react-gantt-timeline/src/lib/components/links/CreateLink.spec.js

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import React from 'react';
import CreateLink from './CreateLink';
import { shallow } from 'enzyme';

describe('Testing Firing Events ', function() {
  it('Initialise Properly and not null pointer', () => {
    let position = { x: 10, y: 10 };
    const wrapper = shallow(<CreateLink start={position} />);
    expect(wrapper.instance().lastX).toBe(-1);
    expect(wrapper.instance().lastY).toBe(-1);
    expect(wrapper.state().x).toBe(10);
    expect(wrapper.state().y).toBe(10);
    expect(wrapper.instance().init).toBe(false);
  });

  it('It handle mousmove and mouse up', () => {
    let onFinishCreateLink = jest.fn();
    let position = { x: 10, y: 10 };
    const wrapper = shallow(<CreateLink start={position} onFinishCreateLink={onFinishCreateLink} />);
    wrapper.instance().doMouseMove({ clientX: 1, clientY: 2 });
    expect(wrapper.instance().lastX).toBe(1);
    expect(wrapper.instance().lastY).toBe(2);
    expect(wrapper.state().x).toBe(10);
    expect(wrapper.state().y).toBe(10);
    expect(wrapper.instance().init).toBe(true);
    wrapper.instance().doMouseMove({ clientX: 2, clientY: 3 });
    expect(wrapper.state().x).toBe(11);
    expect(wrapper.state().y).toBe(11);
    wrapper.instance().doMouseUp();
    expect(onFinishCreateLink.mock.calls.length).toBe(1);
  });
});

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