init

2026-10-21 19:32:02 -04:00
commit b74d278c8e
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+var geomagnetism = require('../index.js');
+var assert = require('chai').assert;
+var fs = require('fs');
+
+var tolerances = {
+	incl: 0.01, //deg
+	decl: 0.01, //deg
+	x: 5, //nT
+	y: 5, //nT
+	z: 5, //nT
+	h: 5, //nT
+	f: 5 //nT
+};
+
+function loadTestValues(){
+	var str = fs.readFileSync(__dirname + '/values.csv', {encoding: 'utf8'});
+	var lines = str.split(/\r?\n/);
+	var header = lines[0].split(',');
+	var values = [];
+	for(var i = 1; i < lines.length; i++){
+		var l = lines[i].split(',');
+		var v = {};
+		for(var j = 0; j < header.length; j++){
+			v[header[j]] = parseFloat(l[j]);
+		}
+		values.push(v);
+	}
+	return values;
+}
+
+function getModel(test){
+	var t0, t1;
+	var year = test.date;
+	var year_int = Math.floor(year);
+	var year_fpart = year - year_int;
+	var dms = 1000*3600*24*365*year_fpart;
+
+	t0 = new Date(year_int, 0, 1);
+	t1 = new Date(t0.valueOf() + dms);
+
+	return geomagnetism.model(t1);
+}
+
+var values = loadTestValues();
+
+describe("model", function(){
+	describe("point()", function(){
+		it("should return expected values", function(){
+			values.forEach(function(test){
+				var model = getModel(test);
+				var info = model.point([test.lat, test.lon, test.alt]);
+				assert.closeTo(info.incl, test.incl, tolerances.incl, 'inclination ' + test.date);
+				assert.closeTo(info.decl, test.decl, tolerances.decl, 'declination ' + test.date);
+				assert.closeTo(info.x, test.x, tolerances.x, 'x');
+				assert.closeTo(info.y, test.y, tolerances.y, 'y');
+				assert.closeTo(info.z, test.z, tolerances.z, 'z');
+				assert.closeTo(info.h, test.h, tolerances.h, 'h');
+				assert.closeTo(info.f, test.f, tolerances.f, 'f');
+			});
+		});
+		it("should return value for current date", function(){
+			var date = new Date();
+			geomagnetism.model(date).point([44.53461, -109.05572]);
+		});
+		it("should return value for current date + 1 year", function(){
+			var date = new Date();
+			date.setFullYear(date.getFullYear() + 1);
+			geomagnetism.model(date).point([44.53461, -109.05572]);
+		});
+	});
+	describe("getTimedModel()", function(){
+		it("should throw error if date is outside of valid range and allowOutOfBoundsModel is false", function(){
+			assert.throws(function(){
+				geomagnetism.model(new Date("1/1/1999"));
+			}, Error);
+		});
+		it("should log error if date is outside of valid range below and allowOutOfBoundsModel is true", function(){
+			var model = geomagnetism.model(new Date("1/1/1999"), { allowOutOfBoundsModel: true });
+			assert.equal(model.start_date.getFullYear(), 2014);
+		});
+		it("should log error if date is outside of valid range above and allowOutOfBoundsModel is true", function(){
+			var model = geomagnetism.model(new Date("1/1/2030"), { allowOutOfBoundsModel: true });
+			assert.equal(model.start_date.getFullYear(), 2024);
+		});
+		it("should get a different model for a different date", function(){
+			var pt = [44.53461, -109.05572];
+			var model0 = geomagnetism.model();
+			var model1 = geomagnetism.model(new Date("3/22/2018"));
+			var decl0 = model0.point(pt).decl;
+			var decl1 = model1.point(pt).decl;
+			assert.notEqual(model0, model1);
+			assert(Math.abs(decl1 - decl0) > 0.001, 'declination should be different');
+		});
+
+	});
+});