Cannot set config on localVue

Version

1.0.0-beta.12

Reproduction link

https://codesandbox.io/s/ovx3l48j3y

Steps to reproduce

1. create a localVue and set an empty warn handler

const silentVue = createLocalVue();
silentVue.config.warnHandler = () => {};

1. Write a test that should not show warnings. In my case I don’t want this test show validation errors, cause I am testing that the correct props are being passed to child component

test.only('computeds are passed as props', () => {
    const wrapper = shallow(App, {
      computed: {
        computedOne: () => 'COMPUTED ONE',
        computedTwo: () => 'COMPUTED TWO',
      },
      localVue: silentVue,
    });
    const component = wrapper.find(ChildComponent);
    expect(component.props()).toEqual({
      foo: 'COMPUTED ONE',
      bar: 'COMPUTED TWO',
    });
  });

What is expected?

Disable warnings for this específic test

What is actually happening?

Showing warnings in console

---

Vue.config.warnHandler = () => {}; works but I want to avoid this in other tests

[vilbergs]

Waking this old thread for a slightly different reason than the original.

Since converting to Vitest I get bombarded with “Download the Vue Devtools extension for a better development experience:” and “You are running Vue in development mode.” warning. I haven’t figured out how to disable these.

It would be great if we could set the config on the localVue object or expose some kind of “setup” function where we can access a reference to the original Vue constructor. One idea is that createLocalVue can accept a callback that exposes the ubnderlying Vue object.

[eddyerburgh]

I can see why you’re confused now. Setting anything in the config of a localVue does not affect the code, because the code still uses the base Vue class config object. I’m not sure what we can do about this, because the config object is set once you require Vue, or once we require Vue in createLocalVue.

Perhaps we could add a setter that warns that setting config on a localVue will not have the desired affect.