2 files changed, 68 insertions, 6 deletions
diff --git a/src/main/java/org/traccar/handler/events/MaintenanceEventHandler.java b/src/main/java/org/traccar/handler/events/MaintenanceEventHandler.java
index 4fcfcd079..909950acf 100644
--- a/src/main/java/org/traccar/handler/events/MaintenanceEventHandler.java
+++ b/src/main/java/org/traccar/handler/events/MaintenanceEventHandler.java
@@ -51,13 +51,15 @@ public class MaintenanceEventHandler extends BaseEventHandler {
             if (maintenance.getPeriod() != 0) {
                 double oldValue = lastPosition.getDouble(maintenance.getType());
                 double newValue = position.getDouble(maintenance.getType());
-                if (oldValue != 0.0 && newValue != 0.0
-                        && (long) ((oldValue - maintenance.getStart()) / maintenance.getPeriod())
+                if (oldValue != 0.0 && newValue != 0.0 && newValue >= maintenance.getStart()) {
+                    if (oldValue < maintenance.getStart()
+                        || (long) ((oldValue - maintenance.getStart()) / maintenance.getPeriod())
                         < (long) ((newValue - maintenance.getStart()) / maintenance.getPeriod())) {
-                    Event event = new Event(Event.TYPE_MAINTENANCE, position);
-                    event.setMaintenanceId(maintenance.getId());
-                    event.set(maintenance.getType(), newValue);
-                    events.put(event, position);
+                        Event event = new Event(Event.TYPE_MAINTENANCE, position);
+                        event.setMaintenanceId(maintenance.getId());
+                        event.set(maintenance.getType(), newValue);
+                        events.put(event, position);
+                    }
                 }
             }
         }
diff --git a/src/test/java/org/traccar/handler/events/MaintenanceEventHandlerTest.java b/src/test/java/org/traccar/handler/events/MaintenanceEventHandlerTest.java
new file mode 100644
index 000000000..aa2d0bbe3
--- /dev/null
+++ b/src/test/java/org/traccar/handler/events/MaintenanceEventHandlerTest.java
@@ -0,0 +1,60 @@
+package org.traccar.handler.events;
+
+import org.junit.Test;
+import org.traccar.BaseTest;
+import org.traccar.model.Maintenance;
+import org.traccar.model.Position;
+import org.traccar.session.cache.CacheManager;
+
+import java.util.Arrays;
+import java.util.Date;
+
+import static org.junit.Assert.assertTrue;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.ArgumentMatchers.anyLong;
+
+public class MaintenanceEventHandlerTest extends BaseTest {
+    
+    @Test
+    public void testMaintenanceEventHandler() {
+        Position lastPosition = new Position();
+        lastPosition.setDeviceId(1);
+        lastPosition.setFixTime(new Date(0));
+
+        Position position = new Position();
+        position.setDeviceId(1);
+        position.setFixTime(new Date(0));
+
+        var maintenance = mock(Maintenance.class);
+        when(maintenance.getType()).thenReturn(Position.KEY_TOTAL_DISTANCE);
+        var maintenances = Arrays.asList(maintenance);
+
+        var cacheManager = mock(CacheManager.class);
+        when(cacheManager.getDeviceObjects(anyLong(), eq(Maintenance.class))).thenReturn(maintenances);
+        when(cacheManager.getPosition(anyLong())).thenReturn(lastPosition);
+        MaintenanceEventHandler eventHandler = new MaintenanceEventHandler(cacheManager);        
+
+        when(maintenance.getStart()).thenReturn(10000.0);
+        when(maintenance.getPeriod()).thenReturn(2000.0);                
+ 
+        lastPosition.set(Position.KEY_TOTAL_DISTANCE, 1999);
+        position.set(Position.KEY_TOTAL_DISTANCE, 2001);        
+        assertTrue(eventHandler.analyzePosition(position).isEmpty());
+
+        lastPosition.set(Position.KEY_TOTAL_DISTANCE, 3999);
+        position.set(Position.KEY_TOTAL_DISTANCE, 4001);        
+        assertTrue(eventHandler.analyzePosition(position).isEmpty());
+
+        lastPosition.set(Position.KEY_TOTAL_DISTANCE, 9999);
+        position.set(Position.KEY_TOTAL_DISTANCE, 10001);        
+        assertTrue(eventHandler.analyzePosition(position).size() == 1);
+
+        lastPosition.set(Position.KEY_TOTAL_DISTANCE, 11999);
+        position.set(Position.KEY_TOTAL_DISTANCE, 12001);        
+        assertTrue(eventHandler.analyzePosition(position).size() == 1);
+        
+    }
+
+}