Index: trunk/test/unit/org/openstreetmap/josm/tools/ColorScaleTest.java
===================================================================
--- trunk/test/unit/org/openstreetmap/josm/tools/ColorScaleTest.java	(revision 9234)
+++ trunk/test/unit/org/openstreetmap/josm/tools/ColorScaleTest.java	(revision 9234)
@@ -0,0 +1,33 @@
+// License: GPL. For details, see LICENSE file.
+package org.openstreetmap.josm.tools;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNull;
+
+import java.awt.Color;
+
+import org.junit.Test;
+
+public class ColorScaleTest {
+
+    /**
+     * Test method for {@link ColorScale#createHSBScale(int)}.
+     */
+    @Test
+    public void testHSBScale() throws Exception {
+        final ColorScale scale = ColorScale.createHSBScale(256);
+        assertEquals(new Color(255, 0, 0), scale.getColor(0));
+        assertEquals(new Color(0, 255, 143), scale.getColor(128));
+        assertEquals(new Color(255, 0, 229), scale.getColor(255));
+
+        assertEquals(new Color(255, 0, 0), scale.getColor(-1000));
+        assertEquals(new Color(255, 0, 229), scale.getColor(1000));
+
+        assertNull(scale.getColor(Double.NaN));
+        assertNull(scale.getColor(null));
+        scale.setNoDataColor(new Color(12, 34, 56));
+        assertEquals(new Color(12, 34, 56), scale.getNoDataColor());
+        assertEquals(new Color(12, 34, 56), scale.getColor(Double.NaN));
+        assertEquals(new Color(12, 34, 56), scale.getColor(null));
+    }
+}