Add support for the OBA REST API trips-for-route method

* See docs at http://developer.onebusaway.org/modules/onebusaway-application-modules/current/api/where/methods/trips-for-route.html
* This allows us to get active information about all current trips for a route, including status information, which includes vehicle position (towards #176)
* Also add unit test for API
* This also fixes a bug in ObaTripStatus that was preventing vehicle position from being correctly populated from the JSON response.  More unit tests have been added to check that vehicle position is being parsed correctly in both ArrivalsAndDeparturesForStop and TripsForRoute API responses.

onebusaway-android/src/androidTest/java/org/onebusaway/android/io/test/ArrivalInfoRequestTest.java

@@ -152,8 +152,9 @@ private void _assertHARTStopResponse() {
         assertEquals("Hillsborough Area Regional Transit", agency.getId());
 
         final ObaArrivalInfo[] arrivals = response.getArrivalInfo();
-        // Uhh, this will vary considerably depending on when this is run.
         assertNotNull(arrivals);
+        assertEquals(27.982215585882088, arrivals[0].getTripStatus().getPosition().getLatitude());
+        assertEquals(-82.4224, arrivals[0].getTripStatus().getPosition().getLongitude());
 
         final List<ObaStop> nearbyStops = response.getNearbyStops();
         assertTrue(nearbyStops.size() > 0);

onebusaway-android/src/androidTest/java/org/onebusaway/android/io/test/TripsForRouteRequestTest.java

@@ -0,0 +1,125 @@
+/*
+ * Copyright (C) 2015 University of South Florida (sjbarbeau@gmail.com)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onebusaway.android.io.test;
+
+import org.onebusaway.android.UriAssert;
+import org.onebusaway.android.app.Application;
+import org.onebusaway.android.io.elements.ObaRegion;
+import org.onebusaway.android.io.elements.ObaTripDetails;
+import org.onebusaway.android.io.request.ObaTripsForRouteRequest;
+import org.onebusaway.android.io.request.ObaTripsForRouteResponse;
+import org.onebusaway.android.mock.MockRegion;
+
+import java.util.HashMap;
+
+@SuppressWarnings("serial")
+public class TripsForRouteRequestTest extends ObaTestCase {
+
+    protected final String TEST_ROUTE_ID = "Hillsborough Area Regional Transit_5";
+
+    public void testHARTTripsForRouteRequest() {
+        // Test by setting API directly
+        Application.get().setCustomApiUrl("api.tampa.onebusaway.org/api");
+        callHARTTripsForRouteRequest();
+        Application.get().setCustomApiUrl(null);
+
+        // Test by setting region
+        ObaRegion tampa = MockRegion.getTampa(getContext());
+        assertNotNull(tampa);
+        Application.get().setCurrentRegion(tampa);
+        callHARTTripsForRouteRequest();
+        Application.get().setCurrentRegion(null);
+    }
+
+    private void callHARTTripsForRouteRequest() {
+        ObaTripsForRouteRequest.Builder builder = new ObaTripsForRouteRequest.Builder(getContext(),
+                TEST_ROUTE_ID);
+        ObaTripsForRouteRequest request = builder.build();
+        UriAssert.assertUriMatch(
+                "http://api.tampa.onebusaway.org/api/api/where/trips-for-route/" + TEST_ROUTE_ID
+                        + ".json",
+                new HashMap<String, String>() {{
+                    put("key", "*");
+                    put("version", "2");
+                }},
+                request
+        );
+    }
+
+    public void testHARTTripsForRouteResponse() throws Exception {
+        // Test by setting region
+        ObaRegion tampa = MockRegion.getTampa(getContext());
+        assertNotNull(tampa);
+        Application.get().setCurrentRegion(tampa);
+
+        // No trip status included
+        ObaTripsForRouteResponse response =
+                new ObaTripsForRouteRequest.Builder(getContext(), TEST_ROUTE_ID)
+                        .build()
+                        .call();
+        assertOK(response);
+        ObaTripDetails[] trips = response.getTrips();
+
+        assertEquals("Hillsborough Area Regional Transit_98682", trips[0].getId());
+        assertNull(trips[0].getStatus());
+
+        // Include vehicles status
+        response =
+                new ObaTripsForRouteRequest.Builder(getContext(), TEST_ROUTE_ID)
+                        .setIncludeStatus(true)
+                        .build()
+                        .call();
+        assertOK(response);
+        trips = response.getTrips();
+
+        assertEquals("Hillsborough Area Regional Transit_101446", trips[0].getId());
+        assertEquals("Hillsborough Area Regional Transit_2415",
+                trips[0].getStatus().getVehicleId());
+        assertEquals("Hillsborough Area Regional Transit_4707", trips[0].getStatus().getNextStop());
+        assertEquals(420, trips[0].getStatus().getScheduleDeviation());
+        assertEquals(28.063130557136404, trips[0].getStatus().getPosition().getLatitude());
+        assertEquals(-82.43457, trips[0].getStatus().getPosition().getLongitude());
+    }
+
+    public void testNewRequest() {
+        // Test by setting API directly
+        Application.get().setCustomApiUrl("api.tampa.onebusaway.org/api");
+        callNewRequest();
+        Application.get().setCustomApiUrl(null);
+
+        // Test by setting region
+        ObaRegion tampa = MockRegion.getTampa(getContext());
+        assertNotNull(tampa);
+        Application.get().setCurrentRegion(tampa);
+        callNewRequest();
+        Application.get().setCurrentRegion(null);
+    }
+
+    private void callNewRequest() {
+        // This is just to make sure we copy and call newRequest() at least once
+        ObaTripsForRouteRequest request = ObaTripsForRouteRequest
+                .newRequest(getContext(), TEST_ROUTE_ID);
+        UriAssert.assertUriMatch(
+                "http://api.tampa.onebusaway.org/api/api/where/trips-for-route/" + TEST_ROUTE_ID
+                        + ".json",
+                new HashMap<String, String>() {{
+                    put("key", "*");
+                    put("version", "2");
+                }},
+                request
+        );
+    }
+}