Add a failing test for #1003

Author: cowtowncoder

src/test/java/com/fasterxml/jackson/failing/DelegatingExternalProperty1003Test.java

@@ -0,0 +1,56 @@
+package com.fasterxml.jackson.failing;
+
+import com.fasterxml.jackson.annotation.*;
+
+import com.fasterxml.jackson.databind.*;
+
+public class DelegatingExternalProperty1003Test extends BaseMapTest
+{
+    static class HeroBattle {
+
+        private final Hero hero;
+
+        private HeroBattle(Hero hero) {
+            if (hero == null) throw new Error();
+            this.hero = hero;
+        }
+
+        @JsonTypeInfo(use = JsonTypeInfo.Id.CLASS, include = JsonTypeInfo.As.EXTERNAL_PROPERTY, property = "heroType")
+        public Hero getHero() {
+            return hero;
+        }
+
+        @JsonCreator
+        static HeroBattle fromJson(Delegate json) {
+            return new HeroBattle(json.hero);
+        }
+    }
+
+    static class Delegate {
+        @JsonProperty
+        @JsonTypeInfo(use = JsonTypeInfo.Id.CLASS, include = JsonTypeInfo.As.EXTERNAL_PROPERTY, property = "heroType")
+        public Hero hero;
+    }
+
+    public interface Hero { }
+
+    static class Superman implements Hero {
+        public String getName() {
+            return "superman";
+        }
+    }    
+
+    public void testExtrnalPropertyDelegatingCreator() throws Exception
+    {
+        ObjectMapper mapper = new ObjectMapper();
+
+        final String json = mapper.writeValueAsString(new HeroBattle(new Superman()));
+
+//System.err.println("JSON: "+json);        
+        final HeroBattle battle = mapper.readValue(json, HeroBattle.class);
+
+        assert battle.getHero() instanceof Superman;
+    }
+
+    
+}