Index: trunk/test/unit/org/openstreetmap/josm/tools/UtilsTest.java
===================================================================
--- trunk/test/unit/org/openstreetmap/josm/tools/UtilsTest.java	(revision 6155)
+++ trunk/test/unit/org/openstreetmap/josm/tools/UtilsTest.java	(revision 6175)
@@ -51,3 +51,17 @@
         Assert.assertEquals("abc", Utils.strip(someWhite+"abc"+someWhite));
     }
+
+    /**
+     * Test of {@link Utils#toHexString} method.
+     */
+    @Test
+    public void testToHexString(){
+        Assert.assertEquals("", Utils.toHexString(null));
+        Assert.assertEquals("", Utils.toHexString(new byte[0]));
+        Assert.assertEquals("01", Utils.toHexString(new byte[]{0x1}));
+        Assert.assertEquals("0102", Utils.toHexString(new byte[]{0x1,0x2}));
+        Assert.assertEquals("12", Utils.toHexString(new byte[]{0x12}));
+        Assert.assertEquals("127f", Utils.toHexString(new byte[]{0x12, 0x7f}));
+        Assert.assertEquals("fedc", Utils.toHexString(new byte[]{(byte) 0xfe, (byte) 0xdc}));
+    }
 }