Oidc-client jest.mock() is not allowed to reference any out-of-scope variables

Question

I am setting up a test class for my auth service which usings oidc-client.

When attempting to mock the function signinRedirect of oidc-client, I am getting hoisting issues and the following error is being thrown. I understand the problem but don't know how to tackle it.

The module factory of ``jest.mock()`` is not allowed to reference any out-of-scope variables. Invalid variable access: myFunc

const myFunc = jest.fn();

jest.mock('oidc-client', () => ({
    UserManager: () => ({
        signinRedirect: myFunc
    })
}));

describe('oAuth', () => {
    it('should call signin redirect when login is called', () => {
        login();

        expect(myFunc).toHaveBeenCalled();
    });
});

score 2 · Answer 1 · answered Jun 04 '19 at 00:42

Try changing the name of myFunc to mockMyFunc.

If your mock variables are lazy you can prefix them with mock. I took this information from a little section of an error description I got a few minutes ago:

Note: This is a precaution to guard against uninitialized mock variables. If it is ensured that the mock is required lazily, variable names prefixed with mock (case insensitive) are permitted.

Oidc-client jest.mock() is not allowed to reference any out-of-scope variables

1 Answers1