openlayers
Version:
Build tools and sources for developing OpenLayers based mapping applications
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JavaScript
goog.provide('ol.test.reproj.Triangulation');
goog.require('ol.proj');
goog.require('ol.reproj.Triangulation');
describe('ol.reproj.Triangulation', function() {
beforeEach(function() {
proj4.defs('EPSG:27700', '+proj=tmerc +lat_0=49 +lon_0=-2 ' +
'+k=0.9996012717 +x_0=400000 +y_0=-100000 +ellps=airy ' +
'+towgs84=446.448,-125.157,542.06,0.15,0.247,0.842,-20.489 ' +
'+units=m +no_defs');
var proj27700 = ol.proj.get('EPSG:27700');
proj27700.setExtent([0, 0, 700000, 1300000]);
});
afterEach(function() {
delete proj4.defs['EPSG:27700'];
});
describe('constructor', function() {
it('is trivial for identity', function() {
var proj4326 = ol.proj.get('EPSG:4326');
var triangulation = new ol.reproj.Triangulation(proj4326, proj4326,
[20, 20, 30, 30], [-180, -90, 180, 90], 0);
expect(triangulation.getTriangles().length).to.be(2);
});
it('is empty when outside source extent', function() {
var proj4326 = ol.proj.get('EPSG:4326');
var proj27700 = ol.proj.get('EPSG:27700');
var triangulation = new ol.reproj.Triangulation(proj27700, proj4326,
[0, 0, 10, 10], proj27700.getExtent(), 0);
expect(triangulation.getTriangles().length).to.be(0);
});
it('can handle null source extent', function() {
var proj4326 = ol.proj.get('EPSG:4326');
var triangulation = new ol.reproj.Triangulation(proj4326, proj4326,
[20, 20, 30, 30], null, 0);
expect(triangulation.getTriangles().length).to.be(2);
});
});
});