117 lines
3.7 KiB
JavaScript
117 lines
3.7 KiB
JavaScript
describe("Point", function () {
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describe('constructor', function () {
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it("creates a point with the given x and y", function () {
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var p = new L.Point(1.5, 2.5);
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expect(p.x).to.eql(1.5);
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expect(p.y).to.eql(2.5);
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});
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it("rounds the given x and y if the third argument is true", function () {
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var p = new L.Point(1.3, 2.7, true);
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expect(p.x).to.eql(1);
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expect(p.y).to.eql(3);
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});
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});
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describe('#subtract', function () {
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it('subtracts the given point from this one', function () {
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var a = new L.Point(50, 30),
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b = new L.Point(20, 10);
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expect(a.subtract(b)).to.eql(new L.Point(30, 20));
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});
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});
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describe('#add', function () {
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it('adds given point to this one', function () {
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expect(new L.Point(50, 30).add(new L.Point(20, 10))).to.eql(new L.Point(70, 40));
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});
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});
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describe('#divideBy', function () {
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it('divides this point by the given amount', function () {
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expect(new L.Point(50, 30).divideBy(5)).to.eql(new L.Point(10, 6));
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});
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});
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describe('#multiplyBy', function () {
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it('multiplies this point by the given amount', function () {
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expect(new L.Point(50, 30).multiplyBy(2)).to.eql(new L.Point(100, 60));
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});
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});
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describe('#floor', function () {
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it('returns a new point with floored coordinates', function () {
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expect(new L.Point(50.56, 30.123).floor()).to.eql(new L.Point(50, 30));
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expect(new L.Point(-50.56, -30.123).floor()).to.eql(new L.Point(-51, -31));
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});
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});
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describe('#trunc', function () {
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it('returns a new point with truncated coordinates', function () {
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expect(new L.Point(50.56, 30.123).trunc()).to.eql(new L.Point(50, 30));
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expect(new L.Point(-50.56, -30.123).trunc()).to.eql(new L.Point(-50, -30));
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});
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});
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describe('#distanceTo', function () {
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it('calculates distance between two points', function () {
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var p1 = new L.Point(0, 30);
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var p2 = new L.Point(40, 0);
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expect(p1.distanceTo(p2)).to.eql(50.0);
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});
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});
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describe('#equals', function () {
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it('returns true if points are equal', function () {
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var p1 = new L.Point(20.4, 50.12);
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var p2 = new L.Point(20.4, 50.12);
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var p3 = new L.Point(20.5, 50.13);
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expect(p1.equals(p2)).to.be(true);
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expect(p1.equals(p3)).to.be(false);
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});
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});
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describe('#contains', function () {
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it('returns true if the point is bigger in absolute dimensions than the passed one', function () {
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var p1 = new L.Point(50, 30),
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p2 = new L.Point(-40, 20),
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p3 = new L.Point(60, -20),
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p4 = new L.Point(-40, -40);
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expect(p1.contains(p2)).to.be(true);
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expect(p1.contains(p3)).to.be(false);
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expect(p1.contains(p4)).to.be(false);
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});
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});
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describe('#toString', function () {
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it('formats a string out of point coordinates', function () {
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expect(new L.Point(50, 30) + '').to.eql('Point(50, 30)');
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expect(new L.Point(50.1234567, 30.1234567) + '').to.eql('Point(50.123457, 30.123457)');
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});
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});
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describe('L.point factory', function () {
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it('leaves L.Point instances as is', function () {
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var p = new L.Point(50, 30);
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expect(L.point(p)).to.be(p);
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});
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it('creates a point out of three arguments', function () {
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expect(L.point(50.1, 30.1, true)).to.eql(new L.Point(50, 30));
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});
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it('creates a point from an array of coordinates', function () {
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expect(L.point([50, 30])).to.eql(new L.Point(50, 30));
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});
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it("creates a point from an object with x and y properties", function () {
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expect(L.point({x: 50, y: 30})).to.eql(new L.Point(50, 30));
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});
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it('does not fail on invalid arguments', function () {
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expect(L.point(undefined)).to.be(undefined);
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expect(L.point(null)).to.be(null);
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});
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});
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});
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