Format basic GPX

tests/format/Gpx.test.js

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+BR = {};
+togpx = require('togpx');
+require('../../js/format/Gpx.js');
+
+const fs = require('fs');
+
+const geoJson = require('./data/track.json');
+const path = 'tests/format/data/';
+
+// resolve intended/accepted differences before comparing
+function adoptGpx(gpx) {
+    const creator = 'togpx';
+    const name = 'Track';
+    const newline = '\n';
+
+    gpx = gpx.replace('=.0', '=0.0');
+    gpx = gpx.replace(/creator="[^"]*"/, `creator="${creator}"`);
+    gpx = gpx.replace(`creator="${creator}" version="1.1"`, `version="1.1" \n creator="${creator}"`);
+    gpx = gpx.replace(/<trk>\n  <name>[^<]*<\/name>/, `<trk>\n  <name>${name}</name>`);
+    gpx = gpx
+        .split(newline)
+        .map((line) => line.replace(/lon="([^"]*)" lat="([^"]*)"/, 'lat="$2" lon="$1"'))
+        .join(newline);
+    gpx = gpx.replace(/0"><ele>/g, '"><ele>');
+    gpx = gpx.replace('</gpx>\n', '</gpx>');
+
+    return gpx;
+}
+
+function read(fileName) {
+    return adoptGpx(fs.readFileSync(path + fileName, 'utf8'));
+}
+
+test('simple track', () => {
+    const brouterGpx = read('track.gpx');
+    const gpx = BR.Gpx.format(geoJson);
+    expect(gpx).toEqual(brouterGpx);
+});