Preserve Enumeration ordering when building display list in MappedEnum.

Closes lift#1142

persistence/mapper/src/test/scala/net/liftweb/mapper/MappedEnumSpec.scala

@@ -0,0 +1,52 @@
+/*
+ * Copyright 2010-2011 WorldWide Conferencing, LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.liftweb
+package mapper
+
+import org.specs.Specification
+
+import common._
+
+object MyEnum extends Enumeration {
+  val a = Value
+  val b = Value
+  val c = Value
+  val d = Value
+  val e = Value
+}
+
+class EnumObj extends LongKeyedMapper[EnumObj] with IdPK {
+  def getSingleton = EnumObj
+
+  object enum extends MappedEnum(this, MyEnum)
+}
+
+
+object EnumObj extends EnumObj with LongKeyedMetaMapper[EnumObj] 
+
+
+object MappedEnumSpec extends Specification("MappedEnum Specification") {
+  "MappedEnum" should {
+    "preserve enumeration order when building display list" in {
+      val v = EnumObj.create
+
+      import MyEnum._
+      v.enum.buildDisplayList must_== List(a.id -> a.toString, b.id -> b.toString, c.id -> c.toString, d.id -> d.toString, e.id -> e.toString)
+    }
+  }
+}
+