GeoData Listener Tests

src/main/java/com/firebase/geofire/GeoQueryDataEventListener.java

@@ -67,9 +67,14 @@ public interface GeoQueryDataEventListener {
 
     /**
      * Called if a dataSnapshot changed within the search area.
-     * An onDataMoved() event would always be preceded by onDataChanged() but it would be possible to see onDataChanged() without an antecedent onDataMoved().
      *
-     * This method can be called multiple times.
+     * An onDataMoved() is always followed by onDataChanged() but it is be possible to see
+     * onDataChanged() without an preceding onDataMoved().
+     *
+     * This method can be called multiple times for a single location change, due to the way
+     * the Realtime Database handles floating point numbers.
+     *
+     * Note: this method is not related to ValueEventListener#onDataChange(DataSnapshot).
      *
      * @param dataSnapshot The associated dataSnapshot that moved within the search area
      * @param location The location for this dataSnapshot as a GeoLocation object

src/test/java/com/firebase/geofire/GeoQueryDataEventTestListener.java

@@ -0,0 +1,80 @@
+package com.firebase.geofire;
+
+import static java.util.Locale.US;
+
+import com.google.firebase.database.DatabaseError;
+import com.google.firebase.database.DataSnapshot;
+
+public class GeoQueryDataEventTestListener extends TestListener implements GeoQueryDataEventListener {
+
+  private boolean recordEntered;
+  private boolean recordMoved;
+  private boolean recordChanged;
+  private boolean recordExited;
+
+  public static String dataEntered(String key, double latitude, double longitude) {
+    return String.format(US, "DATA_ENTERED(%s,%f,%f)", key, latitude, longitude);
+  }
+
+  public static String dataExited(String key) {
+    return String.format("DATA_EXITED(%s)", key);
+  }
+
+  public static String dataMoved(String key, double latitude, double longitude) {
+    return String.format(US, "DATA_MOVED(%s,%f,%f)", key, latitude, longitude);
+  }
+
+  public static String dataChanged(String key, double latitude, double longitude) {
+    return String.format(US, "DATA_CHANGED(%s,%f,%f)", key, latitude, longitude);
+  }
+
+  public GeoQueryDataEventTestListener(boolean recordEntered,
+                                       boolean recordMoved,
+                                       boolean recordChanged,
+                                       boolean recordExited) {
+    this.recordEntered = recordEntered;
+    this.recordMoved = recordMoved;
+    this.recordChanged = recordChanged;
+    this.recordExited = recordExited;
+
+  }
+
+  @Override
+  public void onDataEntered(DataSnapshot dataSnapshot, GeoLocation location) {
+    if (recordEntered) {
+      this.addEvent(dataEntered(dataSnapshot.getKey(), location.latitude, location.longitude));
+    }
+  }
+
+  @Override
+  public void onDataExited(DataSnapshot dataSnapshot) {
+    if (recordExited) {
+      this.addEvent(dataExited(dataSnapshot.getKey()));
+    }
+  }
+
+  @Override
+  public void onDataMoved(DataSnapshot dataSnapshot, GeoLocation location) {
+    if (recordMoved) {
+      this.addEvent(dataMoved(dataSnapshot.getKey(), location.latitude, location.longitude));
+    }
+  }
+
+  @Override
+  public void onDataChanged(DataSnapshot dataSnapshot, GeoLocation location) {
+    if (recordChanged) {
+      this.addEvent(dataChanged(dataSnapshot.getKey(), location.latitude, location.longitude));
+    }
+  }
+
+  @Override
+  public void onGeoQueryReady() {
+
+  }
+
+  @Override
+  public void onGeoQueryError(DatabaseError error) {
+
+  }
+
+}

src/test/java/com/firebase/geofire/GeoQueryTest.java

@@ -1,6 +1,7 @@
 package com.firebase.geofire;
 
 import com.google.firebase.database.DatabaseError;
+import com.google.firebase.database.DatabaseReference;
 import junit.framework.Assert;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -109,6 +110,43 @@ public void keyMoved() throws InterruptedException {
         testListener.expectEvents(events);
     }
 
+    @Test
+    public void dataChanged() throws InterruptedException {
+        GeoFire geoFire = newTestGeoFire();
+        setLoc(geoFire, "0", 0, 0);
+        setLoc(geoFire, "1", 37.0000, -122.0001);
+        setLoc(geoFire, "2", 37.0001, -122.0001);
+        setLoc(geoFire, "3", 37.1000, -122.0000);
+        setLoc(geoFire, "4", 37.0002, -121.9998, true);
+
+        GeoQuery query = geoFire.queryAtLocation(new GeoLocation(37, -122), 0.5);
+
+        GeoQueryDataEventTestListener testListener = new GeoQueryDataEventTestListener(
+            false, true, true, false);
+        query.addGeoQueryDataEventListener(testListener);
+
+        waitForGeoFireReady(geoFire);
+
+        setLoc(geoFire, "0", 1, 1, true); // outside of query
+        setLoc(geoFire, "1", 37.0001, -122.0001, true); // moved
+        setLoc(geoFire, "2", 37.0001, -122.0001, true); // location stayed the same
+        setLoc(geoFire, "4", 37.0002, -121.9999, true); // moved
+
+        DatabaseReference childRef = geoFire.getDatabaseRefForKey("2").child("some_child");
+        setValueAndWait(childRef, "some_value"); // data changed
+
+        List<String> events = new LinkedList<>();
+        events.add(GeoQueryDataEventTestListener.dataMoved("1", 37.0001, -122.0001));
+        events.add(GeoQueryDataEventTestListener.dataChanged("1", 37.0001, -122.0001));
+
+        events.add(GeoQueryDataEventTestListener.dataMoved("4", 37.0002, -121.9999));
+        events.add(GeoQueryDataEventTestListener.dataChanged("4", 37.0002, -121.9999));
+
+        events.add(GeoQueryDataEventTestListener.dataChanged("2", 37.0001, -122.0001));
+
+        testListener.expectEvents(events);
+    }
+
     @Test
     public void subQueryTriggersKeyMoved() throws InterruptedException {
         GeoFire geoFire = newTestGeoFire();