mock function code example
Example 1: jest mock mockname
test("mockName", () => {
const mockFn = jest.fn().mockName("mockedFunction");
mockFn();
expect(mockFn).toHaveBeenCalled();
});
Example 2: test function that call a function javascrip
var chai = require('chai');
var expect = chai.expect;
var Foo = require('../lib/foo');
describe('Foo', function () {
it('should set role to \'user\' if role is not valid', function () {
var foo = new Foo({role: 'invalid'});
expect(foo.config.role).to.equal('user');
});
};