[Vuejs]-How to test the access of protected route guard with in Vuejs?

Thank logan for the link. It seems like the best possible solution:

As of now there is no easy way to test navigation guards. If you want to simulate the event triggering by calling router.push function, you are going to have a hard time. A better easier solution is to call the guard manually in beforeEach(), but even this solution doesn’t have a clean approach. See the following example:

beforeRouteEnter

// my-view.js
class MyView extends Vue {
  beforeRouteEnter (to, from, next) {
    next(function (vm) {
      vm.entered = true;
    });
  }
}
// my-view.spec.js
it('should trigger beforeRouteEnter event', function () {
  const view = mount(MyView);
  const spy = sinon.spy(view.vm.$options.beforeRouteEnter, '0'); // you can't just call view.vm.beforeRouteEnter(). The function exists only in $options object.

  const from = {}; // mock 'from' route
  const to = {}; // mock 'to' route
  view.vm.$options.beforeRouteEnter[0](to, from, cb => cb(view.vm));

  expect(view.vm.entered).to.be.true;
  expect(spy).to.have.been.called;
});