Add interceptor and event listener support for NavigationRoute (#1734)

Author: danesfeder

libandroid-navigation/src/main/java/com/mapbox/services/android/navigation/v5/navigation/NavigationRoute.java

@@ -22,6 +22,8 @@
 
 import java.util.Locale;
 
+import okhttp3.EventListener;
+import okhttp3.Interceptor;
 import retrofit2.Call;
 import retrofit2.Callback;
 import retrofit2.Response;
@@ -151,7 +153,11 @@ public static final class Builder {
      * Private constructor for initializing the raw MapboxDirections.Builder
      */
     private Builder() {
-      directionsBuilder = MapboxDirections.builder();
+      this(MapboxDirections.builder());
+    }
+
+    Builder(MapboxDirections.Builder directionsBuilder) {
+      this.directionsBuilder = directionsBuilder;
     }
 
     /**
@@ -548,6 +554,28 @@ public Builder addWaypointTargets(@Nullable Point... waypointTargets) {
       return this;
     }
 
+    /**
+     * Adds an optional interceptor to set in the OkHttp client.
+     *
+     * @param interceptor to set for OkHttp
+     * @return this builder for chaining options together
+     */
+    public Builder interceptor(Interceptor interceptor) {
+      directionsBuilder.interceptor(interceptor);
+      return this;
+    }
+
+    /**
+     * Adds an optional event listener to set in the OkHttp client.
+     *
+     * @param eventListener to set for OkHttp
+     * @return this builder for chaining options together
+     */
+    public Builder eventListener(EventListener eventListener) {
+      directionsBuilder.eventListener(eventListener);
+      return this;
+    }
+
     /**
      * Optionally create a {@link Builder} based on all variables
      * from given {@link RouteOptions}.

libandroid-navigation/src/test/java/com/mapbox/services/android/navigation/v5/navigation/NavigationRouteTest.java

@@ -24,6 +24,8 @@
 import java.util.Locale;
 
 import edu.emory.mathcs.backport.java.util.Collections;
+import okhttp3.EventListener;
+import okhttp3.Interceptor;
 import retrofit2.Call;
 import retrofit2.Callback;
 import retrofit2.Response;
@@ -226,6 +228,28 @@ public void cancelCall_doesNotCancelExecutedCall() {
     verify(routeCall, times(0)).cancel();
   }
 
+  @Test
+  public void builderInterceptor_setsMapboxDirections() {
+    MapboxDirections.Builder mapboxDirectionsBuilder = mock(MapboxDirections.Builder.class);
+    NavigationRoute.Builder builder = new NavigationRoute.Builder(mapboxDirectionsBuilder);
+    EventListener eventListener = mock(EventListener.class);
+
+    builder.eventListener(eventListener);
+
+    verify(mapboxDirectionsBuilder).eventListener(eventListener);
+  }
+
+  @Test
+  public void builderEventListener_setsMapboxDirections() {
+    MapboxDirections.Builder mapboxDirectionsBuilder = mock(MapboxDirections.Builder.class);
+    NavigationRoute.Builder builder = new NavigationRoute.Builder(mapboxDirectionsBuilder);
+    Interceptor interceptor = mock(Interceptor.class);
+
+    builder.interceptor(interceptor);
+
+    verify(mapboxDirectionsBuilder).interceptor(interceptor);
+  }
+
   @Test
   public void getRoute_routeRetrievalEventSent() {
     MapboxDirections mapboxDirections = mock(MapboxDirections.class);