just found out the reason.
It is because vue-test-utils-getting-started
using an old version of jest
which found preset
path reading problem. So, updating all the packages to latest will resolve it.
An addition note to the vue-test-utils-getting-started
repository. The last update was 3 years ago. So, in case if anyone encounter similar matters. If using an old repository with node package dependency, the old versions defined inside could be the problem.
Thanks anyway who pay a visit to this question. It is resolved.