76 lines
1.8 KiB
JavaScript
76 lines
1.8 KiB
JavaScript
describe('LineUtil', function () {
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describe('#clipSegment', function () {
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var bounds;
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beforeEach(function () {
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bounds = L.bounds([5, 0], [15, 10]);
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});
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it('clips a segment by bounds', function () {
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var a = new L.Point(0, 0);
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var b = new L.Point(15, 15);
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var segment = L.LineUtil.clipSegment(a, b, bounds);
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expect(segment[0]).to.eql(new L.Point(5, 5));
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expect(segment[1]).to.eql(new L.Point(10, 10));
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var c = new L.Point(5, -5);
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var d = new L.Point(20, 10);
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var segment2 = L.LineUtil.clipSegment(c, d, bounds);
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expect(segment2[0]).to.eql(new L.Point(10, 0));
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expect(segment2[1]).to.eql(new L.Point(15, 5));
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});
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it('uses last bit code and reject segments out of bounds', function () {
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var a = new L.Point(15, 15);
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var b = new L.Point(25, 20);
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var segment = L.LineUtil.clipSegment(a, b, bounds, true);
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expect(segment).to.be(false);
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});
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});
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describe('#pointToSegmentDistance & #closestPointOnSegment', function () {
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var p1 = new L.Point(0, 10);
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var p2 = new L.Point(10, 0);
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var p = new L.Point(0, 0);
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it('calculates distance from point to segment', function () {
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expect(L.LineUtil.pointToSegmentDistance(p, p1, p2)).to.eql(Math.sqrt(200) / 2);
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});
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it('calculates point closest to segment', function () {
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expect(L.LineUtil.closestPointOnSegment(p, p1, p2)).to.eql(new L.Point(5, 5));
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});
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});
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describe('#simplify', function () {
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it('simplifies polylines according to tolerance', function () {
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var points = [
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new L.Point(0, 0),
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new L.Point(0.01, 0),
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new L.Point(0.5, 0.01),
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new L.Point(0.7, 0),
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new L.Point(1, 0),
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new L.Point(1.999, 0.999),
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new L.Point(2, 1)
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];
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var simplified = L.LineUtil.simplify(points, 0.1);
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expect(simplified).to.eql([
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new L.Point(0, 0),
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new L.Point(1, 0),
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new L.Point(2, 1)
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]);
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});
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});
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});
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