#quasar/extras/mdi-v4 jest unit testing failing on Unexpected token 'export' - jestjs

Question

I am using the new SVG images. I have created a test for a header that contains a logo, name mdiMenu.
import { mdiMenu } from '#quasar/extras/mdi-v4'
But everything I am running the test: I always get this error:
SyntaxError: Unexpected token 'export'
29 |
30 | <script>
> 31 | import { mdiMenu } from '#quasar/extras/mdi-v4'
Do somebody else have encounter this problem and how can I solve this?
This is the rest of the error message:
This usually means that you are trying to import a file which Jest cannot parse, e.g. it's not plain JavaScript.
By default, if Jest sees a Babel config, it will use that to transform your files, ignoring "node_modules".
Here's what you can do:
• To have some of your "node_modules" files transformed, you can specify a custom "transformIgnorePatterns" in your config.
• If you need a custom transformation specify a "transform" option in your config.
• If you simply want to mock your non-JS modules (e.g. binary assets) you can stub them out with the "moduleNameMapper" config option.
You'll find more details and examples of these config options in the docs:
https://jestjs.io/docs/en/configuration.html
Details:
C:\Users\YohnCheung\work\bitBucket\central-station\node_modules\#quasar\extras\mdi-v4\index.js:3
export const mdiAbTesting = 'M4 2A2 2 0 0 0 2 4V12H4V8H6V12H8V4A2 2 0 0 0 6 2H4M4 4H6V6H4M22 15.5V14A2 2 0 0 0 20 12H16V22H20A2 2 0 0 0 22 20V18.5A1.54 1.54 0 0 0 20.5 17A1.54 1.54 0 0 0 22 15.5M20 20H18V18H20V20M20 16H18V14H20M5.79 21.61L4.21 20.39L18.21 2.39L19.79 3.61Z'
^^^^^^
Question was taken from:
https://forum.quasar-framework.org/topic/5459/quasar-extras-mdi-v4-jest-unit-testing-failing
https://forum.vuejs.org/t/quasar-extras-mdi-v4-jest-unit-testing-failing/89973

Answer 1

Correct transformation need to be set.
So you need to configure jest.config.js correctly
...
transform: {
'^.+\\.jsx?$': require.resolve('babel-jest'),
},
...
My jest config is extending preset
preset: '#vue/cli-plugin-unit-jest/presets/typescript-and-babel',
which already includes this transform, but also sets not to transform pacages from node_modules
transformIgnorePatterns: ['/node_modules/'],
reference: https://github.com/vuejs/vue-cli/blob/dev/packages/%40vue/cli-plugin-unit-jest/presets/default/jest-preset.js
therefore in my config I have changed pattern to
transformIgnorePatterns: ['node_modules/(?!(quasar|quasar/*|#quasar|#quasar/*))'],
so it ignores all packages but quasar's
Hope this answer will help someone :)