How can mock variables and functions in a testcase?

ParentComponent.js

import React, {useEffect} from 'react'
import store from '../store_path'
import loadable from '@loadable/component'
import useTokenHook from 'hook_path'

const ChildComponent = loadable(() => import('../childComponent_path'))

export const ParentComponent = () => {
    const token = useTokenHook()
    const [data, setData] = useState({})
    const [showChild, setShowChild] = useState(false)
    const lang = store(state => state.lang)
    const apiCall = store(state => state.apicall)

    const myFn = async() => {
        const res = await apiCall();
        setData(res)
        setShowChild(true)
    }

    useEffect(() => {
        myFn()
    }, [])

    return (
        <>
            {showChild
              ? <ChildComponent data={data} />
              : 'No data found'
            }
        </>
    )
}

I want to write Jest test cases for this component. I am not able to mock store and values from store i.e. lang, apiCall. I want to set some default value to lang and I want to apiCall to return specific value. Also how can I set value setShowChild to true as initial value in test case file?

I tried few approaches to mock store like:

jest.mock('../store_path', () => ({
    lang: 'en',
    apiCall: jest.fn(() => {
        return someValue
     })
}))

Here I am getting error as:

TypeError: (0, _store.default) is not a function

I also tried:

const appStore = jest.mock('../store_path', () => jest.fn())

appStore.mockImplementation(() => ({
  lang: 'en',
  apiCall: jest.fn(() => {
    return someValue
  })
}))

And here I am getting error as:

appStore.mockImplementation is not a function

It looks like you are trying to mock default export in which case it can be mocked something like below

jest.mock('../store_path', () => ({
    default: jest.fn()
              // value for first store() call
              .mockReturnValueOnce('en') 
              // value for second store() call since it's async function
              .mockReturnValueOnce(() => new Promise((resolve) => { resolve('apiReturnVal')}))
}))