openlayers
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Build tools and sources for developing OpenLayers based mapping applications
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JavaScript
goog.provide('ol.test.reader.GeoJSON');
goog.require('ol.Feature');
goog.require('ol.extent');
goog.require('ol.format.GeoJSON');
goog.require('ol.geom.Circle');
goog.require('ol.geom.GeometryCollection');
goog.require('ol.geom.LineString');
goog.require('ol.geom.LinearRing');
goog.require('ol.geom.MultiPolygon');
goog.require('ol.geom.Point');
goog.require('ol.geom.Polygon');
goog.require('ol.proj');
describe('ol.format.GeoJSON', function() {
var format;
beforeEach(function() {
format = new ol.format.GeoJSON();
});
var pointGeoJSON = {
'type': 'Feature',
'geometry': {
'type': 'Point',
'coordinates': [102.0, 0.5]
},
'properties': {
'prop0': 'value0'
}
};
var nullGeometryGeoJSON = {
'type': 'Feature',
'geometry': null,
'properties': {
'prop0': 'value0'
}
};
var zeroIdGeoJSON = {
'type': 'Feature',
'id': 0,
'geometry': null,
'properties': {
'prop0': 'value0'
}
};
var lineStringGeoJSON = {
'type': 'Feature',
'geometry': {
'type': 'LineString',
'coordinates': [
[102.0, 0.0], [103.0, 1.0], [104.0, 0.0], [105.0, 1.0]
]
},
'properties': {
'prop0': 'value0',
'prop1': 0.0
}
};
var polygonGeoJSON = {
'type': 'Feature',
'geometry': {
'type': 'Polygon',
'coordinates': [[
[100.0, 0.0], [100.0, 1.0], [101.0, 1.0], [101.0, 0.0]
]]
},
'properties': {
'prop0': 'value0',
'prop1': {'this': 'that'}
}
};
var featureCollectionGeoJSON = {
'type': 'FeatureCollection',
'features': [pointGeoJSON, lineStringGeoJSON, polygonGeoJSON]
};
var data = {
'type': 'FeatureCollection',
'features': [{
'type': 'Feature',
'properties': {
'LINK_ID': 573730499,
'RP_TYPE': 14,
'RP_FUNC': 0,
'DIRECTION': 2,
'LOGKOD': '',
'CHANGED': '',
'USERID': '',
'ST_NAME': '',
'L_REFADDR': '',
'L_NREFADDR': '',
'R_REFADDR': '',
'R_NREFADDR': '',
'SPEED_CAT': '7',
'ZIPCODE': '59330',
'SHAPE_LEN': 46.3826
},
'geometry': {
'type': 'LineString',
'coordinates': [
[1549497.66985, 6403707.96],
[1549491.1, 6403710.1],
[1549488.03995, 6403716.7504],
[1549488.5401, 6403724.5504],
[1549494.37985, 6403733.54],
[1549499.6799, 6403738.0504],
[1549506.22, 6403739.2504]
]
}
}, {
'type': 'Feature',
'properties': {
'LINK_ID': 30760556,
'RP_TYPE': 12,
'RP_FUNC': 1,
'DIRECTION': 0,
'LOGKOD': '',
'CHANGED': '',
'USERID': '',
'ST_NAME': 'BRUNNSGATAN',
'L_REFADDR': '24',
'L_NREFADDR': '16',
'R_REFADDR': '',
'R_NREFADDR': '',
'SPEED_CAT': '7',
'ZIPCODE': '59330',
'SHAPE_LEN': 70.3106
},
'geometry': {
'type': 'LineString',
'coordinates': [
[1549754.2769, 6403854.8024],
[1549728.45985, 6403920.2]
]
}
}]
};
describe('#readFeature', function() {
it('can read a single point feature', function() {
var feature = format.readFeature(pointGeoJSON);
expect(feature).to.be.an(ol.Feature);
var geometry = feature.getGeometry();
expect(geometry).to.be.an(ol.geom.Point);
expect(geometry.getCoordinates()).to.eql([102.0, 0.5]);
expect(feature.get('prop0')).to.be('value0');
});
it('can read a single point geometry as a feature', function() {
var feature = format.readFeature(pointGeoJSON.geometry);
expect(feature).to.be.an(ol.Feature);
var geometry = feature.getGeometry();
expect(geometry).to.be.an(ol.geom.Point);
expect(geometry.getCoordinates()).to.eql([102.0, 0.5]);
});
it('can read a single line string feature', function() {
var feature = format.readFeature(lineStringGeoJSON);
expect(feature).to.be.an(ol.Feature);
var geometry = feature.getGeometry();
expect(geometry).to.be.an(ol.geom.LineString);
expect(geometry.getCoordinates()).to.eql(
[[102.0, 0.0], [103.0, 1.0], [104.0, 0.0], [105.0, 1.0]]);
expect(feature.get('prop0')).to.be('value0');
expect(feature.get('prop1')).to.be(0.0);
});
it('can read a single polygon feature', function() {
var feature = format.readFeature(polygonGeoJSON);
expect(feature).to.be.an(ol.Feature);
var geometry = feature.getGeometry();
expect(geometry).to.be.an(ol.geom.Polygon);
expect(geometry.getCoordinates()).to.eql([[
[100.0, 0.0], [100.0, 1.0], [101.0, 1.0], [101.0, 0.0]
]]);
expect(feature.get('prop0')).to.be('value0');
expect(feature.get('prop1')).to.eql({'this': 'that'});
});
it('can read a feature with null geometry', function() {
var feature = format.readFeature(nullGeometryGeoJSON);
expect(feature).to.be.an(ol.Feature);
var geometry = feature.getGeometry();
expect(geometry).to.eql(null);
expect(feature.get('prop0')).to.be('value0');
});
it('can read a feature with id equal to 0', function() {
var feature = format.readFeature(zeroIdGeoJSON);
expect(feature).to.be.an(ol.Feature);
expect(feature.getId()).to.be(0);
});
it('can read a feature collection', function() {
var features = format.readFeatures(featureCollectionGeoJSON);
expect(features).to.have.length(3);
expect(features[0].getGeometry()).to.be.an(ol.geom.Point);
expect(features[1].getGeometry()).to.be.an(ol.geom.LineString);
expect(features[2].getGeometry()).to.be.an(ol.geom.Polygon);
});
it('can read and transform a point', function() {
var feature = format.readFeatures(pointGeoJSON, {
featureProjection: 'EPSG:3857'
});
expect(feature[0].getGeometry()).to.be.an(ol.geom.Point);
expect(feature[0].getGeometry().getCoordinates()).to.eql(
ol.proj.transform([102.0, 0.5], 'EPSG:4326', 'EPSG:3857'));
});
it('uses featureProjection passed to the constructor', function() {
var format = new ol.format.GeoJSON({featureProjection: 'EPSG:3857'});
var feature = format.readFeatures(pointGeoJSON);
expect(feature[0].getGeometry()).to.be.an(ol.geom.Point);
expect(feature[0].getGeometry().getCoordinates()).to.eql(
ol.proj.transform([102.0, 0.5], 'EPSG:4326', 'EPSG:3857'));
});
it('gives precedence to options passed to the read method', function() {
var format = new ol.format.GeoJSON({featureProjection: 'EPSG:1234'});
var feature = format.readFeatures(pointGeoJSON, {
featureProjection: 'EPSG:3857'
});
expect(feature[0].getGeometry()).to.be.an(ol.geom.Point);
expect(feature[0].getGeometry().getCoordinates()).to.eql(
ol.proj.transform([102.0, 0.5], 'EPSG:4326', 'EPSG:3857'));
});
it('can read and transform a feature collection', function() {
var features = format.readFeatures(featureCollectionGeoJSON, {
featureProjection: 'EPSG:3857'
});
expect(features[0].getGeometry()).to.be.an(ol.geom.Point);
expect(features[0].getGeometry().getCoordinates()).to.eql(
ol.proj.transform([102.0, 0.5], 'EPSG:4326', 'EPSG:3857'));
expect(features[1].getGeometry().getCoordinates()).to.eql([
ol.proj.transform([102.0, 0.0], 'EPSG:4326', 'EPSG:3857'),
ol.proj.transform([103.0, 1.0], 'EPSG:4326', 'EPSG:3857'),
ol.proj.transform([104.0, 0.0], 'EPSG:4326', 'EPSG:3857'),
ol.proj.transform([105.0, 1.0], 'EPSG:4326', 'EPSG:3857')
]);
expect(features[2].getGeometry().getCoordinates()).to.eql([[
ol.proj.transform([100.0, 0.0], 'EPSG:4326', 'EPSG:3857'),
ol.proj.transform([100.0, 1.0], 'EPSG:4326', 'EPSG:3857'),
ol.proj.transform([101.0, 1.0], 'EPSG:4326', 'EPSG:3857'),
ol.proj.transform([101.0, 0.0], 'EPSG:4326', 'EPSG:3857')
]]);
});
it('can create a feature with a specific geometryName', function() {
var feature = new ol.format.GeoJSON({geometryName: 'the_geom'}).
readFeature(pointGeoJSON);
expect(feature.getGeometryName()).to.be('the_geom');
expect(feature.getGeometry()).to.be.an(ol.geom.Point);
});
});
describe('#readFeatures', function() {
it('parses feature collection', function() {
var str = JSON.stringify(data);
var array = format.readFeatures(str);
expect(array.length).to.be(2);
var first = array[0];
expect(first).to.be.a(ol.Feature);
expect(first.get('LINK_ID')).to.be(573730499);
var firstGeom = first.getGeometry();
expect(firstGeom).to.be.a(ol.geom.LineString);
var second = array[1];
expect(second).to.be.a(ol.Feature);
expect(second.get('ST_NAME')).to.be('BRUNNSGATAN');
var secondGeom = second.getGeometry();
expect(secondGeom).to.be.a(ol.geom.LineString);
});
it('can parse a polygon geometry as an array of one feature', function() {
var features = format.readFeatures(polygonGeoJSON);
expect(features).to.be.an(Array);
expect(features).to.have.length(1);
var geometry = features[0].getGeometry();
expect(geometry).to.be.an(ol.geom.Polygon);
});
it('parses countries.geojson', function(done) {
afterLoadText('spec/ol/format/geojson/countries.geojson', function(text) {
var result = format.readFeatures(text);
expect(result.length).to.be(179);
var first = result[0];
expect(first).to.be.a(ol.Feature);
expect(first.get('name')).to.be('Afghanistan');
expect(first.getId()).to.be('AFG');
var firstGeom = first.getGeometry();
expect(firstGeom).to.be.a(ol.geom.Polygon);
expect(ol.extent.equals(firstGeom.getExtent(),
[60.52843, 29.318572, 75.158028, 38.486282]))
.to.be(true);
var last = result[178];
expect(last).to.be.a(ol.Feature);
expect(last.get('name')).to.be('Zimbabwe');
expect(last.getId()).to.be('ZWE');
var lastGeom = last.getGeometry();
expect(lastGeom).to.be.a(ol.geom.Polygon);
expect(ol.extent.equals(lastGeom.getExtent(),
[25.264226, -22.271612, 32.849861, -15.507787]))
.to.be(true);
done();
});
});
it('generates an array of features for Feature', function() {
var format = new ol.format.GeoJSON();
var json = {
type: 'Feature',
properties: {
bam: 'baz'
},
geometry: {
type: 'LineString',
coordinates: [[1, 2], [3, 4]]
}
};
var features = format.readFeatures(json);
expect(features.length).to.be(1);
var first = features[0];
expect(first).to.be.a(ol.Feature);
expect(first.get('bam')).to.be('baz');
expect(first.getGeometry()).to.be.a(ol.geom.LineString);
expect(format.readProjection(json)).to.be(ol.proj.get('EPSG:4326'));
});
});
describe('#readGeometry', function() {
it('parses point', function() {
var str = JSON.stringify({
type: 'Point',
coordinates: [10, 20]
});
var obj = format.readGeometry(str);
expect(obj).to.be.a(ol.geom.Point);
expect(obj.getCoordinates()).to.eql([10, 20]);
expect(obj.getLayout()).to.eql('XY');
});
it('parses linestring', function() {
var str = JSON.stringify({
type: 'LineString',
coordinates: [[10, 20], [30, 40]]
});
var obj = format.readGeometry(str);
expect(obj).to.be.a(ol.geom.LineString);
expect(obj.getCoordinates()).to.eql([[10, 20], [30, 40]]);
expect(obj.getLayout()).to.eql('XY');
});
it('parses XYZ linestring', function() {
var str = JSON.stringify({
type: 'LineString',
coordinates: [[10, 20, 1534], [30, 40, 1420]]
});
var obj = format.readGeometry(str);
expect(obj).to.be.a(ol.geom.LineString);
expect(obj.getLayout()).to.eql('XYZ');
expect(obj.getCoordinates()).to.eql([[10, 20, 1534], [30, 40, 1420]]);
});
it('parses polygon', function() {
var outer = [[0, 0], [10, 0], [10, 10], [0, 10], [0, 0]];
var inner1 = [[1, 1], [2, 1], [2, 2], [1, 2], [1, 1]];
var inner2 = [[8, 8], [9, 8], [9, 9], [8, 9], [8, 8]];
var str = JSON.stringify({
type: 'Polygon',
coordinates: [outer, inner1, inner2]
});
var obj = format.readGeometry(str);
expect(obj).to.be.a(ol.geom.Polygon);
expect(obj.getLayout()).to.eql('XY');
var rings = obj.getLinearRings();
expect(rings.length).to.be(3);
expect(rings[0]).to.be.a(ol.geom.LinearRing);
expect(rings[1]).to.be.a(ol.geom.LinearRing);
expect(rings[2]).to.be.a(ol.geom.LinearRing);
});
it('parses geometry collection', function() {
var str = JSON.stringify({
type: 'GeometryCollection',
geometries: [
{type: 'Point', coordinates: [10, 20]},
{type: 'LineString', coordinates: [[30, 40], [50, 60]]}
]
});
var geometryCollection = format.readGeometry(str);
expect(geometryCollection).to.be.an(ol.geom.GeometryCollection);
var array = geometryCollection.getGeometries();
expect(array.length).to.be(2);
expect(array[0]).to.be.a(ol.geom.Point);
expect(array[0].getLayout()).to.eql('XY');
expect(array[1]).to.be.a(ol.geom.LineString);
expect(array[1].getLayout()).to.eql('XY');
});
});
describe('#readProjection', function() {
it('reads named crs from top-level object', function() {
var json = {
type: 'FeatureCollection',
crs: {
type: 'name',
properties: {
name: 'EPSG:3857'
}
},
features: [{
type: 'Feature',
properties: {
foo: 'bar'
},
geometry: {
type: 'Point',
coordinates: [1, 2]
}
}, {
type: 'Feature',
properties: {
bam: 'baz'
},
geometry: {
type: 'LineString',
coordinates: [[1, 2], [3, 4]]
}
}]
};
var features = format.readFeatures(json);
expect(features.length).to.be(2);
var first = features[0];
expect(first).to.be.a(ol.Feature);
expect(first.get('foo')).to.be('bar');
expect(first.getGeometry()).to.be.a(ol.geom.Point);
var second = features[1];
expect(second).to.be.a(ol.Feature);
expect(second.get('bam')).to.be('baz');
expect(second.getGeometry()).to.be.a(ol.geom.LineString);
expect(format.readProjection(json)).to.be(ol.proj.get('EPSG:3857'));
});
it('accepts null crs', function() {
var json = {
type: 'FeatureCollection',
crs: null,
features: [{
type: 'Feature',
properties: {
foo: 'bar'
},
geometry: {
type: 'Point',
coordinates: [1, 2]
}
}, {
type: 'Feature',
properties: {
bam: 'baz'
},
geometry: {
type: 'LineString',
coordinates: [[1, 2], [3, 4]]
}
}]
};
var features = format.readFeatures(json);
expect(features.length).to.be(2);
var first = features[0];
expect(first).to.be.a(ol.Feature);
expect(first.get('foo')).to.be('bar');
expect(first.getGeometry()).to.be.a(ol.geom.Point);
var second = features[1];
expect(second).to.be.a(ol.Feature);
expect(second.get('bam')).to.be('baz');
expect(second.getGeometry()).to.be.a(ol.geom.LineString);
expect(format.readProjection(json)).to.be(ol.proj.get('EPSG:4326'));
});
it('can read out-of-specification CRS generated by GeoServer', function() {
// TODO: remove this when http://jira.codehaus.org/browse/GEOS-5996
// is fixed and widely deployed.
var json = {
crs: {
type: 'EPSG',
properties: {
code: '4326'
}
}
};
expect(format.readProjection(json)).to.be(ol.proj.get('EPSG:4326'));
});
});
describe('#writeFeatures', function() {
it('encodes feature collection', function() {
var str = JSON.stringify(data);
var array = format.readFeatures(str);
var geojson = format.writeFeaturesObject(array);
var result = format.readFeatures(geojson);
expect(array.length).to.equal(result.length);
var got, exp, gotProp, expProp;
for (var i = 0, ii = array.length; i < ii; ++i) {
got = array[i];
exp = result[i];
expect(got.getGeometry().getCoordinates()).to.eql(
exp.getGeometry().getCoordinates());
gotProp = got.getProperties();
delete gotProp.geometry;
expProp = exp.getProperties();
delete expProp.geometry;
expect(gotProp).to.eql(expProp);
}
});
it('transforms and encodes feature collection', function() {
var str = JSON.stringify(data);
var array = format.readFeatures(str);
var geojson = format.writeFeatures(array, {
featureProjection: 'EPSG:3857'
});
var result = format.readFeatures(geojson);
var got, exp;
for (var i = 0, ii = array.length; i < ii; ++i) {
got = array[i];
exp = result[i];
expect(got.getGeometry().transform('EPSG:3857', 'EPSG:4326')
.getCoordinates()).to.eql(exp.getGeometry().getCoordinates());
}
});
it('writes out a feature with a different geometryName correctly',
function() {
var feature = new ol.Feature({'foo': 'bar'});
feature.setGeometryName('mygeom');
feature.setGeometry(new ol.geom.Point([5, 10]));
var geojson = format.writeFeaturesObject([feature]);
expect(geojson.features[0].properties.mygeom).to.eql(undefined);
});
it('writes out a feature without properties correctly', function() {
var feature = new ol.Feature(new ol.geom.Point([5, 10]));
var geojson = format.writeFeatureObject(feature);
expect(geojson.properties).to.eql(null);
});
it('writes out a feature without geometry correctly', function() {
var feature = new ol.Feature();
var geojson = format.writeFeatureObject(feature);
expect(geojson.geometry).to.eql(null);
});
it('writes out a feature with id equal to 0 correctly', function() {
var feature = new ol.Feature();
feature.setId(0);
var geojson = format.writeFeatureObject(feature);
expect(geojson.id).to.eql(0);
});
});
describe('#writeGeometry', function() {
it('encodes point', function() {
var point = new ol.geom.Point([10, 20]);
var geojson = format.writeGeometry(point);
expect(point.getCoordinates()).to.eql(
format.readGeometry(geojson).getCoordinates());
});
it('accepts featureProjection', function() {
var point = new ol.geom.Point(ol.proj.fromLonLat([10, 20]));
var geojson = format.writeGeometry(point, {featureProjection: 'EPSG:3857'});
var obj = JSON.parse(geojson);
expect(obj.coordinates).to.eql(ol.proj.toLonLat(point.getCoordinates()));
});
it('respects featureProjection passed to constructor', function() {
var format = new ol.format.GeoJSON({featureProjection: 'EPSG:3857'});
var point = new ol.geom.Point(ol.proj.fromLonLat([10, 20]));
var geojson = format.writeGeometry(point);
var obj = JSON.parse(geojson);
expect(obj.coordinates).to.eql(ol.proj.toLonLat(point.getCoordinates()));
});
it('encodes linestring', function() {
var linestring = new ol.geom.LineString([[10, 20], [30, 40]]);
var geojson = format.writeGeometry(linestring);
expect(linestring.getCoordinates()).to.eql(
format.readGeometry(geojson).getCoordinates());
});
it('encodes polygon', function() {
var outer = [[0, 0], [10, 0], [10, 10], [0, 10], [0, 0]];
var inner1 = [[1, 1], [2, 1], [2, 2], [1, 2], [1, 1]];
var inner2 = [[8, 8], [9, 8], [9, 9], [8, 9], [8, 8]];
var polygon = new ol.geom.Polygon([outer, inner1, inner2]);
var geojson = format.writeGeometry(polygon);
expect(polygon.getCoordinates()).to.eql(
format.readGeometry(geojson).getCoordinates());
});
it('maintains coordinate order by default', function() {
var cw = [[-180, -90], [-180, 90], [180, 90], [180, -90], [-180, -90]];
var ccw = [[-180, -90], [180, -90], [180, 90], [-180, 90], [-180, -90]];
var right = new ol.geom.Polygon([ccw, cw]);
var rightMulti = new ol.geom.MultiPolygon([[ccw, cw]]);
var left = new ol.geom.Polygon([cw, ccw]);
var leftMulti = new ol.geom.MultiPolygon([[cw, ccw]]);
var rightObj = {
type: 'Polygon',
coordinates: [ccw, cw]
};
var rightMultiObj = {
type: 'MultiPolygon',
coordinates: [[ccw, cw]]
};
var leftObj = {
type: 'Polygon',
coordinates: [cw, ccw]
};
var leftMultiObj = {
type: 'MultiPolygon',
coordinates: [[cw, ccw]]
};
expect(JSON.parse(format.writeGeometry(right))).to.eql(rightObj);
expect(
JSON.parse(format.writeGeometry(rightMulti))).to.eql(rightMultiObj);
expect(JSON.parse(format.writeGeometry(left))).to.eql(leftObj);
expect(JSON.parse(format.writeGeometry(leftMulti))).to.eql(leftMultiObj);
});
it('allows serializing following the right-hand rule', function() {
var cw = [[-180, -90], [-180, 90], [180, 90], [180, -90], [-180, -90]];
var ccw = [[-180, -90], [180, -90], [180, 90], [-180, 90], [-180, -90]];
var right = new ol.geom.Polygon([ccw, cw]);
var rightMulti = new ol.geom.MultiPolygon([[ccw, cw]]);
var left = new ol.geom.Polygon([cw, ccw]);
var leftMulti = new ol.geom.MultiPolygon([[cw, ccw]]);
var rightObj = {
type: 'Polygon',
coordinates: [ccw, cw]
};
var rightMultiObj = {
type: 'MultiPolygon',
coordinates: [[ccw, cw]]
};
var json = format.writeGeometry(right, {rightHanded: true});
expect(JSON.parse(json)).to.eql(rightObj);
json = format.writeGeometry(rightMulti, {rightHanded: true});
expect(JSON.parse(json)).to.eql(rightMultiObj);
json = format.writeGeometry(left, {rightHanded: true});
expect(JSON.parse(json)).to.eql(rightObj);
json = format.writeGeometry(leftMulti, {rightHanded: true});
expect(JSON.parse(json)).to.eql(rightMultiObj);
});
it('allows serializing following the left-hand rule', function() {
var cw = [[-180, -90], [-180, 90], [180, 90], [180, -90], [-180, -90]];
var ccw = [[-180, -90], [180, -90], [180, 90], [-180, 90], [-180, -90]];
var right = new ol.geom.Polygon([ccw, cw]);
var rightMulti = new ol.geom.MultiPolygon([[ccw, cw]]);
var left = new ol.geom.Polygon([cw, ccw]);
var leftMulti = new ol.geom.MultiPolygon([[cw, ccw]]);
var leftObj = {
type: 'Polygon',
coordinates: [cw, ccw]
};
var leftMultiObj = {
type: 'MultiPolygon',
coordinates: [[cw, ccw]]
};
var json = format.writeGeometry(right, {rightHanded: false});
expect(JSON.parse(json)).to.eql(leftObj);
json = format.writeGeometry(rightMulti, {rightHanded: false});
expect(JSON.parse(json)).to.eql(leftMultiObj);
json = format.writeGeometry(left, {rightHanded: false});
expect(JSON.parse(json)).to.eql(leftObj);
json = format.writeGeometry(leftMulti, {rightHanded: false});
expect(JSON.parse(json)).to.eql(leftMultiObj);
});
it('encodes geometry collection', function() {
var collection = new ol.geom.GeometryCollection([
new ol.geom.Point([10, 20]),
new ol.geom.LineString([[30, 40], [50, 60]])
]);
var geojson = format.writeGeometry(collection);
var got = format.readGeometry(geojson);
expect(got).to.be.an(ol.geom.GeometryCollection);
var gotGeometries = got.getGeometries();
var geometries = collection.getGeometries();
expect(geometries.length).to.equal(gotGeometries.length);
for (var i = 0, ii = geometries.length; i < ii; ++i) {
expect(geometries[i].getCoordinates()).
to.eql(gotGeometries[i].getCoordinates());
}
});
it('encodes a circle as an empty geometry collection', function() {
var circle = new ol.geom.Circle([0, 0], 1);
var geojson = format.writeGeometryObject(circle);
expect(geojson).to.eql({
'type': 'GeometryCollection',
'geometries': []
});
});
it('transforms and encodes a point', function() {
var point = new ol.geom.Point([2, 3]);
var geojson = format.writeGeometry(point, {
featureProjection: 'EPSG:3857'
});
var newPoint = format.readGeometry(geojson, {
featureProjection: 'EPSG:3857'
});
expect(point.getCoordinates()[0]).to.roughlyEqual(
newPoint.getCoordinates()[0], 1e-8);
expect(point.getCoordinates()[1]).to.roughlyEqual(
newPoint.getCoordinates()[1], 1e-8);
});
it('transforms and encodes geometry collection', function() {
var collection = new ol.geom.GeometryCollection([
new ol.geom.Point([2, 3]),
new ol.geom.LineString([[3, 2], [2, 1]])
]);
var geojson = format.writeGeometry(collection, {
featureProjection: 'EPSG:3857'
});
var got = format.readGeometry(geojson, {
featureProjection: 'EPSG:3857'
});
var gotGeometries = got.getGeometries();
var geometries = collection.getGeometries();
expect(geometries[0].getCoordinates()[0]).to.roughlyEqual(
gotGeometries[0].getCoordinates()[0], 1e-8);
expect(geometries[0].getCoordinates()[1]).to.roughlyEqual(
gotGeometries[0].getCoordinates()[1], 1e-8);
expect(geometries[1].getCoordinates()[0][0]).to.roughlyEqual(
gotGeometries[1].getCoordinates()[0][0], 1e-8);
expect(geometries[1].getCoordinates()[0][1]).to.roughlyEqual(
gotGeometries[1].getCoordinates()[0][1], 1e-8);
});
it('truncates transformed point with decimals option', function() {
var point = new ol.geom.Point([2, 3]).transform('EPSG:4326','EPSG:3857');
var geojson = format.writeGeometry(point, {
featureProjection: 'EPSG:3857',
decimals: 2
});
expect(format.readGeometry(geojson).getCoordinates()).to.eql(
[2, 3]);
});
it('truncates a linestring with decimals option', function() {
var linestring = new ol.geom.LineString([[42.123456789, 38.987654321],
[43, 39]]);
var geojson = format.writeGeometry(linestring, {
decimals: 6
});
expect(format.readGeometry(geojson).getCoordinates()).to.eql(
[[42.123457, 38.987654], [43, 39]]);
});
});
});