ole/src/helper/getIntersectedLinesAndPoint.test.js

OpenLayers Editor

/* eslint-disable import/no-extraneous-dependencies */
import { expect, test, describe, beforeEach } from 'vitest';
import LineString from 'ol/geom/LineString';
import Feature from 'ol/Feature';
import getIntersectedLinesAndPoint from './getIntersectedLinesAndPoint';

describe('getIntersectedLinesAndPoint', () => {
  let map;

  beforeEach(() => {
    // In the test we use pixel as coordinates.
    map = {
      getPixelFromCoordinate: (coord) => coord,
    };
  });

  test('returns empty array because lines are not intersected', () => {
    const line1 = new Feature(
      new LineString([
        [0, 0],
        [1, 1],
      ]),
    );
    const line2 = new Feature(
      new LineString([
        [3, 4],
        [5, 7],
      ]),
    );

    const intersectedLines = getIntersectedLinesAndPoint(
      [0, 0],
      [line1, line2],
      map,
      0,
    );

    expect(intersectedLines).toEqual([]);
  });

  test('returns empty array because the tolerance is not big enough', () => {
    const line1 = new Feature(
      new LineString([
        [0, 0],
        [1, 1],
      ]),
    );
    const line2 = new Feature(
      new LineString([
        [0, 1],
        [1, 0],
      ]),
    );

    const intersectedLines = getIntersectedLinesAndPoint(
      [0, 0],
      [line1, line2],
      map,
      0,
    );

    expect(intersectedLines).toEqual([]);
  });

  test('returns intersected lines and the intersection point', () => {
    const line1 = new Feature(
      new LineString([
        [0, 0],
        [1, 1],
      ]),
    );
    const line2 = new Feature(
      new LineString([
        [0, 1],
        [1, 0],
      ]),
    );

    const intersectedLines = getIntersectedLinesAndPoint(
      [0, 0],
      [line1, line2],
      map,
      1,
    );
    expect(intersectedLines[0]).toBe(line1);
    expect(intersectedLines[1]).toBe(line2);
    expect(intersectedLines[2].getGeometry().getCoordinates()).toEqual([
      0.5, 0.5,
    ]);
  });
});