how to reset module imported between tests

by

You have to re-import or re-require your module.
Check the doc or this issue for more information:

https://github.com/facebook/jest/issues/3236

https://facebook.github.io/jest/docs/en/jest-object.html#jestresetmodules

describe('MyModule', () => {
    beforeEach(() => {
        jest.resetModules()
    });

    describe('init', () => {
        const myModule = require('./MyModule');

        it('not throws exception when called', () => {
            expect(() => myModule.init()).not.toThrow();
        });
    })
    describe('do', () => {
        const myModule = require('./MyModule');

        it('throw when not init', () => {
            expect(() => myModule.do()).toThrow();
        });
    })
})

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