test against golang/geo/s2

tests/js-vs-go.js

@@ -0,0 +1,21 @@
+'use strict';
+
+var tests = require('./generated-locations.json');
+var jS2 = require('../src/s2geometry.js').S2;
+
+function checkReal(loc) {
+  var jCell = jS2.S2Cell.FromLatLng({ lat: loc.lat, lng: loc.lng }, 15);
+  var jQuad = jCell.getFaceAndQuads();
+  var jKey = jQuad[0] + '/' + jQuad[1].join('');
+
+  if (loc.quadkey !== jKey) {
+    console.log('');
+    console.log('Quadkey');
+    console.log('=', loc.quadkey);
+    console.log('j', jKey);
+    throw new Error("values didn't match expected");
+  }
+}
+
+tests.forEach(checkReal);
+console.log('PASS');