Index: gnu/testlet/java/util/EnumSet/Colour.java
===================================================================
RCS file: gnu/testlet/java/util/EnumSet/Colour.java
diff -N gnu/testlet/java/util/EnumSet/Colour.java
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ gnu/testlet/java/util/EnumSet/Colour.java	21 Aug 2007 22:59:14 -0000
@@ -0,0 +1,38 @@
+// Tags: not-a-test
+
+// Copyright (C) 2007 Andrew John Hughes <gnu_andrew@member.fsf.org>
+
+// This file is part of Mauve.
+
+// Mauve is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2, or (at your option)
+// any later version.
+
+// Mauve is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Mauve; see the file COPYING.  If not, write to
+// the Free Software Foundation, 59 Temple Place - Suite 330,
+// Boston, MA 02111-1307, USA.
+
+package gnu.testlet.java.util.EnumSet;
+
+/**
+ * A test enumeration.
+ *
+ * @author <a href="mailto:gnu_andrew@member.fsf.org">Andrew John Hughes</a>
+ */
+public enum Colour
+{
+  RED,
+  ORANGE,
+  YELLOW,
+  GREEN,
+  BLUE,
+  INDIGO,
+  VIOLET;
+}
Index: gnu/testlet/java/util/EnumSet/ComplementOf.java
===================================================================
RCS file: gnu/testlet/java/util/EnumSet/ComplementOf.java
diff -N gnu/testlet/java/util/EnumSet/ComplementOf.java
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ gnu/testlet/java/util/EnumSet/ComplementOf.java	21 Aug 2007 22:59:14 -0000
@@ -0,0 +1,52 @@
+// Tags: JDK1.5
+
+// Copyright (C) 2007 Andrew John Hughes <gnu_andrew@member.fsf.org>
+
+// This file is part of Mauve.
+
+// Mauve is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2, or (at your option)
+// any later version.
+
+// Mauve is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Mauve; see the file COPYING.  If not, write to
+// the Free Software Foundation, 59 Temple Place - Suite 330,
+// Boston, MA 02111-1307, USA.
+
+package gnu.testlet.java.util.EnumSet;
+
+import gnu.testlet.TestHarness;
+import gnu.testlet.Testlet;
+
+import java.util.EnumSet;
+
+/**
+ * Tests the {@link java.util.EnumSet#complementOf(java.util.EnumSet)}
+ * method.
+ *
+ * @author <a href="mailto:gnu_andrew@member.fsf.org">Andrew John Hughes</a>
+ */
+public class ComplementOf
+  implements Testlet
+{
+
+  public void test(TestHarness h)
+  {
+    /* Inverse of empty set should be full set */
+    EnumSet<Colour> empty = EnumSet.noneOf(Colour.class);
+    h.debug("Empty: " + empty);
+    EnumSet<Colour> full = EnumSet.complementOf(empty);
+    h.debug("Full: " + full);
+    h.check(full.size() == Colour.class.getEnumConstants().length, "Inverse of empty is full");
+    EnumSet<Colour> empty2 = EnumSet.complementOf(full);
+    h.debug("Empty2: " + empty2);
+    h.check(empty2.size() == 0, "Inverse of full is empty");
+    h.check(empty.equals(empty2), "Inversing the inverse is same as original");
+  }
+}