fix(googlemaps): fix GoogleMapsLaLngBounds

closes #972

test/plugins/googlemap.spec.ts

@@ -0,0 +1,40 @@
+import { GoogleMapsLatLngBounds, GoogleMapsLatLng } from '../../src/plugins/googlemap';
+
+declare var window: any;
+
+class LatLngBounds {
+  public southwest: GoogleMapsLatLng;
+  public northeast: GoogleMapsLatLng;
+
+  constructor(latLngArray: GoogleMapsLatLng[]) {
+    this.southwest = latLngArray[0];
+    this.northeast = latLngArray[1];
+  }
+}
+
+window.plugin = {
+  google: {
+    maps: {
+      LatLngBounds
+    }
+  }
+};
+
+describe('GoogleMapsLatLngBounds', () => {
+
+  const southwest = new GoogleMapsLatLng(1,1);
+  const northeast = new GoogleMapsLatLng(4,4);
+  let object;
+
+  it('should create an object', () => {
+    object = new GoogleMapsLatLngBounds([southwest, northeast]);
+    expect(object).toBeDefined();
+  });
+
+  it('northwest property should be defined', () => expect(object.northeast).toBeDefined());
+
+  it('southwest property should be defined', () => expect(object.southwest).toBeDefined());
+
+
+
+});