Show GPS accuracy while recording in the notification of the TrackRecordingService and notify if accuracy goes beyond configured threshold.

src/androidTest/java/de/dennisguse/opentracks/services/TrackRecordingServiceNotificationManagerTest.java

@@ -0,0 +1,54 @@
+package de.dennisguse.opentracks.services;
+
+import android.app.NotificationManager;
+import android.content.Context;
+import android.location.Location;
+
+import androidx.core.app.NotificationCompat;
+import androidx.test.core.app.ApplicationProvider;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.junit.MockitoJUnitRunner;
+
+import static org.mockito.ArgumentMatchers.anyBoolean;
+import static org.mockito.ArgumentMatchers.anyString;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+@RunWith(MockitoJUnitRunner.class)
+public class TrackRecordingServiceNotificationManagerTest {
+
+    private Context context = ApplicationProvider.getApplicationContext();
+
+    @Mock
+    private Location locationMock;
+
+    @Mock
+    private NotificationCompat.Builder notificationCompatBuilder;
+
+    @Mock
+    private NotificationManager notificationManager;
+
+    @Test
+    public void updateLocation_triggersAlertOnlyOnFirstInaccurateLocation() {
+        when(locationMock.hasAccuracy()).thenReturn(true);
+        when(locationMock.getAccuracy()).thenReturn(999f);
+        when(notificationCompatBuilder.setContentText(anyString())).thenReturn(notificationCompatBuilder);
+        when(notificationCompatBuilder.setOnlyAlertOnce(anyBoolean())).thenReturn(notificationCompatBuilder);
+
+        TrackRecordingServiceNotificationManager subject = new TrackRecordingServiceNotificationManager(notificationManager, notificationCompatBuilder);
+
+        // when
+        subject.updateLocation(context, locationMock, 100);
+        subject.updateLocation(context, locationMock, 100);
+        subject.updateLocation(context, locationMock, 1000);
+        subject.updateLocation(context, locationMock, 100);
+
+        // then
+        verify(notificationCompatBuilder, times(6)).setOnlyAlertOnce(true);
+        verify(notificationCompatBuilder, times(2)).setOnlyAlertOnce(false);
+    }
+}