Jest safeDescriptors: false property does not exist

[adovlyash]

Hi all,

I'm using computed value in my MobX v6.1.5 store like this (I've shortened implementation for simplicity):

import { observable, action, makeObservable, computed } from 'mobx';

class DrawerStore {
    @observable cursorMode: string = 'Line';

    constructor() {
        makeObservable(this);
    }

    @computed get isHighlightEnabled(): boolean {
        return this.cursorMode === 'Arrow';
    }
}

export default new DrawerStore();

And now I want to test some functionality which uses this store via jest. I've configured jest like this https://mobx.js.org/configuration.html#safedescriptors-boolean and now I want to use spy for drawerStore.isHighlightEnabled:

import drawerStore from 'store/drawerStore';
jest.mock('store/drawerStore');

...
jest.spyOn(drawerStore, 'isHighlightEnabled', 'get').mockReturnValue(true);
...

But I get error: isHighlightEnabled property does not exist

Can anyone please suggest if this functionality works now and maybe provide some example of working tests with spies for store getters?

[mweststrate]

Cause you named it isHighlightEnabled not, isHighlight :)?

[adovlyash]

Sorry. it's a typo. The name in tests is "isHighlightEnabled" too

[adovlyash]

[urugator]

jestjs/jest#9675

[adovlyash]

Hmmm. So it's a jest issue. Thank you!