jest expect add asymetricMatchers

index.js

const definedProto = {
    $$typeof: Symbol.for('jest.asymmetricMatcher'),

    asymmetricMatch(o) {
        return typeof o !== undefined;
    },

    toAsymmetricMatcher() {
        return 'Defined';
    },

    toString() {
        return 'Defined';
    },
};

const defined = () => {
    return Object.create(definedProto);
};

expect.defined = defined;