konva/test/unit/shapes/Spline-test.js

suite('Spline', function () {
  // ======================================================
  test('add splines', function () {
    var stage = addStage();
    var layer = new Konva.Layer();

    var line1 = new Konva.Line({
      points: [73, 160, 340, 23, 500, 109, 300, 109],
      stroke: 'blue',
      strokeWidth: 10,
      lineCap: 'round',
      lineJoin: 'round',
      draggable: true,
      tension: 1,
    });

    var line2 = new Konva.Line({
      points: [73, 160, 340, 23, 500, 109],
      stroke: 'red',
      strokeWidth: 10,
      lineCap: 'round',
      lineJoin: 'round',
      draggable: true,
      tension: 1,
    });

    var line3 = new Konva.Line({
      points: [73, 160, 340, 23],
      stroke: 'green',
      strokeWidth: 10,
      lineCap: 'round',
      lineJoin: 'round',
      draggable: true,
      tension: 1,
    });

    layer.add(line1);
    layer.add(line2);
    layer.add(line3);
    stage.add(layer);

    assert.equal(line1.getClassName(), 'Line');

    var trace = layer.getContext().getTrace();

    //console.log(trace);
    assert.equal(
      trace,
      'clearRect(0,0,578,200);save();lineJoin=round;transform(1,0,0,1,0,0);beginPath();moveTo(73,160);quadraticCurveTo(74.006,54.77,340,23);bezierCurveTo(501.006,3.77,519.038,68.068,500,109);quadraticCurveTo(479.038,154.068,300,109);lineCap=round;lineWidth=10;strokeStyle=blue;stroke();restore();save();lineJoin=round;transform(1,0,0,1,0,0);beginPath();moveTo(73,160);quadraticCurveTo(74.006,54.77,340,23);quadraticCurveTo(501.006,3.77,500,109);lineCap=round;lineWidth=10;strokeStyle=red;stroke();restore();save();lineJoin=round;transform(1,0,0,1,0,0);beginPath();moveTo(73,160);lineTo(340,23);lineCap=round;lineWidth=10;strokeStyle=green;stroke();restore();'
    );
  });

  // ======================================================
  test('update spline points', function () {
    var stage = addStage();
    var layer = new Konva.Layer();

    var spline = new Konva.Line({
      points: [73, 160, 340, 23, 500, 109, 300, 109],
      stroke: 'blue',
      strokeWidth: 10,
      lineCap: 'round',
      lineJoin: 'round',
      draggable: true,
      tension: 1,
    });

    layer.add(spline);
    stage.add(layer);

    assert.equal(spline.getTensionPoints().length, 12);

    spline.setPoints([73, 160, 340, 23, 500, 109]);

    assert.equal(spline.getTensionPoints().length, 6);

    layer.draw();
  });

  // ======================================================
  test('add point to spline points', function () {
    var stage = addStage();
    var layer = new Konva.Layer();

    var spline = new Konva.Line({
      points: [73, 160, 340, 23, 500, 109, 300, 109],
      stroke: 'blue',
      strokeWidth: 10,
      lineCap: 'round',
      lineJoin: 'round',
      draggable: true,
      tension: 1,
    });

    layer.add(spline);
    stage.add(layer);

    assert.equal(spline.getPoints().length, 8);

    var points = spline.getPoints();
    points.push(300);
    points.push(200);
    spline.clearCache();

    assert.equal(spline.getPoints().length, 10);

    layer.draw();
  });
});