google-maps: Use correct type for callback argument

Fixes https://github.com/DefinitelyTyped/DefinitelyTyped/issues/11509

Also, update tests to be more realistic.

Signed-off-by: Jon West <jowest@corelogic.com>
Signed-off-by: Grant Hutchins <ghutchins@pivotal.io>

google-maps/google-maps-tests.ts

@@ -1,9 +1,19 @@
 
 
 import GoogleMapsLoader = require('google-maps');
- 
-GoogleMapsLoader.load(function(google) {
-    var loadedMap = google.maps.Map;
+
+GoogleMapsLoader.load(function (google) {
+    var uluru = {lat: -25.363, lng: 131.044};
+
+    var map = new google.maps.Map(document.getElementById('map'), {
+        zoom: 4,
+        center: uluru
+    });
+
+    var marker = new google.maps.Marker({
+        position: uluru,
+        map: map
+    });
 });
 
 GoogleMapsLoader.KEY = 'qwertyuiopasdfghjklzxcvbnm';
@@ -17,11 +27,20 @@ GoogleMapsLoader.LIBRARIES = ['geometry', 'places'];
 
 GoogleMapsLoader.LANGUAGE = 'fr';
 
-GoogleMapsLoader.release(function() {
+GoogleMapsLoader.release(function () {
     console.log('No google maps api around');
 });
 
-GoogleMapsLoader.onLoad(function(google) {
-    var loadedMap = google.maps.Map;
-    console.log('I just loaded google maps api');
+GoogleMapsLoader.onLoad(function (google) {
+    var uluru = {lat: -25.363, lng: 131.044};
+
+    var map = new google.maps.Map(document.getElementById('map'), {
+        zoom: 4,
+        center: uluru
+    });
+
+    var marker = new google.maps.Marker({
+        position: uluru,
+        map: map
+    });
 });

google-maps/index.d.ts

@@ -6,8 +6,9 @@
 /// <reference types="googlemaps" />
 
 declare namespace GoogleMapsLoader {
+    type google = { maps: typeof google.maps };
     interface CallBack {
-        (google: { maps: { Map: google.maps.Map } }): void;
+        (google: google): void;
     }
     export var KEY: string;
     export var CLIENT: string;