@vergiss/chooks/lib/hooks/useChangedProps/__tests__/index.test.js

React hooks library

"use strict";

import "core-js/modules/es.object.define-property";
Object.defineProperty(exports, "__esModule", {
  value: true
});

var react_hooks_1 = require("@testing-library/react-hooks");

var index_1 = require("../index");

describe('useChangedProps', function () {
  it('should be defined', function () {
    expect(index_1.useChangedProps).toBeDefined();
  });
  it('should invoke callback', function () {
    var props = {
      name: 'coma'
    };
    var callback = jest.fn().mockReturnValue(void 0);
    var hook = react_hooks_1.renderHook(function () {
      return index_1.useChangedProps(props, callback);
    }, {
      initialProps: props
    });
    props = {
      name: 'cc'
    };
    hook.rerender();
    expect(callback).toBeCalledTimes(1);
  });
  it('should not invoke callback', function () {
    var props = {
      name: 'coma'
    };
    var callback = jest.fn().mockReturnValue(void 0);
    var hook = react_hooks_1.renderHook(function () {
      return index_1.useChangedProps(props, callback);
    }, {
      initialProps: props
    });
    hook.rerender();
    expect(callback).toBeCalledTimes(0);
  });
});