jest.mock curry function module

add.js

export default a => b => a+b;

module.js

import add from './add';

export default {
    add1: n => add(1)(n),
};

test/module.js

import add from '../add';
import module from '../module';

jest.mock('../add', () => () => jest.fn());

module.add1(6);
expect(add.mock.calls).toHaveLength(1);

this can be called, but add wouldn’t be a mock function, instead add() is a mock function, but the call params were not recorded correctly.

jest.mock('../add', () => () => jest.fn(a => b => a+b));

has also tried this, which doesn’t seem to work correctly as well.

jest.mock('../add', jest.fn(a => b => a+b));

this would throw the inline function error

Is there a correct way to mock curry function at the moment?

[zhenyulin]

don’t think mocking curry function is very straight-forward, had some snippets to stub one from a module:

jest.mock('module', () => ({
	tagService: () => inputFunction => inputFunction,  // doesn't seem curry can be mocked nicely
	metricsAction: jest.fn(inputFunction => inputFunction),
}));

[rickhanlonii]

Hey @zhenyulin! This issue tracker is not a help forum. I’m happy to help more using our discord channel or StackOverflow where there is an active jestjs tag for questions