Cannot read properties of undefined (reading 'dark') vuse3 with quasar - jestjs

I was trying to do unit test using jest in vue3 with quasar but getting following error
FAIL tests/T1/views/xyz.spec.ts
● Test suite failed to run
TypeError: Cannot read properties of undefined (reading 'dark')
i used dark and light mode in quasar to change the background color of screen
but getting error of dark
please help me

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