Merge pull request #105 from pgelinas/issue104

Unit test for issue #104.

Author: cowtowncoder

src/test/java/com/fasterxml/jackson/dataformat/xml/TestIssue104.java

@@ -0,0 +1,45 @@
+package com.fasterxml.jackson.dataformat.xml;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import com.fasterxml.jackson.annotation.JsonIdentityInfo;
+import com.fasterxml.jackson.annotation.ObjectIdGenerators;
+
+/**
+ * Unit test to showcase issue #104, based on TestObjectIdDeserialization unit test in databind package.
+ *
+ */
+public class TestIssue104 extends XmlTestBase {
+    // // Classes for external id from property annotations:
+    
+    static class IdWrapper
+    {
+        @JsonIdentityInfo(generator=ObjectIdGenerators.IntSequenceGenerator.class, property="id")
+        public ValueNode node;
+
+        public IdWrapper() { }
+        public IdWrapper(int v) {
+            node = new ValueNode(v);
+        }
+    }
+
+    static class ValueNode {
+        public List<Integer> value= new ArrayList<Integer>();
+        public IdWrapper next;
+        
+        public ValueNode() { this(0); }
+        public ValueNode(int v) { value.add(v); }
+    }
+    
+    private final XmlMapper MAPPER = new XmlMapper();
+    
+    // Another test to ensure ordering is not required (i.e. can do front references)
+    public void testSimpleCollectionDeserWithForwardRefs() throws Exception
+    {
+        IdWrapper result = MAPPER.readValue("<IdWrapper><node><value><value>7</value></value><next><node>1</node></next><id>1</id></node></IdWrapper>"
+                ,IdWrapper.class);
+        assertEquals(7, (int)result.node.value.get(0));
+        assertSame(result.node, result.node.next.node);
+    }
+}