Refactored many helpers to Typescript

test/utils/helpers/leaflet.test.js

@@ -0,0 +1,19 @@
+import L from 'leaflet';
+import marker2x from 'leaflet/dist/images/marker-icon-2x.png';
+import marker from 'leaflet/dist/images/marker-icon.png';
+import markerShadow from 'leaflet/dist/images/marker-shadow.png';
+import { fixLeafletIcons } from '../../../src/utils/helpers/leaflet';
+
+describe('leaflet', () => {
+  describe('fixLeafletIcons', () => {
+    it('updates icons used by leaflet', () => {
+      fixLeafletIcons();
+
+      const { iconRetinaUrl, iconUrl, shadowUrl } = L.Icon.Default.prototype.options;
+
+      expect(iconRetinaUrl).toEqual(marker2x);
+      expect(iconUrl).toEqual(marker);
+      expect(shadowUrl).toEqual(markerShadow);
+    });
+  });
+});