Organize tests
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Tim Schaub
256
test/browser/spec/ol/format/topojson.test.js
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256
test/browser/spec/ol/format/topojson.test.js
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import Feature from '../../../../../src/ol/Feature.js';
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import FeatureFormat from '../../../../../src/ol/format/Feature.js';
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import MultiPolygon from '../../../../../src/ol/geom/MultiPolygon.js';
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import Polygon from '../../../../../src/ol/geom/Polygon.js';
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import TopoJSON from '../../../../../src/ol/format/TopoJSON.js';
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import {transform} from '../../../../../src/ol/proj.js';
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const aruba = {
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type: 'Topology',
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transform: {
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scale: [0.036003600360036005, 0.017361589674592462],
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translate: [-180, -89.99892578124998],
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},
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objects: {
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aruba: {
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type: 'Polygon',
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properties: {
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prop0: 'value0',
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},
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arcs: [[0]],
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id: 533,
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},
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},
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arcs: [
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[
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[3058, 5901],
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[0, -2],
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[-2, 1],
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[-1, 3],
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[-2, 3],
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[0, 3],
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[1, 1],
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[1, -3],
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[2, -5],
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[1, -1],
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],
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],
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};
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const zeroId = {
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type: 'Topology',
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objects: {
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foobar: {
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type: 'Point',
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id: 0,
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coordinates: [0, 42],
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},
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},
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};
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const nullGeometry = {
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type: 'Topology',
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objects: {
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foobar: {
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type: null,
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properties: {
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prop0: 'value0',
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},
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id: 533,
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},
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},
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};
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describe('ol.format.TopoJSON', function () {
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let format;
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before(function () {
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format = new TopoJSON();
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});
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describe('constructor', function () {
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it('creates a new format', function () {
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expect(format).to.be.a(FeatureFormat);
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expect(format).to.be.a(TopoJSON);
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});
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});
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describe('#readFeaturesFromTopology_()', function () {
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it('creates an array of features from a topology', function () {
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const features = format.readFeaturesFromObject(aruba);
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expect(features).to.have.length(1);
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const feature = features[0];
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expect(feature).to.be.a(Feature);
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const geometry = feature.getGeometry();
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expect(geometry).to.be.a(Polygon);
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// Parses identifier
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expect(feature.getId()).to.be(533);
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// Parses properties
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expect(feature.get('prop0')).to.be('value0');
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expect(geometry.getExtent()).to.eql([
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-70.08100810081008,
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12.417091709170947,
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-69.9009900990099,
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12.608069195591469,
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]);
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});
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it('can read a feature with id equal to 0', function () {
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const features = format.readFeaturesFromObject(zeroId);
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expect(features).to.have.length(1);
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const feature = features[0];
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expect(feature).to.be.a(Feature);
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expect(feature.getId()).to.be(0);
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});
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it('can read a feature with null geometry', function () {
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const features = format.readFeaturesFromObject(nullGeometry);
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expect(features).to.have.length(1);
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const feature = features[0];
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expect(feature).to.be.a(Feature);
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expect(feature.getGeometry()).to.be(null);
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expect(feature.getId()).to.be(533);
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expect(feature.get('prop0')).to.be('value0');
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});
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});
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describe('#readFeatures()', function () {
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it('parses simple.json', function (done) {
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afterLoadText('spec/ol/format/topojson/simple.json', function (text) {
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const features = format.readFeatures(text);
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expect(features.length).to.be(3);
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const point = features[0].getGeometry();
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expect(point.getType()).to.be('Point');
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expect(point.getFlatCoordinates()).to.eql([102, 0.5]);
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const line = features[1].getGeometry();
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expect(line.getType()).to.be('LineString');
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expect(line.getFlatCoordinates()).to.eql([
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102,
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0,
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103,
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1,
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104,
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0,
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105,
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1,
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]);
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const polygon = features[2].getGeometry();
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expect(polygon.getType()).to.be('Polygon');
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expect(polygon.getFlatCoordinates()).to.eql([
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100,
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0,
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100,
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1,
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101,
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1,
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101,
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0,
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100,
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0,
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]);
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done();
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});
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});
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it('parses simple.json and transforms', function (done) {
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afterLoadText('spec/ol/format/topojson/simple.json', function (text) {
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const features = format.readFeatures(text, {
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featureProjection: 'EPSG:3857',
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});
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expect(features.length).to.be(3);
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const point = features[0].getGeometry();
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expect(point.getType()).to.be('Point');
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expect(features[0].getGeometry().getCoordinates()).to.eql(
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transform([102.0, 0.5], 'EPSG:4326', 'EPSG:3857')
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);
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const line = features[1].getGeometry();
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expect(line.getType()).to.be('LineString');
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expect(line.getCoordinates()).to.eql([
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transform([102.0, 0.0], 'EPSG:4326', 'EPSG:3857'),
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transform([103.0, 1.0], 'EPSG:4326', 'EPSG:3857'),
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transform([104.0, 0.0], 'EPSG:4326', 'EPSG:3857'),
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transform([105.0, 1.0], 'EPSG:4326', 'EPSG:3857'),
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]);
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const polygon = features[2].getGeometry();
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expect(polygon.getType()).to.be('Polygon');
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expect(polygon.getCoordinates()).to.eql([
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[
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transform([100.0, 0.0], 'EPSG:4326', 'EPSG:3857'),
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transform([100.0, 1.0], 'EPSG:4326', 'EPSG:3857'),
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transform([101.0, 1.0], 'EPSG:4326', 'EPSG:3857'),
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transform([101.0, 0.0], 'EPSG:4326', 'EPSG:3857'),
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transform([100.0, 0.0], 'EPSG:4326', 'EPSG:3857'),
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],
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]);
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done();
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});
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});
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it('parses world-110m.json', function (done) {
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afterLoadText('spec/ol/format/topojson/world-110m.json', function (text) {
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const features = format.readFeatures(text);
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expect(features.length).to.be(178);
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const first = features[0];
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expect(first).to.be.a(Feature);
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const firstGeom = first.getGeometry();
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expect(firstGeom).to.be.a(MultiPolygon);
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expect(firstGeom.getExtent()).to.eql([
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-180,
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-85.60903777459777,
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180,
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83.64513000000002,
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]);
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const last = features[177];
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expect(last).to.be.a(Feature);
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const lastGeom = last.getGeometry();
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expect(lastGeom).to.be.a(Polygon);
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expect(lastGeom.getExtent()).to.eql([
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25.26325263252633,
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-22.271802279310577,
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32.848528485284874,
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-15.50833810039586,
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]);
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done();
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});
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});
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it("sets the topology's child names as feature property", function (done) {
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afterLoadText('spec/ol/format/topojson/world-110m.json', function (text) {
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const format = new TopoJSON({
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layerName: 'layer',
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});
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const features = format.readFeatures(text);
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expect(features[0].get('layer')).to.be('land');
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expect(features[177].get('layer')).to.be('countries');
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done();
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});
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});
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it("only parses features from specified topology's children", function (done) {
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afterLoadText('spec/ol/format/topojson/world-110m.json', function (text) {
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const format = new TopoJSON({
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layers: ['land'],
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});
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const features = format.readFeatures(text);
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expect(features.length).to.be(1);
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done();
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});
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});
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});
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});
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