Test snap with geographic coordinates

test/spec/util.js

@@ -0,0 +1,17 @@
+
+export function overrideRAF() {
+  const raf = window.requestAnimationFrame;
+  const caf = window.cancelAnimationFrame;
+
+  window.requestAnimationFrame = function(callback) {
+    return setTimeout(callback, 1);
+  };
+  window.cancelAnimationFrame = function(key) {
+    return clearTimeout(key);
+  };
+
+  return function() {
+    window.requestAnimationFrame = raf;
+    window.cancelAnimationFrame = caf;
+  };
+}