Vue3 Options API + Jest + vue test utils: nested function testing problem

Question

I have Component.vue that i need to test:

Component.vue

<script setup>
const someFunction = () => {
   //...some code i do not want to execute
}

const functionTotest = () => {
   if(someCondition) {
      someFunction()
   }
}

</script>

The purpose of my test (Jest + vue test utils) is to check if functionToTest works ok - does it actually call someFunction if someCondition === true.

I tried mocking someFunction:

const wrapper = mount(Component, {
         global: {
            mocks: {
                someFunction: jest.fn()
            }
         }
})

but then when i call wrapper.vm.functionToTest() it still calls original someFunction() from Component.vue and not the mocked one that I provided in global.mocks. How can i deal with this problem without refactoring Component.vue?