import { Visualization } from '../Visualization';

describe('Visualization', () => {
  it('should clean up old graph model', () => {
    const visualization = new Visualization();

    expect(visualization.getElementById('a')).toBeUndefined();
    visualization.fromModel({
      graph: {
        id: 'a',
        type: 'graph'
      }
    });
    const graphA = visualization.getElementById('a');
    expect(graphA).not.toBeUndefined();

    if (!graphA) {
      fail();
      return;
    }

    graphA.destroy = jest.fn();

    visualization.fromModel({
      graph: {
        id: 'b',
        type: 'graph'
      }
    });
    expect(visualization.getElementById('a')).toBeUndefined();
    expect(visualization.getElementById('b')).not.toBeUndefined();
    expect(graphA.destroy).toHaveBeenCalledTimes(1);
  });
});