Index: trunk/test/unit/org/openstreetmap/josm/gui/util/RotationAngleTest.java
===================================================================
--- trunk/test/unit/org/openstreetmap/josm/gui/util/RotationAngleTest.java	(revision 8199)
+++ trunk/test/unit/org/openstreetmap/josm/gui/util/RotationAngleTest.java	(revision 8199)
@@ -0,0 +1,38 @@
+package org.openstreetmap.josm.gui.util;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.junit.Assert.assertThat;
+
+import org.junit.Test;
+
+public class RotationAngleTest {
+
+    @Test
+    public void testParseRad() throws Exception {
+        assertThat(RotationAngle.buildStaticRotation("0.54rad").getRotationAngle(null), is(0.54));
+        assertThat(RotationAngle.buildStaticRotation("1.").getRotationAngle(null), is(1.));
+    }
+
+    @Test
+    public void testParseDeg() throws Exception {
+        assertThat(RotationAngle.buildStaticRotation("180°").getRotationAngle(null), is(Math.PI));
+        assertThat(RotationAngle.buildStaticRotation("90deg").getRotationAngle(null), is(Math.PI / 2));
+    }
+
+    @Test
+    public void testParseCardinal() throws Exception {
+        assertThat(RotationAngle.buildStaticRotation("south").getRotationAngle(null), is(Math.PI));
+        assertThat(RotationAngle.buildStaticRotation("s").getRotationAngle(null), is(Math.PI));
+        assertThat(RotationAngle.buildStaticRotation("northwest").getRotationAngle(null), is(Math.toRadians(315)));
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void testParseFail() throws Exception {
+        RotationAngle.buildStaticRotation("0.54bad");
+    }
+
+    @Test(expected = NullPointerException.class)
+    public void testParseNull() throws Exception {
+        RotationAngle.buildStaticRotation(null);
+    }
+}