@kiwicom/smart-faq/lib/SmartFAQ/helpers/__tests__/functionUtils.test.js

"use strict";

var _functionUtils = require("../functionUtils");

// @flow
describe('functionUtils', function () {
  describe('debounce', function () {
    var fn = jest.fn();
    var time = 200;
    var debouncedFn = (0, _functionUtils.debounce)(fn, time);
    beforeEach(function () {
      jest.resetAllMocks();
    });
    it('debounces when time smaller than timeout', function () {
      debouncedFn();
      debouncedFn();
      debouncedFn();
      expect(fn.mock.calls).toHaveLength(0);
    });
    it('debounces when time greater than timeout', function (done) {
      debouncedFn();
      setTimeout(function () {
        expect(fn.mock.calls).toHaveLength(1);
        done();
      }, time + 10);
    });
  });
});