212 lines
7.0 KiB
JavaScript
212 lines
7.0 KiB
JavaScript
describe("CRS.EPSG3857", function () {
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var crs = L.CRS.EPSG3857;
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describe("#latLngToPoint", function () {
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it("projects a center point", function () {
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expect(crs.latLngToPoint(L.latLng(0, 0), 0)).near(new L.Point(128, 128), 0.01);
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});
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it("projects the northeast corner of the world", function () {
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expect(crs.latLngToPoint(L.latLng(85.0511287798, 180), 0)).near(new L.Point(256, 0));
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});
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});
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describe("#pointToLatLng", function () {
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it("reprojects a center point", function () {
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expect(crs.pointToLatLng(new L.Point(128, 128), 0)).nearLatLng(L.latLng(0, 0), 0.01);
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});
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it("reprojects the northeast corner of the world", function () {
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expect(crs.pointToLatLng(new L.Point(256, 0), 0)).nearLatLng(L.latLng(85.0511287798, 180));
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});
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});
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describe("project", function () {
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it('projects geo coords into meter coords correctly', function () {
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expect(crs.project(new L.LatLng(50, 30))).near(new L.Point(3339584.7238, 6446275.84102));
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expect(crs.project(new L.LatLng(85.0511287798, 180))).near(new L.Point(20037508.34279, 20037508.34278));
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expect(crs.project(new L.LatLng(-85.0511287798, -180))).near(new L.Point(-20037508.34279, -20037508.34278));
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});
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});
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describe("unproject", function () {
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it('unprojects meter coords into geo coords correctly', function () {
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expect(crs.unproject(new L.Point(3339584.7238, 6446275.84102))).nearLatLng(new L.LatLng(50, 30));
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expect(crs.unproject(new L.Point(20037508.34279, 20037508.34278))).nearLatLng(new L.LatLng(85.051129, 180));
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expect(crs.unproject(new L.Point(-20037508.34279, -20037508.34278))).nearLatLng(new L.LatLng(-85.051129, -180));
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});
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});
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describe("#getProjectedBounds", function () {
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it("gives correct size", function () {
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var i,
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worldSize = 256,
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crsSize;
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for (i = 0; i <= 22; i++) {
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crsSize = crs.getProjectedBounds(i).getSize();
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expect(crsSize.x).equal(worldSize);
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expect(crsSize.y).equal(worldSize);
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worldSize *= 2;
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}
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});
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});
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describe('#wrapLatLng', function () {
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it("wraps longitude to lie between -180 and 180 by default", function () {
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expect(crs.wrapLatLng(new L.LatLng(0, 190)).lng).to.eql(-170);
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expect(crs.wrapLatLng(new L.LatLng(0, 360)).lng).to.eql(0);
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expect(crs.wrapLatLng(new L.LatLng(0, 380)).lng).to.eql(20);
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expect(crs.wrapLatLng(new L.LatLng(0, -190)).lng).to.eql(170);
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expect(crs.wrapLatLng(new L.LatLng(0, -360)).lng).to.eql(0);
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expect(crs.wrapLatLng(new L.LatLng(0, -380)).lng).to.eql(-20);
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expect(crs.wrapLatLng(new L.LatLng(0, 90)).lng).to.eql(90);
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expect(crs.wrapLatLng(new L.LatLng(0, 180)).lng).to.eql(180);
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});
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it("does not drop altitude", function () {
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expect(crs.wrapLatLng(new L.LatLng(0, 190, 1234)).lng).to.eql(-170);
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expect(crs.wrapLatLng(new L.LatLng(0, 190, 1234)).alt).to.eql(1234);
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expect(crs.wrapLatLng(new L.LatLng(0, 380, 1234)).lng).to.eql(20);
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expect(crs.wrapLatLng(new L.LatLng(0, 380, 1234)).alt).to.eql(1234);
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});
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});
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});
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describe("CRS.EPSG4326", function () {
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var crs = L.CRS.EPSG4326;
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describe("#getSize", function () {
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it("gives correct size", function () {
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var i,
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worldSize = 256,
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crsSize;
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for (i = 0; i <= 22; i++) {
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crsSize = crs.getProjectedBounds(i).getSize();
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expect(crsSize.x).equal(worldSize * 2);
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// Lat bounds are half as high (-90/+90 compared to -180/+180)
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expect(crsSize.y).equal(worldSize);
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worldSize *= 2;
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}
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});
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});
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});
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describe("CRS.EPSG3395", function () {
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var crs = L.CRS.EPSG3395;
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describe("#latLngToPoint", function () {
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it("projects a center point", function () {
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expect(crs.latLngToPoint(L.latLng(0, 0), 0)).near(new L.Point(128, 128), 0.01);
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});
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it("projects the northeast corner of the world", function () {
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expect(crs.latLngToPoint(L.latLng(85.0840591556, 180), 0)).near(new L.Point(256, 0));
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});
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});
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describe("#pointToLatLng", function () {
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it("reprojects a center point", function () {
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expect(crs.pointToLatLng(new L.Point(128, 128), 0)).nearLatLng(L.latLng(0, 0), 0.01);
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});
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it("reprojects the northeast corner of the world", function () {
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expect(crs.pointToLatLng(new L.Point(256, 0), 0)).nearLatLng(L.latLng(85.0840591556, 180));
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});
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});
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});
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describe("CRS.Simple", function () {
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var crs = L.CRS.Simple;
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describe("#latLngToPoint", function () {
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it("converts LatLng coords to pixels", function () {
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expect(crs.latLngToPoint(L.latLng(0, 0), 0)).near(new L.Point(0, 0));
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expect(crs.latLngToPoint(L.latLng(700, 300), 0)).near(new L.Point(300, -700));
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expect(crs.latLngToPoint(L.latLng(-200, 1000), 1)).near(new L.Point(2000, 400));
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});
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});
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describe("#pointToLatLng", function () {
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it("converts pixels to LatLng coords", function () {
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expect(crs.pointToLatLng(L.point(0, 0), 0)).nearLatLng(new L.LatLng(0, 0));
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expect(crs.pointToLatLng(L.point(300, -700), 0)).nearLatLng(new L.LatLng(700, 300));
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expect(crs.pointToLatLng(L.point(2000, 400), 1)).nearLatLng(new L.LatLng(-200, 1000));
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});
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});
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describe("getProjectedBounds", function () {
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it("returns nothing", function () {
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expect(crs.getProjectedBounds(5)).to.be(null);
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});
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});
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describe("wrapLatLng", function () {
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it("returns coords as is", function () {
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expect(crs.wrapLatLng(new L.LatLng(270, 400)).equals(new L.LatLng(270, 400))).to.be(true);
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});
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it("wraps coords if configured", function () {
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var crs = L.extend({}, L.CRS.Simple, {
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wrapLng: [-200, 200],
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wrapLat: [-200, 200]
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});
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expect(crs.wrapLatLng(new L.LatLng(300, -250))).nearLatLng(new L.LatLng(-100, 150));
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});
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});
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});
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describe("CRS", function () {
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var crs = L.CRS;
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describe("#zoom && #scale", function () {
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it("convert zoom to scale and viceversa and return the same values", function () {
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var zoom = 2.5;
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var scale = crs.scale(zoom);
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expect(crs.zoom(scale)).to.eql(zoom);
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});
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});
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});
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describe("CRS.ZoomNotPowerOfTwo", function () {
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var crs = L.extend({}, L.CRS, {
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scale: function (zoom) {
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return 256 * Math.pow(1.5, zoom);
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},
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zoom: function (scale) {
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return Math.log(scale / 256) / Math.log(1.5);
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}
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});
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describe("#scale", function () {
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it("of zoom levels are related by a power of 1.5", function () {
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var zoom = 5;
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var scale = crs.scale(zoom);
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expect(crs.scale(zoom + 1)).to.eql(1.5 * scale);
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expect(crs.zoom(1.5 * scale)).to.eql(zoom + 1);
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});
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});
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describe("#zoom && #scale", function () {
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it("convert zoom to scale and viceversa and return the same values", function () {
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var zoom = 2;
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var scale = crs.scale(zoom);
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expect(crs.zoom(scale)).to.eql(zoom);
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});
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});
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});
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describe("CRS.Earth", function () {
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describe("#distance", function () {
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// Test values from http://rosettacode.org/wiki/Haversine_formula,
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// we assume using mean earth radius (https://en.wikipedia.org/wiki/Earth_radius#Mean_radius)
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// is correct, since that's what International Union of Geodesy and Geophysics recommends,
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// and that sounds serious.
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var p1 = L.latLng(36.12, -86.67);
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var p2 = L.latLng(33.94, -118.40);
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expect(L.CRS.Earth.distance(p1, p2)).to.be.within(2886444.43, 2886444.45);
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});
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});
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