Mocking a function that has a .then() after it causes error

[steven-twerdochlib]

Hi,
I've got the below mapAction:

methods: {
    ...mapActions('store', ['storeFunction'])
  },

And the following created() function:

created() {
      this.storeFunction()
        .then((response) => {
           ...Do stuff with response
      }
  }

I tried mocking the function storeFunction with the test below but I'm getting the error: Cannot read properties of undefined (reading 'then'):

const actions = {
    storeFunction: () => vi.fn()
  };
  const store = createStore({
    actions
  });