118 lines
3.4 KiB
JavaScript
118 lines
3.4 KiB
JavaScript
describe('LatLng', function () {
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describe('constructor', function () {
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it("sets lat and lng", function () {
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var a = new L.LatLng(25, 74);
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expect(a.lat).to.eql(25);
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expect(a.lng).to.eql(74);
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var b = new L.LatLng(-25, -74);
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expect(b.lat).to.eql(-25);
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expect(b.lng).to.eql(-74);
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});
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it('throws an error if invalid lat or lng', function () {
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expect(function () {
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var a = new L.LatLng(NaN, NaN);
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}).to.throwError();
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});
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it('does not set altitude if undefined', function () {
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var a = new L.LatLng(25, 74);
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expect(typeof a.alt).to.eql('undefined');
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});
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it('sets altitude', function () {
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var a = new L.LatLng(25, 74, 50);
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expect(a.alt).to.eql(50);
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var b = new L.LatLng(-25, -74, -50);
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expect(b.alt).to.eql(-50);
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});
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});
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describe('#equals', function () {
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it("returns true if compared objects are equal within a certain margin", function () {
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var a = new L.LatLng(10, 20);
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var b = new L.LatLng(10 + 1.0E-10, 20 - 1.0E-10);
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expect(a.equals(b)).to.eql(true);
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});
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it("returns false if compared objects are not equal within a certain margin", function () {
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var a = new L.LatLng(10, 20);
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var b = new L.LatLng(10, 23.3);
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expect(a.equals(b)).to.eql(false);
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});
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it('returns false if passed non-valid object', function () {
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var a = new L.LatLng(10, 20);
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expect(a.equals(null)).to.eql(false);
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});
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});
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describe('#toString', function () {
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it('formats a string', function () {
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var a = new L.LatLng(10.333333333, 20.2222222);
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expect(a.toString(3)).to.eql('LatLng(10.333, 20.222)');
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});
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});
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describe('#distanceTo', function () {
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it('calculates distance in meters', function () {
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var a = new L.LatLng(50.5, 30.5);
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var b = new L.LatLng(50, 1);
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expect(Math.abs(Math.round(a.distanceTo(b) / 1000) - 2084) < 5).to.eql(true);
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});
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it('does not return NaN if input points are equal', function () {
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var a = new L.LatLng(50.5, 30.5);
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var b = new L.LatLng(50.5, 30.5);
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expect(a.distanceTo(b)).to.eql(0);
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});
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});
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describe('L.latLng factory', function () {
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it('returns LatLng instance as is', function () {
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var a = new L.LatLng(50, 30);
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expect(L.latLng(a)).to.eql(a);
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});
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it('accepts an array of coordinates', function () {
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expect(L.latLng([50, 30])).to.eql(new L.LatLng(50, 30));
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});
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it('passes null or undefined as is', function () {
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expect(L.latLng(undefined)).to.eql(undefined);
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expect(L.latLng(null)).to.eql(null);
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});
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it('creates a LatLng object from two coordinates', function () {
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expect(L.latLng(50, 30)).to.eql(new L.LatLng(50, 30));
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});
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it('accepts an object with lat/lng', function () {
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expect(L.latLng({lat: 50, lng: 30})).to.eql(new L.LatLng(50, 30));
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});
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it('accepts an object with lat/lon', function () {
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expect(L.latLng({lat: 50, lon: 30})).to.eql(new L.LatLng(50, 30));
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});
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it('returns null if lng not specified', function () {
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expect(L.latLng(50)).to.be(null);
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});
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it('accepts altitude as third parameter', function () {
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expect(L.latLng(50, 30, 100)).to.eql(new L.LatLng(50, 30, 100));
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});
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it('accepts an object with alt', function () {
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expect(L.latLng({lat: 50, lng: 30, alt:100})).to.eql(new L.LatLng(50, 30, 100));
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expect(L.latLng({lat: 50, lon: 30, alt:100})).to.eql(new L.LatLng(50, 30, 100));
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});
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});
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});
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