[Vuejs]-Mock .get() Function using Jest on VueJS

Assuming you have getPost() defined in the Post component’s methods, you can’t use named imports to access getPost. Instead, you’ll have to mount the component, and use the wrapper’s vm:

// Post.spec.js
import { shallowMount } from '@vue/test-utils'
import Post from '@/views/Post.vue'

it('...', () => {
  const wrapper = shallowMount(Post)
  await wrapper.vm.getPost()
  expect(wrapper.vm.post).toEqual(...)
})

Also make sure to return the axios call in getPost() so that it could be awaited:

// Post.vue
export default {
  methods: {
    getPost() {
      this.refreshToken();
        
      return http.get(/*...*/)
        .then(/*...*/)
        .catch(/*...*/);
    }
  }
}