mermaid/src/dagre-wrapper/edges.spec.js

import { intersection } from './edges';
import { setLogLevel } from '../logger';

describe('Graphlib decorations', () => {
  let node;
  beforeEach(function () {
    setLogLevel(1);
    node = { x: 171, y: 100, width: 210, height: 184 };
  });

  describe('intersection', function () {
    it('case 1 - intersection on left edge of box', function () {
      const o = { x: 31, y: 143.2257070163421 };
      const i = { x: 99.3359375, y: 100 };
      const int = intersection(node, o, i);
      expect(int.x).toBe(66);
      expect(int.y).toBeCloseTo(122.139);
    });

    it('case 2 - intersection on left edge of box', function () {
      const o = { x: 310.2578125, y: 169.88002060631462 };
      const i = { x: 127.96875, y: 100 };
      const node2 = {
        height: 337.5,
        width: 184.4609375,
        x: 100.23046875,
        y: 176.75,
      };
      const int = intersection(node2, o, i);
      expect(int.x).toBeCloseTo(192.4609375);
      expect(int.y).toBeCloseTo(145.15711441743503);
    });
    it('case 3 - intersection on top of box outside point greater then inside point', function () {
      const o = { x: 157, y: 39 };
      const i = { x: 104, y: 105 };
      const node2 = {
        width: 212,
        x: 114,
        y: 164,
        height: 176,
      };
      const int = intersection(node2, o, i);
      expect(int.x).toBeCloseTo(133.71);
      expect(int.y).toBeCloseTo(76);
      // expect(int.y).toBeCloseTo(67.833)
    });
    it('case 4 - intersection on top of box inside point greater then inside point', function () {
      const o = { x: 144, y: 38 };
      const i = { x: 198, y: 105 };
      const node2 = {
        width: 212,
        x: 114,
        y: 164,
        height: 176,
      };
      const int = intersection(node2, o, i);
      expect(int.x).toBeCloseTo(174.626);
      expect(int.y).toBeCloseTo(76);
      // expect(int.y).toBeCloseTo(67.833)
    });
  });
});