Index: trunk/test/unit/org/openstreetmap/josm/gui/io/DownloadPrimitivesTaskTest.java
===================================================================
--- trunk/test/unit/org/openstreetmap/josm/gui/io/DownloadPrimitivesTaskTest.java	(revision 10976)
+++ trunk/test/unit/org/openstreetmap/josm/gui/io/DownloadPrimitivesTaskTest.java	(revision 10976)
@@ -0,0 +1,44 @@
+// License: GPL. For details, see LICENSE file.
+package org.openstreetmap.josm.gui.io;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+
+import java.util.Arrays;
+
+import org.junit.Rule;
+import org.junit.Test;
+import org.openstreetmap.josm.data.osm.DataSet;
+import org.openstreetmap.josm.data.osm.OsmPrimitiveType;
+import org.openstreetmap.josm.data.osm.SimplePrimitiveId;
+import org.openstreetmap.josm.gui.layer.OsmDataLayer;
+import org.openstreetmap.josm.testutils.JOSMTestRules;
+
+import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
+
+/**
+ * Unit tests of {@link DownloadPrimitivesTask} class.
+ */
+public class DownloadPrimitivesTaskTest {
+
+    /**
+     * Setup tests
+     */
+    @Rule
+    @SuppressFBWarnings(value = "URF_UNREAD_PUBLIC_OR_PROTECTED_FIELD")
+    public JOSMTestRules test = new JOSMTestRules().preferences().devAPI();
+
+    /**
+     * Test of {@link DownloadPrimitivesTask} class.
+     */
+    @Test
+    public void testDownloadPrimitivesTask() {
+        DataSet ds = new DataSet();
+        assertTrue(ds.allPrimitives().isEmpty());
+        SimplePrimitiveId pid = new SimplePrimitiveId(1, OsmPrimitiveType.NODE);
+        new DownloadPrimitivesTask(new OsmDataLayer(ds, "", null), Arrays.asList(pid), true).run();
+        assertFalse(ds.allPrimitives().isEmpty());
+        assertNotNull(ds.getPrimitiveById(pid));
+    }
+}