fixes an issue where RouteOptions weren't deserialized from JSON DirectionsResponse

Author: Łukasz Paczos

services-directions-models/src/main/java/com/mapbox/api/directions/v5/models/DirectionsResponse.java

@@ -134,7 +134,11 @@ public static TypeAdapter<DirectionsResponse> typeAdapter(Gson gson) {
    * @since 3.0.0
    */
   public static DirectionsResponse fromJson(@NonNull String json) {
-    return fromJson(json, null, null);
+    GsonBuilder gson = new GsonBuilder();
+    gson.registerTypeAdapterFactory(DirectionsAdapterFactory.create());
+    gson.registerTypeAdapter(Point.class, new PointAsCoordinatesTypeAdapter());
+    // rebuilding to ensure that underlying routes have assigned indices
+    return gson.create().fromJson(json, DirectionsResponse.class).toBuilder().build();
   }
 
   /**

services-directions-models/src/test/java/com/mapbox/api/directions/v5/models/DirectionsResponseTest.java

@@ -17,6 +17,8 @@ public class DirectionsResponseTest extends TestUtils {
 
   private static final String DIRECTIONS_V5_PRECISION6_FIXTURE = "directions_v5_precision_6.json";
   private static final String DIRECTIONS_V5_MULTIPLE_ROUTES = "directions_v5_multiple_routes.json";
+  private static final String DIRECTIONS_V5_MULTIPLE_ROUTES_WITH_OPTIONS =
+    "directions_v5_multiple_routes_with_options.json";
 
   @Test
   public void sanity() throws Exception {
@@ -73,4 +75,14 @@ public void fromJson_multipleRoutesHaveCorrectIndices() throws Exception {
     assertEquals("0", routes.get(0).routeIndex());
     assertEquals("1", routes.get(1).routeIndex());
   }
+
+  @Test
+  public void fromJson_deserializesOptions() throws Exception {
+    String json = loadJsonFixture(DIRECTIONS_V5_MULTIPLE_ROUTES_WITH_OPTIONS);
+
+    List<DirectionsRoute> routes = DirectionsResponse.fromJson(json).routes();
+
+    assertNotNull(routes.get(0).routeOptions());
+    assertNotNull(routes.get(1).routeOptions());
+  }
 }