145 lines
3.7 KiB
JavaScript
145 lines
3.7 KiB
JavaScript
// Copyright IBM Corp. 2014,2016. All Rights Reserved.
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// Node module: loopback-datasource-juggler
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// This file is licensed under the MIT License.
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// License text available at https://opensource.org/licenses/MIT
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/*global describe,it*/
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/*jshint expr:true */
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require('should');
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var GeoPoint = require('../lib/geo').GeoPoint;
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var DELTA = 0.0000001;
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describe('GeoPoint', function () {
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describe('constructor', function() {
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it('should support a valid array', function () {
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var point = new GeoPoint([-34, 150]);
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point.lat.should.equal(-34);
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point.lng.should.equal(150);
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});
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it('should support a valid object', function () {
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var point = new GeoPoint({ lat: -34, lng: 150 });
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point.lat.should.equal(-34);
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point.lng.should.equal(150);
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});
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it('should support valid string geo coordinates', function () {
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var point = new GeoPoint('-34,150');
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point.lat.should.equal(-34);
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point.lng.should.equal(150);
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});
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it('should support coordinates as inline parameters', function () {
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var point = new GeoPoint(-34, 150);
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point.lat.should.equal(-34);
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point.lng.should.equal(150);
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});
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it('should reject invalid parameters', function () {
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/*jshint -W024 */
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var fn = function() {
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new GeoPoint('150,-34');
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};
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fn.should.throw();
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fn = function() {
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new GeoPoint('invalid_string');
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};
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fn.should.throw();
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fn = function() {
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new GeoPoint([150, -34]);
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};
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fn.should.throw();
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fn = function() {
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new GeoPoint({
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lat: 150,
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lng: null
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});
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};
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fn.should.throw();
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fn = function() {
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new GeoPoint(150, -34);
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};
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fn.should.throw();
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fn = function() {
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new GeoPoint();
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};
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fn.should.throw();
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});
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});
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describe('toString()', function() {
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it('should return a string in the form "lat,lng"', function() {
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var point = new GeoPoint({ lat: -34, lng: 150 });
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point.toString().should.equal('-34,150');
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});
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});
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describe('distance calculation between two points', function () {
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var here = new GeoPoint({ lat: 40.77492964101182, lng: -73.90950187151662 });
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var there = new GeoPoint({ lat: 40.7753227, lng: -73.909217 });
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it('should return value in miles by default', function () {
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var distance = GeoPoint.distanceBetween(here, there);
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distance.should.be.a.Number;
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distance.should.be.approximately(0.03097916611592679, DELTA);
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});
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it('should return value using specified unit', function () {
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/* Supported units:
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* - `radians`
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* - `kilometers`
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* - `meters`
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* - `miles`
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* - `feet`
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* - `degrees`
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*/
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var distance = here.distanceTo(there, { type: 'radians'});
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distance.should.be.a.Number;
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distance.should.be.approximately(0.000007825491914348416, DELTA);
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distance = here.distanceTo(there, { type: 'kilometers'});
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distance.should.be.a.Number;
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distance.should.be.approximately(0.04985613511367009, DELTA);
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distance = here.distanceTo(there, { type: 'meters'});
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distance.should.be.a.Number;
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distance.should.be.approximately(49.856135113670085, DELTA);
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distance = here.distanceTo(there, { type: 'miles'});
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distance.should.be.a.Number;
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distance.should.be.approximately(0.03097916611592679, DELTA);
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distance = here.distanceTo(there, { type: 'feet'});
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distance.should.be.a.Number;
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distance.should.be.approximately(163.56999709209347, DELTA);
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distance = here.distanceTo(there, { type: 'degrees'});
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distance.should.be.a.Number;
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distance.should.be.approximately(0.0004483676593058972, DELTA);
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});
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});
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});
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