import { describe, expect, beforeEach, it, vi } from 'vitest';
import { ContainerType } from './Container';
import { makeTestableContainer } from './Container.test';
import { Line } from './Line';
import { Points } from './Points';

describe('Line', () => {
  let line: Line, container: ContainerType, points: Points;

  beforeEach(() => {
    ({ container } = makeTestableContainer());
    points = new Points();
    line = new Line(container, points);
  });

  it('Line adds point when new point is added', () => {
    points.addPoint(0, 0.4);
    const toRemove = points.addPoint(0, 0.5);
    points.addPoint(0, 0.5);
    points.removePoint(toRemove);
    const linePointCount =
      line.element.getAttribute('points')!.split(',').length - 1;
    expect(linePointCount).toBe(3);
  });

  it('remove cleans up Points callback', () => {
    const removeSpy = vi.spyOn(points.eventTarget, 'removeEventListener');
    line.remove();
    expect(removeSpy).toHaveBeenCalled();
  });
});